1 WORKING PLATFORM SYSTEM TECHNICAL FIELD A method and apparatus are disclosed that facilitate the installation of building 5 materials (including but not limited to construction or building wraps/sarking materials, insulation batts/blankets, insulation cladding, fascias, guttering, etc) to a building. The method and apparatus can collectively provide a system which facilitates the installation of such materials. Whilst the method, apparatus and system have been developed, and will primarily be 0 described, in relation to the installation of insulation materials, it should be understood that they can also be applied to other construction activities and materials. BACKGROUND ART In a known methodology for the installation of so-called "building-wraps", the 5 installer or builder is required to visit a multi-storey or elevated dwelling a number of times to complete the install. For example, for a double-story dwelling, a first visit is made by the installer or builder to install the building-wrap onto the exposed frame of the completed lower or upper storey (e.g. to "wrap" an existing wall frame). Thereafter, an outer cladding (e.g. bricks, board, fascia, guttering, etc) is then installed around the now wrapped wall frame of 0 the completed storey, and this is accompanied by the placement and building up of scaffolding by the party installing the cladding. Then, a second visit is made by the installer or builder to install the building wrap onto the exposed frame of the final storey, making use of that scaffolding placement. Finally, installation of cladding for the final storey can be completed. The process can take a number of days or weeks, and can be even more 25 cumbersome for dwellings comprising more than two storeys, or dwellings situated on a sloping or elevated site. In the roofing industry, it is known to install temporary scaffolding to provide a fencing perimeter around the roof that can act as a fall arrestor (i.e. to help prevent roofer/installer injury). Such temporary scaffolding may be referred to as hanging, suspended 30 or cantilever scaffolding, in that it is not supported from the ground, but is rather mounted to hang or suspend from an existing roof frame member (e.g. at or adjacent the eaves of a roof). The above references to the background art do not constitute an admission that the art forms a part of the common general knowledge of a person of ordinary skill in the art. The 2 above references are also not intended to limit the application of the method, apparatus and system as disclosed herein. SUMMARY OF THE DISCLOSURE 5 Disclosed herein is a method for the installation of insulation-type building materials and the like at a building. Such materials can include construction/building wrap/sarking, insulation batts/blankets, foam cladding board, fascia boards, but also guttering, eaves, services, etc. The method can be favourably deployed with multi-storey residential dwellings as 0 well as with single storey residential dwellings that are elevated (e.g. where the dwelling is located at a sloping site and/or the dwelling is elevated on poles, stilts, piers, etc). However, it should be understood that the method can be adapted and used with other types of multi storey and elevated buildings (e.g. industrial buildings, factories, warehouses, public buildings, etc). 5 In the method as disclosed herein, insulation material is installed at a lower storey of the building and scaffolding is suspended at the building at a selected storey of the building that is above the lower storey of the building. This suspended scaffolding is employed to install the insulation material at the selected storey of the building (including at a section of that storey) so as to provide weather resistance at the selected storey that is sufficient to 0 allow internal trades to commence work prior to installation of cladding on the building. The method further comprises removing the suspended scaffolding from the selected storey of the building. In the method as disclosed herein, the scaffolding can be suspended at the selected storey before or after the material is installed at the other storey of the building. 25 In the method as disclosed herein, the selected storey at which the scaffolding is suspended can be located above a lower storey of the building. In one embodiment of the method, the material can be installed at the lower storey, and thereafter the scaffolding can be suspended at the selected storey. In another embodiment of the method, the scaffolding can be suspended and the 30 material can be installed at the selected storey, and thereafter the material can be installed at the lower storey. Optionally, the material can be installed at the lower storey after removing the suspended scaffolding from the selected storey. The method as disclosed herein is different to the technique of installing temporary 3 scaffolding to provide a fencing perimeter around a roof that can act as a fall arrestor. The nature of such temporary scaffolding is that it is not suited to a method of installing insulation-type materials as disclosed herein. The method as disclosed herein is also different to the installation of a final outer 5 cladding at the building (e.g. bricks, weatherboard, external fascia materials, render, etc). Typically the installation of the outer cladding employs much bulkier and larger scale scaffolding, which is progressively constructed from the ground up (i.e. after the insulation material has been installed). In a first mode of implementing the method as disclosed herein, the suspended 0 scaffolding can be employed to install, at a selected storey, materials such as construction or building wraps/sarking materials, insulation batts/blankets, insulation (e.g. foam) panels, guttering, eaves etc. These having been installed, the suspended scaffolding can be removed and then the final outer cladding can be installed at the building in a known manner. It has been observed that this first mode of implementing the method can simplify 5 various stages in the construction of the building, and can also increase the speed of construction. For example, internal tradespeople may commence work earlier than they would otherwise be able to, because the insulation material installed at a selected storey can offer weather resistance at that storey. Also, this first mode of implementing the method can avoid multiple visits needing to be made by tradespeople (e.g. installers, bricklayers, builders, 0 contractors etc), in that the insulation materials and, later, the cladding materials can each be installed at the one time, at the one or more storeys. Further, after insulating or "wrapping" the selected storey, because suspended scaffolding tends to be less bulky, it can quickly be dismounted and, as required, re-erected by the builder/installer without costly and timely delays in waiting for a scaffolding team to 25 reposition large and bulky scaffolding. Also, where the scaffolding to be suspended is lightweight, it may be erected and demounted by a single user, thereby eliminating the need for a scaffolding team. In a second mode of implementing the method, the suspended scaffolding may be used to install, at the selected storey, certain types of final cladding or external fascia 30 materials, etc. For example, after insulating or "wrapping" the selected storey, the same suspended scaffolding can be used to clad that storey with e.g. weatherboard, external fascia or panel materials, etc. This is because such materials tend to have a thickness that enables them to be positioned between the insulating/wrapping and the suspended scaffolding. When the building comprises multiple storeys, the selected storey at which the 4 scaffolding is suspended can be located above a lower storey of the building. The suspended scaffolding can be used to install material at one or more upper storeys located above the lower storey, before or after the material is installed at the lower storey of the building. Usually (although not essential), installation of material at the lower storey takes place with 5 the suspended scaffolding removed. When the building comprises just a single storey, that storey now defines the selected storey at which the scaffolding is to be suspended. Suspended scaffolding may again be employed because typically that storey is elevated above the surrounding ground (e.g. the building may be located at a sloping site, or may be located on poles, stilts, piers, etc). Here, 0 the scaffolding can again be suspended to provide rapid and easy access to the sloping-away or elevated side of the building. In the method as disclosed herein the material can be installed at a pre-existing wall frame of the selected storey of the building. In the method as disclosed herein the perimeter of the selected storey of the building 5 can be installed with the material. For example, the entire outside of the selected storey can be "wrapped" or panelled. Alternatively, just a section may be installed with the material. In the method as disclosed herein the scaffolding can be secured to a floor of the selected storey of the building to suspend therefrom. Securing the scaffolding to the floor means that the scaffolding can have minimal interference with the materials being installed at 0 that storey (e.g. to the wall frame). In the method as disclosed herein the scaffolding can be manoeuvred into its suspended position from a ground location (e.g. by a single user). The manoeuvring of the scaffolding by the user may be facilitated by a member that extends down from the scaffolding in use. That member can enable the user to position the scaffolding remotely, e.g. 25 at the floor of the selected storey. That member may also form a supporting part of the scaffolding once it has been suspended. As part of the method, the user may step out onto the suspended scaffolding from the floor of the selected storey, or may climb up onto the suspended scaffolding using a ground located ladder. 30 In the method as disclosed herein, when the building comprises more than two storeys, scaffolding suspended at a selected intermediate storey may be employed to suspend scaffolding at a storey above the selected intermediate storey. Also disclosed herein is an apparatus for the installation of an insulation material at a 5 wall frame of a selected storey of a multi-storey building or of an elevated single storey building. The apparatus can be used in the method as set forth above and as part of the system as disclosed herein. The apparatus can form part of e.g. a working platform as disclosed herein, such as may also comprise one or more planks, etc. 5 The apparatus comprises a scaffolding frame that is configured to be suspended laterally from the selected storey. The apparatus also comprises a mounting plate that projects laterally from the scaffolding frame. The mounting plate comprises a portion for hooking over the wall frame. The mounting plate also comprises a floor-mountable flange that projects laterally from the 0 hook-over portion. The hook-over portion can be employed, for example, to initially locate the apparatus at the wall frame of the selected storey. In this regard, the apparatus can be manoeuvred and hooked into place on the frame (e.g. from a remote location such as building ground level). When the apparatus is formed from lightweight components, it may be manoeuvred by a 5 single user. Once the hook-over portion is so-located, the floor-mountable flange can be used to secure the mounting plate to a floor of the selected storey (e.g. using releasable fasteners, such as screws). In this regard, the floor-mountable flange may be configured for being secured to a floor of the selected storey by the provision of e.g. one or more apertures therein, 0 and through which apertures one or more respective fasteners can be inserted into the floor to secure the flange thereto. After use of the apparatus, the fasteners can be reversed, and the apparatus moved away from the selected storey. In one embodiment of the apparatus, the hook-over portion may also be configured to be secured to a base plate of the wall frame at the selected storey. For example, one or more 25 apertures can be provided in the hook-over portion, and through which apertures one or more respective fasteners (e.g. screws) can be inserted into the base plate to secure the flange thereto. Again, after use of the apparatus, these fasteners can also be reversed, so that the apparatus can be moved away from the selected storey. 30 Also disclosed herein is an apparatus for the installation of an insulation material at a wall frame of a selected storey of a multi-storey building or of an elevated single storey building. Again, the apparatus can be used in the method as set forth above and as part of the system as disclosed herein. Again, the apparatus can form part of a working platform as disclosed herein.
6 Again, the apparatus comprises a scaffolding frame that is configured to be suspended laterally from the selected storey. The apparatus also comprises an extension member that is arranged to extend downwardly from the scaffolding frame in use. The degree of downward extension of the 5 member can be adjusted with respect to the scaffolding frame. The effective length of the extension member can thus be adjusted to accommodate different storey heights. The extension member can be used to manoeuvre the apparatus into its location at the selected storey (e.g. from a ground level adjacent to the building). The extension member can also form part of a support frame that helps to redistribute loads placed on the scaffold frame 0 in use (e.g. to redistribute the load to an adjacent wall frame). In one embodiment of the apparatus, the scaffolding frame may comprise an in-use horizontal member that extends laterally from the selected storey. The scaffolding frame may also comprise an in-use vertical wall-facing member from which the extension member extends downwardly in use. 5 The apparatus may be configured such that the degree of downward extension of the extension member is able to be adjusted at the vertical member. For example, the vertical member may comprise a hollow section into which the extension member may e.g. be snugly received (or vice versa). Further, the extension member may be able to slide into and out of the hollow section (or vice versa) to enable the degree of downward extension of the 0 extension member to be adjusted in use. In this embodiment of the apparatus, one or more fasteners (e.g. bolts or pins) may be provided that can be arranged to engage between the vertical member and the extension member to releasably lock the extension member against movement with respect to the vertical member. 25 In one embodiment of the apparatus, a wall brace may be provided which is able to be connected to extend horizontally in use from the extension member. This wall brace can also help to redistribute loads placed on the scaffold frame in use (e.g. by transferring them on to an adjacent wall frame). In this embodiment of the apparatus, the wall brace may be able to be connected to an 30 in-use lower end of the extension member. The wall brace may be positioned and or a length to span two adjacent studs in the wall frame of a selected storey. The wall brace may also be able to connect to an in-use lower end of the extension member of an adjacent like, spaced scaffolding frame that is also suspended laterally from the selected storey. When so arranged, the two adjacent extension members and an 7 interconnecting wall brace can provide the aforementioned support frame, being a frame that extends from and is connected to the two adjacent like apparatus. This support frame may be used to manoeuvre the two apparatus into location at the selected storey (e.g. from a ground level adjacent to the building). This support frame may also help to redistribute loads placed 5 on the two scaffold frames in use (e.g. to an adjacent wall frame). Alternatively, the support frame may be formed after the two apparatus are located in place at the selected storey. The two apparatus may also be connected via safety rails extending therebetween. In this case, the safety rails may, instead of or in addition to the support frame, be employed to connect the two apparatus. 0 The apparatus as set forth above may further comprise a step-up support arranged at and supported by the scaffolding frame. The step-up support can locate e.g. an elevated working platform thereat. The step-up support can allow an installation installer to stand thereon and to thereby safely reach an upper region of an adjacent wall frame when installing installation. 5 Also disclosed herein is a system for the installation of an insulation material. The system can be operated to affect the method as set forth above. The system can also comprise and make use of the apparatus as set forth above. The system as disclosed herein comprises a platform (e.g. a working platform) that is 0 able to be temporarily located at a selected storey of a multi-storey building. The system can be operated such that, once the platform has been located at the selected storey of the building, it is able to be employed to install the material at the selected storey of the building. In the system as disclosed herein, the platform can be located at the selected storey before or after insulation material is installed at a storey below the selected storey. 25 In the system as disclosed herein, after installation of the material at the selected storey, the platform can be removed. For example, the platform may be temporarily located at the selected storey by supporting one or more planks on two or more apparatus as set forth above. In the system as disclosed herein, prior to installing the building material at the 30 selected storey of the building, multiple apparatus (as set forth above) may be suspended laterally at and around a perimeter of the selected storey. BRIEF DESCRIPTION OF THE DRAWINGS 8 Notwithstanding any other forms which may fall within the scope of the method, apparatus and system as set forth in the Summary, further embodiments of the method, apparatus and system will now be provided in the following description, which is selected by way of example only, and with reference to the accompanying drawings in which: 5 Figures 1A to ID show an embodiment of the apparatus in-situ (Figure 1A), and various components of the apparatus (Figures 1B to ID) according to the present disclosure; Figures 2A to 2C respectively show plan, side and perspective views of a mounting plate component of the apparatus of Figure 1; Figure 3 shows a perspective view of a plank clamp component of the apparatus of 0 Figure 1; Figures 4A and 4B respectively show perspective views of a wall brace component and extension member component of the apparatus of Figure 1; and Figures 5A and 5B respectively show schematic loading diagrams of the apparatus of Figure 1. 5 DETAILED DESCRIPTION OF SPECIFIC EMBODIMENTS Referring to the drawings, an apparatus for the installation of building material at a multi-storey building (e.g. a two-storey dwelling) is shown in the form of a temporary working platform 10. The working platform 10 will herein be described in relation to the 0 installation at a building of insulation materials such as construction wraps and sarking, but can also be deployed for the installation of materials such as foam cladding, internal fascia materials, as well as guttering, eaves etc. In this regard, the working platform 10 can be employed to install a range of different materials at a building Also, the working platform 10 can be deployed for other construction activities (e.g. 25 painting, rendering, plastering, connecting of services, etc). Further, the working platform 10 can be employed to install certain types of external cladding (e.g. thinner forms of cladding such as weatherboard and panels). The working platform 10 comprises at least two scaffolding frames 12 (one such frame being shown in Figure ID). The working platform 10 also comprises one or more 30 planks 14 (two such planks being shown in Figure 1A) that are supported on and that span between the scaffolding frames 12. The working platform 10 can be used in an installation methodology and system as hereafter described. Each scaffolding frame 12 is configured to be suspended laterally from a selected storey of the multi-storey building (e.g. from the first storey as shown in Figures 1A, 5A and 9 5B). In this regard, the scaffolding frame 12 comprises a mounting plate in the form of a bent plate part 16. As best shown in Figure 2, the plate part 16 has a first section 18 that is configured to be secured (e.g. welded) to project laterally from an inbound, underside end of 5 an in-use horizontal tube member 20 of the scaffolding frame 12 (Figure ID). The plate part 16 has a second section 22 that extends downwards from the first section 18 to define a hook section of the plate part 16 for hooking over a base plate B of a wall frame F of the selected storey. The hook section 22 is employed to initially locate the scaffolding frame 12 at the wall frame F. In this regard, the scaffolding frame 12 is 0 manoeuvred and hooked into place over the base plate B of wall frame F, usually being manoeuvred from a remote location such as building ground level L (Figure 1A), or manoeuvred from an intermediate scaffolding level. The plate part 16 also has a third in-use horizontal section 24 that extends out from the hook section 22 to define a flange section of the plate part 16 for mounting at a floor FL 5 of the selected storey of the building (Figure 1A). In this regard, once the hook section 22 has been hooked over the base plate B of wall frame F, the flange section 24 is secured to the floor FL of the selected storey using releasable, typically self-tapping screw fasteners. In this regard, the flange section 24 is provided with two apertures 26 therein, and the fasteners can be inserted through these apertures and driven into the floor to secure the plate part 16, and 0 thereby secure the scaffolding frame 12 to the selected storey. Optionally, the hook section 22 is provided with two apertures 28 therein, which locate on either side of the end of tube member 20 (Figure ID). Typically self-tapping screw fasteners can then be inserted through apertures 28 and driven into the base plate B to further secure the plate part 16 and thus the scaffolding frame 12 to the selected storey. Again, after 25 use of the working platform 10 (e.g. after the installation of material at the selected storey), these fasteners can be reversed, so that the working platform can be moved away from the selected storey. The working platform 10 further comprises an optional extension member in the form of extension bar 30 that is arranged to extend downwardly from each scaffolding frame 12 in 30 use. Each extension bar 30 is used to manoeuvre its respective scaffolding frame 12 into its location at the selected storey, typically from the ground level L adjacent to the building or from an intermediate scaffolding level. The extension bar 30 can form part of a support framework of the working platform 10 (further described below) that can redistribute load to an adjacent wall frame F' (i.e. the frame of an underlying storey), being the load that is 10 placed on the working platform 10 in use. The degree of downward extension, and thus the effective length, of the extension bar 30 is able to be adjusted with respect to the scaffolding frame 12. To enable this, the scaffolding frame 12 is provided with an in-use vertical, wall-facing tube member 32 from 5 which the extension bar 30 extends downwardly in use. As shown in Figure 1A, part of the length of tube member 32 locates adjacent to the floorjoists J that bear on the wall frame F'. As best shown in Figure ID, an upper end of vertical tube member 32 is mounted (e.g. welded) to an underside of the horizontal tube member 20, adjacent to the plate part 16. To stiffen and strengthen each scaffolding frame 12, and to translate and redistribute 0 outbound load to the wall frame F' of the underlying storey, a lower end of the tube member 32 is connected to an opposing end of the tube member 20 via a tubular brace 34, the brace 34 typically being welded to each of the tube members 20 and 32. The degree of downward extension of the extension bar 30 is adjusted at the vertical tube member 32. In this regard, the extension bar 30 is typically snugly received to slide into 5 and out of the hollow section of tube member 32 (or a vice versa arrangement can be employed). An upper end of the extension bar 30 is provided therethrough with a series of spaced apertures 36 (Figure 4B), and these are able to align with a respective one or more apertures 38 (Figure ID) provided towards a lower end of the tube member 32. Then, fasteners in the form of bolts or pins 39 (Figure 1A) can extend and engage between the tube 0 member 32 and the extension bar 30 to releasably lock the extension member against sliding movement. The scaffolding frame 12 also comprises a step-up support 40 arranged at the tube member 32 of the scaffolding frame. The step-up support 40 locates two of the planks 14 of the working platform 10 in side-by-side relationship thereat. The step-up support 40 allows a 25 builder/installer to stand on the planks 14 and thereby safely reach an upper region of the adjacent wall frame F when installing installation or the like. The scaffolding frame 12 is configured such that the planks are positioned away from the building facade so that building materials (including insulation and cladding) can be installed between the scaffolding frame and the building (e.g. wall frame) to maximise the 30 extent of coverage whilst the working platform 10 is in place. This increases the efficiency of installation, improving the install time of materials and related activities, such as cladding, painting, rending, etc. The step-up support 40 comprises an outbound, in-use vertical, tubular post 42 connected (e.g. welded) to extend up from an outbound end of the tube member 32. The 11 step-up support 40 also comprises an inbound, in-use vertical plank stop plate 44 connected (e.g. welded) to extend up from an intermediate location of the tube member 32. The plank stop plate 44 has a hooked-over upper lip 45. A tubular plank-supporting cross member 46 extends between and is e.g. welded at either end to the post 42 and plank stop plate 44. The 5 cross member 46 is in turn further supported by spaced, opposing gussets 48 that are e.g. welded to extend between the tube member 32 and cross member 46. In use, the two planks 14 sit on cross member 46, the planks being located and held between the post 42 and the plank stop plate 44. The lip 45 hooks-over and retains the inbound plank 14 (see Figure 1A). Referring now to Figures 1A to IC, it will be seen that the working platform 10 0 further comprises a rail post assembly 50 for supporting two sets of safety rail pairs in spaced horizontal relation thereat in use. In the of the rail post assembly 50, two hollow upper collars 52A&B are welded onto a post 53, and two hollow lower collars 54A&B are welded onto the post 53. Each collar supports therein a respective rail (not shown), with each rail being retained by a respective adjustable wing bolt 55 as shown. Such rails can extend between 5 respective collars of an adjacent post on an adjacent scaffolding frame 12, as part of the working platform 10. The rails can, independently of the support frame (described below) connect adjacent scaffolding frames 12. The post 53 is of hollow section, and is sized such that it is able to slide into an open upper end of the vertical, tubular post 42, via an optionally adjustable (e.g. post height 0 locking) collar 56. As best shown in Figure 3, a slidable and lockable plank-locking collar 58 is also releasably mounted to the post 53 via a wing bolt 55, with the plank-locking collar 58 comprising an L-shaped plank-holder flange 59 configured for bearing down on and retaining the outbound plank 14 (see Figure 1A). 25 Referring now to Figure 4, it will be seen that the working platform 10 can further comprise an angle wall brace 60. A hollow collar 62 is welded onto the wall brace 60 to enable a lower end of the extension bar 30 to be connected to the wall brace 60 via a bolt or pin 64, whereby the wall brace 60 extends horizontally from the extension bar 30 in use. An in-use vertical flange part 65 of the angle of wall brace 60 comprises a series of holes 66 30 therethrough, which enable a self-tapping fastener (e.g. screw) to be employed to secure the wall brace 60 to studs of the wall frame F'. The wall brace 60 thus helps to transfer and redistribute load, via momentary force vectors passing via the extension bar 30, to the wall frame F' of the underlying storey. Typically the wall brace 60 is sized (i.e. of a length) to span two adjacent studs in the 12 wall frame F' of the underlying storey. This length also enables the wall brace to connect to an in-use lower end of the extension member of an adjacent scaffolding frame 12 that is also suspended at the selected storey (i.e. in a correspondingly spaced manner). The support frame can work separately or together with the interconnected rail post 5 assemblies 50 of the adjacent scaffolding frames 12 to provide an integrated working platform 10. However, in the event of there being obstructions at a lower storey, the working platform 10 can be formed and used without the support frame. When the planks 14 are secured to each of the adjacent scaffolding frames 12, the interconnected scaffolding frames 12, together with the planks 14, further integrate the 0 working platform 10. Thus, the working platform is able to fully meet safe working specifications. The support frame (i.e. the two adjacent extension members 30 and interconnecting wall brace 60) can be connected at the ground and used to manoeuvre the scaffolding frames 12 of the working platform 10 into location at the selected storey, typically via the 5 builders/installers lifting the spaced, interconnected scaffolding frames 12 from the ground level L. Alternatively, each individual scaffolding frame 12 can first be located in place (e.g. by a single user), and then the adjacent scaffolding frames 12 can be interconnected via the rails and wall brace. The planks 14 can then be positioned in place. The interconnected scaffolding frames 12 also better redistribute outbound load placed onto the two scaffold 0 frames in use (e.g. to the adjacent wall frame F'). Once the working platform 10 is securely installed, a user may step out onto the platform from the floor of the selected storey, or may climb up onto the platform using a ground-located ladder. The working platform 10 thereby provides a system for the easy installation of 25 building material, such as materials that are installed 'internally' to external cladding or surface finish. The system can employ the various components as described above. A working platform system can comprise multiple working platforms 10. Each working platform 10 can comprise two or more interconnected scaffolding frames 12. In this regard, the wall braces and safety rails can be adapted accordingly. 30 Such a working platform system is able to be quickly and temporarily located at a selected storey of a multi-storey building, and quickly demounted after use. Multiple working platforms 10 (as set forth above) are typically suspended laterally at and around a perimeter of the selected storey. In operation, the working platform system can be deployed to install material at one 13 or more upper or elevated storeys. This installation may take place before or after a lower storey has had material installed thereat. After installation of the material at the one or more storeys, the working platform system is removed, and cladding of the building can take place. In one mode of operation, the working platform system can be deployed after the 5 bottom storey has been installed. In another mode of operation, the working platform system can be deployed from top storey to bottom storey. This latter mode can avoid damage to the lower storey by the support frame (extension bars 30 and wall brace 60). A non-limiting example of a building material installation methodology will now be 0 provided. Example A construction wrap (sarking) was installed at (i.e. wrapped around) the external wall frame F' of a two-storey building. First, a series of scaffolding frames 12 were lifted into place using respective extension bars 30, and each was suspended at the upper storey of the 5 building by hooking the plate part 16 of each frame over the base plate B of the wall frame F. The spacing of the adjacent pairs of frames 12 was then adjusted so that the extension bars were located in adj acency of the vertical studs of the lower wall frame F'. The flange section 24 of each plate part 16 was then secured to the floor FL of the upper storey by a builder/installer at that storey using self-tapping screws inserted through the 0 apertures 26. Optionally, self-tapping screws were inserted through the apertures 28 of section 18 of each plate part 16, the screws tapping into the base plate B of wall frame F to further secure the scaffolding frames 12 to the upper storey. The wall brace 60 was also connected to the lower end of each of the extension bars 30 using bolts 64. The wall brace was then secured to the vertical studs of the lower wall 25 frame F' via self-tapping screws. However, where installed window frames existed that prevented the use of the wall brace 60 and extension bars 30, then these were detached and removed. In a variation, the wall brace 60 was first connected to the lower end of adjacent extension bars 30 of adjacent scaffolding frames 12 before the frames were lifted into place. 30 This inter-connection formed a support frame which an installer could then use to simultaneously lift and hook the scaffolding frames 12 into place. Once the plate parts 16 were secured to the floor FL and the wall brace 60 was connected to the vertical studs of the frame F', planks 14 were secured to the adjacent frames 12 (i.e. using the plank-locking collar 58). The rail post assemblies 50 were now installed and 14 safety rails positioned and clamped into position. The working platform was now ready to be used to install the insulation material (and optionally other components such as gutter, eaves, etc) at the upper storey of the building. In this regard, the installer was able to step out from the floor onto the planks 14, or climb up to the platform 10 using e.g. a ground-based ladder. 5 After the construction wrap (sarking) was installed (i.e. wrapped around) the external wall frame F of the upper storey of the building, the working platform was demounted (i.e. in reverse order to the aforementioned procedure). The lower storey of the building was then wrapped. This having been completed, the building was now ready for cladding and finishing (e.g. by bricklayers, builders or contractors, etc). 0 In a variation, the external wall frame F of the lower storey of the building was first wrapped, then the working platform was mounted to the next upper storey, and the external wall frame F of the upper storey of the building was then wrapped. The working platform was then demounted. The building was again ready for cladding and finishing. Each such procedure was observed to avoid multiple visits being made by the 5 insulation, scaffolding and cladding installers. The procedure thus simplified and sped-up the entire construction process and allowed the internal trades to commence work earlier, thus facilitating an earlier building completion date. Whilst specific embodiments of the method, apparatus and system have been 0 described, it should be appreciated that the method, apparatus and system may be embodied in other forms. For example, the working platform 10 can be deployed for installing wall insulation batts. The working platform 10 can also be deployed for other construction activities, such as cladding, painting, rendering, plastering, connecting of services, etc. 25 The tube members of the scaffolding frame 12 can be formed from square and rectangular hollow section, round section, etc (e.g. of steel, aluminium, etc). The method, apparatus and system may also be employed for installing building materials at a small section of a building, so that the 'selected storey' should be understood to comprise a 'section' of that storey. 30 In the claims which follow and in the preceding description, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e., to specify 15 the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the method, apparatus and system.