- 1 WALL CONSTRUCTION FIELD OF INVENTION 5 The present invention relates to a building construction system and a method of forming the building construction. In one form, the present invention relates to a building construction system and method for forming a wall of a 10 building construction, particularly an intermediate wall located between two adjacent dwellings. In one form, the present invention relates to a building construction system and method for forming an intermediate 15 wall in the form of a boundary wall, zero boundary wall, dividing wall, such as a party wall or intertenancy wall between two dwellings compliant with the requirements of the Building Code of Australia (BCA) whilst occupying a reduced space. 20 The present invention finds particular application in the formation of a boundary wall, zero boundary wall, party wall or intertenancy wall located intermediate two separate but interconnected living spaces or dwellings, 25 which wall has the required sound reduction rating and/or fire rating level to be compliant with the relevant BCA requirements whilst occupying reduced space between the individual dwellings. 30 Although the present invention will be described with particular reference to one or more embodiments, it is to be noted that the scope of the present invention is not restricted to the described embodiment but rather the scope of the invention is broader so as to include other 35 forms and arrangements of the building construction system and the use of the various forms and arrangements of the 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 2 building construction system for purposes other than described. BACKGROUND OF INVENTION 5 The need for shelter increases along with the increasing population of the world. The need to provide a shelter for increasing numbers of people puts pressure on property developers to provide increased numbers of houses at lower 10 costs occupying less space in order to satisfy the demand for housing at an affordable price. As a result, newer and different methods of construction are required to efficiently build houses, including different types of houses. In many locations, such as in city areas, and 15 inner suburbs, it is now no longer possible to build a single house on a block of land, at least a house which is affordable to the general population. Increasingly, houses are built as partially or fully attached to other houses in which the individual houses are separated by 20 boundary walls, dividing walls or similar, such as for example, as units or similar self-contained living spaces. However, higher density housing, whilst being a more efficient use of the available land at an affordable price, presents additional problems such as sound 25 transmission through walls which are common to adjacent units and/or fire transmission through the common walls or closely spaced walls of adjacent units in the event that there is a fire in one of the units of the multi-unit buildings. As property developers strive to be able to 30 build increasingly larger numbers of units in the same space or on the same block or area of land, the spacing between adjacent units becomes less, leading to an increase in sound transmission from one unit to an adjacent unit and/or additionally increasing the chance of 35 fire being propagated through the boundary or dividing wall intermediate the two units. 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 3 Therefore, there is a need for high density units having sound transmission and/or fire rating values compliant with the relevant building regulations, such as the 5 relevant Building Code of Australia (BCA) requirements, which are built or located closer together, such as by having a reduced space between adjacent units, more particularly between facing walls located between the adjacent units. 10 Surprisingly, it has now been discovered that it is possible to reduce the transmission of sound between adjacent units and at the same time reduce the gap between adjacent units to save space which is counter intuitive as 15 the accepted wisdom is that the smaller the spacing between adjacent units, the greater the transmission of sounds and noise. Accordingly, it is an aim of the present invention to 20 provide a building construction system in which the gap or spacing between adjacent living units of either side of an intermediate wall is reduced to enable more units to be constructed per area of land whilst the building construction system and method is compliant with the BCA 25 requirements relevant to sound transmission, fire transmission and/or similar. Accordingly, it is an aim of the present invention to provide a building construction system and a method of 30 forming a building construction which has a gap or spacing between adjacent living spaces on either side of an intermediate wall that is smaller than previously thought possible whilst still remaining compliant of the relevant BCA regulations. 35 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC -4 SUMMARY OF INVENTION According to one form of the present invention there is provided a wall structure located intermediate a first 5 dwelling unit and a second dwelling unit, the first and second dwelling units being located adjacent one another on either side of the wall structure, the wall structure comprising a first wall section including a first panel wall and a first support wall, the first support wall for 10 supporting the first panel wall, and a second wall section including a second panel wall and a second support wall, the second support wall for supporting the second panel wall, the first panel wall and the second panel wall being located in spaced apart opposed face-to-face relationship 15 to each other to define a gap therebetween, the gap forming part of the wall structure, wherein the first panel wall or the second panel wall or the first and second panel walls are formed from individual panels which are arranged to extend in edge-to-edge relationship to 20 extend substantially in a direction in alignment with the direction of the height of the wall structure or to extend in a direction substantially transverse to the direction of the height of the wall structure. 25 One form of the wall structure can be constructed using different methods. In one form, there is a method of constructing an intermediate wall between two adjacent dwellings, said method comprising constructing a first wall section having a first wall support and a first wall 30 panel, the first wall support for supporting the first wall panel at a position with respect to the intermediate wall and the first wall panel forming a first part of the intermediate wall between the two dwellings, constructing a second wall section having a second wall support and a 35 second wall panel, the second wall support for supporting the second wall panel with respect to the first wall panel 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 5 and the second wall panel for forming a second part of the intermediate wall between the two dwellings, the first wall panel and the second wall panel when formed, being located in spaced apart opposed face-to-face relationship 5 with one another to define a gap therebetween, said gap forming part of the intermediate wall, wherein the first wall panel or the second wall panel or both the first and second wall panel include individual panels which are arranged in edge-to-edge relationship to extend either 10 substantially vertically or substantially horizontally of the wall structure. BRIEF DESCRIPTION OF EMBODIMENTS 15 In one form, the dwellings are houses, semi-detached houses, units, apartments, flats, condominiums or other such dwellings or living spaces. Typically, the units etc are arranged in multiples in a form of a construction having the appearance of a single building or similar. 20 The units may be a single storey of units, two stories of units, or multiple stories, such as an apartment block of multiple rows and columns of units, or the like. In one form, the building housing the individual units is 25 divided into separate living spaces or dwellings by common boundaries in the form of dividing walls. In one form, the units are detached or semi-detached houses, typically having a boundary wall, zero boundary or 30 party wall, and more typically, having one or more parts common to two or more houses. In one form, the intermediate wall is a common or dividing wall, typically a party wall or intertenancy wall located 35 between respective adjacent units or dwellings. In one form, the intermediate wall is a boundary wall or zero 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 6 boundary wall. In one form, the intermediate wall is a party wall or intertenancy wall. In one form, the intermediate wall includes two wall 5 sections separated by a gap or space therebetween, in which one wall section is associated with one unit, and the second wall section associated with the adjacent unit. In one form, the, or each wall section includes a support wall portion and an infill wall portion forming the cover 10 or facade of the wall. In one form, the first dwelling shares a common wall with one, two or three adjacent dwellings such that the first dwelling could have two dividing walls located on opposite 15 sides of the dwelling or on adjacent sides of the dwelling or could have three common walls in the event that the dwelling is located back to back with another dwelling in addition to being located side to side with a dwelling on the left hand side and/or a dwelling on the right hand 20 side. Typically, each intermediate wall in the form of a boundary, common or dividing wall of the one dwelling has a first wall section in which the first wall section 25 includes a first wall panel and a first wall support. In one form, the first wall support is a stud wall or other structural wall for supporting the panel wall or similar of the dwelling. Typically, the support wall is a 30 wall made from timber or steel stud frames or framework members, typically in the form of a stud wall having vertical posts and/or horizontal noggins or similar. In one form, the wall panel is a building panel, typically 35 a lightweight panel such as an aerated panel, more typically an aerated autoclaved concrete panel (AAC), 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 7 preferably marketed under the HEBEL@ trade mark by CSR Building Products Limited. In one form, the wall panels are HEBEL@ panels, which can 5 vary in thickness from about 50mm to about 350mm with panels of 50mm, 75mm or 100mm being particularly preferred, with panels of 50mm or 75mm being the most preferred. The panels can be up to about 6 metres in length, preferably about 4800mm in length, and up to about 10 600mm in width, preferably 300mm, 450mm or 600mm in width. Particularly preferred dimensions for length are 3000mm, 3300mm, 4800mm or 6000mm, and for width are 300mm, 450mm or 600mm. 15 In one form, the panel is a lightweight AAC panel. It is to be noted that the panel can have any form, shape, size, profile, thickness or similar to suit the requirements of the property developer or building in which the panel is to be installed. In one form, the shape is a solid 20 parallelepiped, rectangular prism, rectangular parallelepiped, cuboid or the like. In one form, the panels are generally of a cuboid, rectangular prism or parallelepiped shape, having a length 25 greater than the width, both of which are considerably greater than the thickness of the panels. One form of the panels are provided with reinforcing, such as in the form of embedded mesh, rods, wire, or the like. Additionally, the panels can be matingly engageable elements along the 30 lengthwise extending edges, such as for example, being provided with a tongue and groove arrangement along the long edges for matingly engaging with each other. In one form, the panels are arranged so that the longer 35 sides extend vertically whereas in other forms, the longer sides of the panel extend horizontally. In one form, the 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 8 panels can be located one on top of the other in edge to edge relationship to span the height of the building, preferably with the tongue and groove arrangement in mating connection to assist in maintaining the position of 5 the panels with respect to each other. Both configurations of the panels are employed in the building construction system of the present invention. In one form, the wall panels have an interior facing 10 surface or face facing into the interior of the dwelling or unit when installed as part of the intermediate wall, either the boundary wall or dividing wall, and an outwardly facing surface or face, facing outwardly of the dwelling so as to face a similar panel of the wall section 15 forming the other part of the intermediate wall. The spacing of the gap between the panels is measured as the distance between respective outwardly facing faces or surfaces of the panel, i.e. the faces or surfaces facing each other. 20 In one form, the support framework of studs is securely fastened to the inwardly facing surface or face of the panel, typically using connectors, such as for example, in the form of fixing brackets, more particularly right 25 angled fixing brackets. In one form, the right angled fixing brackets have one arm secured to the side of the studs forming the support wall and the other arm of the bracket being secured to the inner face of the panel. In one form, the bracket may be either alternatively or 30 additionally secured to the top and/or bottom plate of the stud frame wall. It is to be noted that any suitable connector can be used. In one form, the outwardly facing surfaces or faces of the 35 two wall panels are in opposed face-to-face relationship to each other by the two outwardly facing surfaces facing 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 9 one another from either side of the intermediate wall. The gap defined by the panels when in spaced apart face to-face relationship forming the intermediate wall is the 5 gap between the outwardly facing surfaces or faces of the respective wall panels. In one form, a resilient material is located within the gap between the first wall panel and the second wall 10 panel, typically in contact with the first wall panel and the second wall panel. Typically, the resilient material forms part of the intermediate wall, more typically, the central part of the wall. 15 In one form, the resilient material located in the gap between the two wall panels is a bead or dab or line or strip or other shape or profile of a suitable elastomeric or resilient material. In one form, the resilient material is a sealant, particularly in the form of a bead 20 of sealant. Any suitable material may be used. In one form, the bead of sealant is randomly located between the two faces of the respective wall panels whereas in other forms, the location of the sealant is in 25 a regular repeating pattern or similar such as around the edges of the respective panels to maintain the gap between the panels. The resilient material may take any suitable form or be of 30 any suitable type and includes a line or extrusion of elastomeric material, a gasket, a rubber strip, a plastic strip, a spacer strip, a rib, a ridge, or the like, preferably made from an elastically deformable material, including any flexible sealant that provides an 35 acoustically resilient connection between the AAC wall panels when in face-to-face relationship. 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 10 Typically, the thickness of the layer, strip, bead, length or similar of resilient material is up to about 10mm, more typically up to about 8mm, even more typically up to about 5 5mm, and up to about 3mm, so as to maintain spacing apart of the respective panels to be up to about 10mm. It is to be noted that the spacing apart of the panels is measured between opposed faces facing each other across the gap. 10 The amount of resilient or elastomeric material, in whatever form, is applied to either the first wall panel, or to the second wall panel, or to both wall panels, or into the gap between the two wall panels, in order to produce or maintain the spacing between the two panels. 15 It is to be noted that although the gap between the two wall panels is considerably less than the gap traditionally used in the intermediate wall of multi-unit buildings, the smaller gap of the construction system of 20 the present invention complies with the relevant building requirements, such as the relevant BCA, in respect of sound transmission, fire transmission or similar so that the construction system has the required rating, including having a sound reduction rating of Rw+Ctr 50 and/or a 25 fire rating level (FRL) of a minimum 60/60/60, in which the following definitions apply: o Rw - Weighted Sound Reduction Index - defines the acoustic performance for speech frequencies. Rw 30 is a number used to rate the effectiveness of a soundproofing system or material. Increasing the Rw by one translates to a reduction of approximately 1db in noise level. Therefore, the higher the Rw number, the better a sound 35 insulator it will be. 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 11 o Ctr - is an adjustment/correction factor which is used to account for low frequency i.e. traffic noise, sub-woofers etc. Ctr is always a negative number, so the Rw+Ctr will always be less than 5 the Rw value. o FRL - Fire Rating Level - measured in minutes, this is the resistance of a building element when exposed to fire. Expressed as 3 numbers: 10 Structural Adequacy/Integrity/ Insulation i.e 180/120/60, that is: " The element is stable and will not collapse when loaded for a period of 180 minutes 15 Structural Adequacy, " The element (including its joints) will restrict the passage of flame and hot gases for a period of 120 minutes - Integrity, 20 " The element will restrict the temperature rise on the non-fire side of the element to a defined maximum temperature at a period of 60 minutes (as defined by the BCA and 25 relevant standards) - Insulation In one form, the construction of the intermediate wall in the form of the party wall or intertenancy wall is a discontinuous construction, preferably of a discontinuous 30 construction as specified in the relevant building codes, such as for example, the relevant BCA clauses including Clauses 3.8.6.2 and Table 3.8.6.1. It is to be noted that the use of the term "discontinuous 35 construction" refers to the outer surfaces of the two wall panels facing each other on either side of the 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 12 intermediate wall, such as the dividing wall, boundary wall, or similar wall, not being connected to one another or not touching one another, except perhaps around the edges of the panels, more particularly except along the 5 upper and lower edges of the panels, corresponding respectively to the floor of the dwellings and of the ceilings or roofs of the dwellings. BRIEF DESCRIPTION OF DRAWINGS 10 Embodiments of one form of the building construction system will now be described by way of example of the invention with reference to the accompanying drawings in which: 15 Figure 1 is a schematic partial side vertical cross sectional view of one form of the building construction system located between two dwellings, 20 Figure 2 is a fragmentary schematic cross-sectional view of another form of the building construction system, and Figure 3 is an enlarged schematic cross-sectional view of the form of the building construction system illustrated 25 in circle "A" of Figure 1. DETAILED DESCRIPTION OF A SPECIFIC EMBODIMENT In Figure 1 there is shown one form of a full height 30 cross-sectional view of part of a typical two storey dwelling construction incorporating a dividing common wall in accordance with the present invention separating the building into two adjacent units. 35 Building, generally denoted as 10, comprises a first dwelling, hereinafter referred to as dwelling one, 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 13 generally denoted as 12, and a second dwelling hereinafter referred to as dwelling two, generally denoted as 14. Both dwellings 12, 14 are provided with respective roofs, 16a, 16b, such as for example, a tiled roof or a metal 5 roof in the form of corrugated sheets or similar, generally denoted as 16. Roof 16 can have any suitable or convenient construction, including roof bearers 18 and battens 20 for supporting tiles, metal sheets 22 or similar. Flashing in the form of a cap 24 is provided 10 over the top edge of dividing wall, generally denoted as 30. Cap 24 can be made of any suitable shape or profile to fit over the upper end of dividing wall 30. A roof cavity 32 is provided intermediate roof 16 and ceiling 34. In one form, roof cavity 32 of both dwellings one 12, and 15 two, 14, are formed by half roof trusses 36a, 36b, generally denoted as 36. It is to be noted that the roof space or roof cavity or ceiling cavity 32 is formed from the individual framework members arranged to form roof truss 36. In the form of the building shown in Figure 1, 20 there are two half trussed roofs mounted to either side of dividing wall 30, whereby one half trussed roof 36a is associated with dwelling one and the other half trussed roof 36b is associated with dwelling two so that the roof 16 of building 10 is a gable roof or similar sloping roof. 25 A building having an alternative roof structure is shown in Figure 2, which in this form, is a flat roof structure 38, in which the flat profile of the roof is interrupted by the common dividing wall 30 protruding above the level 30 of the flat roof such as a parapet or similar. In this embodiment, flashing in the form of a cap 40 is fitted over the upper end of dividing wall 30 to provide weather protection and sealing of the dividing wall. Apart from the shape and type of roofs being different, the 35 construction of the dividing wall in the embodiment of Figure 1 is substantially the same as the construction of 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 14 the embodiment of Figure 2. In one form, both dwelling one 12, and dwelling two 14, are constructed as separate but connected two storey 5 units, having an upper floor 42 and a lower floor 43 separated by flooring in the form of a floor joist 45 which forms the floor of the upper storey 42 and ceiling of the lower storey 43. 10 One form of common dividing wall 30 will now be described in detail with reference to the drawings. It is to be noted that the intermediate wall can have any suitable form, such as a boundary wall, zero boundary wall or the like. 15 Dividing wall 30 partially comprises two rectangular wall panels 44a, 44b, typically wall panels made and supplied as HEBEL@ AAC panels, preferably 75mm thick HEBEL@ POWERPANEL@ made by CSR Building Products Limited, 20 arranged to extend vertically. In other forms, panels 44a, 44b are arranged to extend horizontally. Panels 44a, 44b, are located in spaced apart opposed face-to-face relationship with each other such that their respective outwardly facing surfaces or outer faces of the two panels 25 face one another at either side of dividing wall 30. A gap 48 is located between two wall panels 44a, 44b to form a further part of dividing wall 30. The wall panel 44a of dwelling one, 12, is attached to a support wall 50a in the form of a timber or steel stud wall frames for supporting 30 wall panel 44a. The support wall is generally denoted as 50. Support wall 50a is connected to wall panel 44a by suitable fixing brackets such as for example, right angle brackets 52 in which one arm of bracket 52 is securely fastened to the side of one of the vertical studs forming 35 support wall 50a and the other arm of bracket 52 is secured to the inwardly directed face of wall panel 44a 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 15 which is the face or surface in contact with the studs of support wall 50a. In another form, the arms of the brackets are securely 5 fastened to the top or bottom or both plates of the stud frame wall (not illustrated), so that panel 44a is in contact with the top and bottom plate of the stud wall frame. Any number of similar fixing brackets 52 can be used to connect wall panels 44a to the stud frames of wall 10 support 50 as is required depending on the size and type of the building and its location. A similar arrangement is provided with dwelling two, 14, which is also provided with a wall panel 44b, typically a 15 75mm HEBEL@ POWERPANEL@ fixedly connected to a stud wall 50b. Two panels are separated by gap 48 which has a maximum distance of about 10mm measured from one outer face to another outer face. However, it is to be noted that gap 48 can vary within limits up to 10mm to comply 20 with the relevant BCA regulations and the requirements of the developer, preferably up to about 5mm. Gap 48 may be formed or retained by any suitable or convenient means. In one form, the maximum 10mm gap 25 between wall panels 44a, 44b is formed by locating an amount of resilient material in gap 48 in contact with both panels 44a, 44b. In one form, the resilient material is located in the gap by applying the resilient material in the form of a bead or length, strip or dab of flexible 30 sealant between the two wall panels. The flexible sealant can either form the gap between the panels or can maintain the existing gap between the panels by preventing the panels from touching one another except around the edges of the panels in some circumstances, such as to form a 35 discontinuous construction. 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 16 In one form, wall panels 44a, 44b may extend the entire height of dividing wall 30. In other embodiments, the wall panels are stacked one upon the other in edge-to-edge relationship, extend to the entire height of building 10 5 so that there are two or more panels. In other forms, one panel may extend to the height of the lower floor or storey 43, and another panel may extend to the height of the upper floor or storey 42 so that there are two panels in edge-to-edge relationship. It is to be noted that any 10 combination of panels can be used to form both wall panels. Alternately wall panels 44a, 44b, generally denoted as 44, can be arranged to extend horizontally. It is to be noted 15 that any combination of vertically oriented panels, horizontally oriented panels, and combinations of both horizontally oriented and vertically oriented panels are possible. 20 One form of the method of constructing the building construction system of the present invention will now be described. Initially, a concrete slab 60, is formed as the foundation 25 and optionally the floor of lower storey 45 of dwelling one, 12, such as by pouring concrete in the traditional or conventional manner to form slab 60 as the foundation of dwelling one. 30 It is to be noted that a first slab 60 may be constructed so as to provide foundation for dwelling one 12, only, and a second slab 60 constructed to provide foundation for dwelling two, 14 only, or slab 60 may be monolithically poured to form a slab that is shared communally by 35 dwelling one 12, and dwelling two 14, such as is shown in Figure 1 where slab 60 has a greater thickness immediately 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 17 below dividing wall 30. The walls other than the dividing wall 30, floor and roof framing of dwelling one is then constructed on slab 60 5 before commencing or simultaneously with commencing constructions of dividing wall 30. The construction of dividing wall 30 includes forming wall support 50a in the form of a stud wall constructed near to the common boundary of dwelling one 12, and dwelling two 14. If 10 required, wall support 50 can be stabilised by being braced, such as for example, using suitable props or braces, including removable props or adjustable props. The first wall panel 44a associated with dwelling one 12, 15 typically in the form of a HEBEL@ 75mm POWERPANEL@, is then located either vertically or horizontally oriented members adjacent support wall 50 and then directly fixed to frame members of support wall 50 via suitable fixing brackets, such as right angled brackets 52 to form one 20 side of dividing wall 30. Insulation (not shown) is then installed by being packed into the timber frame cavity formed in the spaces of support wall 50 by the spaced apart studs, noggins, if 25 fitted and other fittings as required and specified. When appropriate, an internal wall covering such as for example, sheets of plasterboard wall lining are attached to support wall 50, after first removing the optional props to complete construction of dwelling one and the 30 unit is then finished to lock up stage. If dwelling two is not to be constructed directly following the completion of dwelling one, then the external wall of dwelling one should be appropriately 35 coated to ensure weather tightness of the wall until the construction of dwelling two can commence. Dwelling one 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 18 wall is then finished internally to complete construction of the first part of the dividing wall in the form of a party wall. 5 Dwelling two may commence construction at any time after the completion of dwelling one as required by the property developer or construction schedule. An amount of a resilient material, such as for example, in 10 the form of a bead or strip of flexible sealant or a gasket of resilient material, is applied to the outwardly facing surface or face of wall panel 44a of dwelling one, 12, either in blotches, dabs or in horizontal or vertical strips or beads. Wall panel 44b of dwelling two, 14, is 15 then located near to and in alignment with wall panel 44a of dwelling one and then accurately located onto the sealant directly against wall panel 44a in alignment with wall panel 44a. Wall panel 44b is then propped into position until the stud frame wall 50b of dwelling two, 20 14, is installed and wall panel 44b fixed to this frame. Thus, wall panels 44a, 44b are assembled in face-to-face spaced apart relationship to each other with the resilient material located in the gap therebetween. 25 The wall, floor and roof framing of dwelling two is then constructed around wall panel 44b which is in place in spaced apart face-to-face relationship with wall panel 44a, and wall panel 44b connected to the wall frame 50b 30 using the required number of fixing brackets 52. The optional props are then removed and insulation installed into the timber frame cavity formed by wall support 50b (as required and specified) and plasterboard 35 wall linings attached to the inside face or surface of wall support 50b of dwelling two, 14, to finish the 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 19 construction of dividing wall 30. The internal walls of dwelling two are then finished as required or specified. It is to be noted that the sequence of construction of 5 adjacent dwellings may be simultaneous, and/or staged or as noted above so that if a third dwelling, referred to as dwelling three, is to be built adjacent dwelling one, dwelling three is built using the same steps as dwelling two. 10 Further, it is to be noted that any other form of propping, such as for example, fastening, typically screwing wall panel 44b into wall panel 44a temporarily in lieu of props and then removing the screws from both wall 15 panels 44a, 44b, could be used to construct the walls of the dwellings, including boundary walls. ADVANTAGES OF THE INVENTION 20 Embodiments of the wall constructions in accordance with the present invention include the following: * The dwellings are buildable. * The overall thickness of the wall is reduced in 25 comparison to previous available walls, particularly dividing walls. e The construction is cost effective, relatively quicker and easier to install. 30 The described arrangement has been advanced by explanation and many modifications may be made without departing from the spirit and scope of the invention which includes every novel feature and novel combination of features herein disclosed. 35 Those skilled in the art will appreciate that the 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC - 20 invention described herein is susceptible to variations and modifications other than those specifically described. It is understood that the invention includes all such variations and modifications which fall within the spirit 5 and scope. 9/11/15 7100173_1 (GHMatters) P94722.AU.1 JMC