AU2010200032A1 - Wall lining - Google Patents

Abstract

- 17 Abstract A wall lining comprising a lining body formed of an amorphous cementious or material that provides an insulative characteristic and includes at least one outer surface allowing for application of a decorative feature. 8-14mm 6-8mm - 8-14mm 6-8mm Figure 4

Description

Regulation 3.2 AUSTRALIA Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT APPLICANT: Mr Adnan A. Dennaoui INVENTION TITLE: WALL LINING The following statement is a full description of this invention, including the best method of performing it known to me: - -2 WALL LINING 5 Field of the Invention This invention relates to a wall lining and in particular to a wall lining system that uses boards or panels. 10 Background to the Invention Rendering of walls is a usual practice for internal and external walls including fences and other structures. Renders are traditionally applied to give protection to walls built of poor quality or porous 15 brick or to walls in exposed locations facing driving winds. They help by acting like a sponge, absorbing rainfall then allowing it to evaporate rather than soak into the wall. Most houses built of rubble stone would have been rendered originally and they tend to suffer from penetrating damp if the lime render is removed or replaced with a cement rich render. 20 There is a very wide range of types of rendering. walls of many buildings were often treated with just a single coat of render, amounting to not much more than a very full, flush pointing. Such a render is thicker in the hollows and very thin over the brick or stone faces. There was no attempt to create a flat surface so the undulations of the wall and even some of the stones themselves were not concealed. For a smarter finish or on more prestigious 25 buildings the aim would be for a more uniform render achieved by applying a scratch coat to fill the hollows and take up some of the unevenness followed by one or two more coats which are worked to a flatter surface. For masonry, it is necessary to thoroughly wet the wall with clean water using a hose-pipe 30 or sprayer. The more porous the background the more water will be required. Allow the water to soak in a bit then spray again, and repeat until the surface layers of the wall are thoroughly damp. When the render is applied the wall should be damp but without water glistening on the surface. 35 There are many different ways to apply render depending on the type of finish required, the type of render used and the preference and experience of the person applying it.

-3 Wet renders must be applied using as much pressure as possible to force the mortar into the surface crevices to form a close contact between mortar and backing. For masonry walls, whilst it is possible to apply render using a plasterer's trowel the best result is achieved by throwing the mortar on from a trowel. This technique ensures the best bond 5 between the mortar and the wall, expels any air in the mix and ensures that the mortar is well compacted. It doesn't matter if the first coat goes on rather unevenly as you can remove any excess mortar by running the edge of a trowel over the surface to cut off the rough bits. 10 There are two schools of thought regarding when to apply the second coat. Some practitioners advocate applying the second and subsequent coats whilst the previous coat is still 'green' or 'leather hard', that is after it has firmed up sufficiently to resist indentation with a thumb but is still soft enough to scratch with a finger nail and is still damp. This varies according to drying conditions. For internal plaster it may be anything up to a week or so 15 between coats. This method requires less dampening of the surface before application of the second coat and may achieve a better bond between coats. However, there is a risk that there might be further shrinkage in the base coat after the second coat has been applied, and it will take a lot longer for the undercoats to fully carbonate and achieve full strength. The alternative approach is to allow the base coat to dry out slowly. The work should be 20 protected from drying out too quickly Always ensure that the previous coat is damp before applying the next one. The final appearance depends on the type of mortar used for the top coat and the tools used to finish it. It can therefore be seen that the art of rendering is complicated and can result in uneven 25 results. Further there is clearly a large level of workload in applying multiple layers of material to form a rendered surface. Still further is that each layer can have different and faulty adhesion effectiveness to the layer below dependent on material, technique and timing. It is therefore beneficial to have an improved system. 30 Dry lining is a generic term applied to the use of plasterboard or cementious sheeting or the like on timber or metal frames as a replacement to conventional wet building practices where rendering of brick or block by plaster or other render would be specified. The term dry lining strictly applies to the use of plasterboard to replace a sand and cement or wet plaster finish to internal or external blockwork. 35 -4 The main advantages of dry lining relate to the speed of installation and lower imposed water loadings on a building. Other advantages include the fact that the use of lightweight partitions will result in a lighter building with consequent benefits in the specification of the foundations, together with greater flexibility in designing and changing the internal shape of 5 the house as a family's needs change. Because of the pre-finished nature of most board systems, drylining can often be undertaken by do-it-yourself builders, thus offering potential savings in the overall cost of the build. However generally drylining results in a flat product that might still require two layers of rendering if a rough textured look is required. 10 Accordingly, it is an object of the present invention to overcome or substantially ameliorate one or more of the disadvantages of the prior art. Summary of the Invention In accordance with the invention there is provided a wall lining comprising a lining body 15 formed of an amorphous cementious or material that provides an insulative characteristic and includes at least one outer surface allowing for application of a decorative feature. The at least one outer surface can be of a material that provides a supporting stabilising and substantially planar surface. 20 In one form the decorative feature is formed by an uneven tactile surface. The uneven tactile surface can be formed by a combination of predefined regular arrangement and an intermediate non-predefined irregular arrangement whereby the uneven tactile surface falls within a range of variable surface simulating a partially rendered textured surface. 25 The lining body can be formed of cementitious material or MgO or other amorphous granular structure. In another form the lining body is formed of a micro void forming material such as 30 polystyrene, foam or other material that increases insulation due to its structure. The lining body can be shaped to form an outer shape which receives material in an inner void that increases the insulative characteristics. A wall lining body could be U-shaped. 35 In accordance with a particular form of the invention there is provided a wall lining comprising: a lining body; with on at least one outer surface an embedded cross linked member forming a membrane with a weave spacing; whereby the moulding of the wall lining -5 body forms at least a partial extrusion of material between the weave to provide a consistently rough outer surface such that the wall lining provides at least a partially pre rendered outer surface. 5 The cross linked member can be a cross weave having substantially between 3 to 12 millimetre weave gap with the extrusion through the weave being greater than the thickness of the cross linked member and less than 50% of the spacing of the weave. In a particularly preferred form the invention provides a wall lining formed in substantially 10 planar sheets, panels or tiles for mounting to a structure to form a textured wall surface comprising: a. a lining body formed of MgO, glass material or cementious material; b. with on at least one outer surface an embedded weather and fire resistant cross linked member forming a membrane with a weave spacing of about 5 millimetres in two 15 orthogonal directions; c. an outer surface formed of the smooth substantially planar cross linked member and a partial extrusion of material between the membrane weave of the cross linked member to provide a consistently rough surface; whereby the wall lining provides at least a partially pre-rendered surface. 20 It can be seen that the present invention provides a wall liming is to provide an internal or external wall lining board or panel that is applied to form walls and ceilings. The board is preferably formed of MgO board, or other cement sheeting material with a pre 25 render finish, other MgO boards do not. The board includes a fibre mesh integrated in the board. A wall lining board could include any one or more of the following: 30 a. a layer of material within the lining body to improve insulation; b. a layer of material attached to the lining body to improve insulation; c. a U-shaped body for receiving a further material d. a layer of material forming a partially rendered surface e. a covering layer extending beyond the lining body and/or recessed from the 35 end of the lining body to allow interfitting of multiple wall lining boards and continuous covering layer; and -6 f. a covering layer and lining body having mitred edges to allow interfitting of multiple wall lining boards and continuous covering layer. The invention therefore provides a unique / novel product with a rough textured- render 5 finish. All other MgO boards have a much smoother finish. This allows trades person (plasterers etc) to need to apply only one coat render application to form a rendered surface. This provides a cost effective solution to rendering applications for homes/commercial building. 10 The wall lining can be an 8mm Ezy-Lite Board has a Fire Rating of 1hr and 40 min. (The full scale fire test was conducted by Exova Warrington Fire P/L, where a 3.0 x 3.0 timber framed wall was built and cladded with Ezy-Lite Board. The test ran for 1 hr and 40min at temperature exceeding 1200 Deg Cel. Ezy-Lite Boards has been rated by the Building Commission as a BAL 40 which makes Ezy-Lite Board a cladding board that can 15 be used in the highest and extreme fire zone. Ezy-Lite Board has no limit of use whether Bush Fire Zone or freezing temperatures, our product delivers where others fail, without swelling, shrinking, delaminating and reduced to ashes. Some ideal use can be, external or internal lining, tile underlay, feature walls, eave lining, 20 fire rated walls, acoustic walls. Brief Description of the Drawings In order that the invention is more readily understood embodiments will be described by way of example only with reference to the drawings wherein: 25 Figure 1 is a photographic view of a pre-rendered wall lining in accordance with a first embodiment of the invention; Figure 2 is a planar overhead diagrammatic view of the wall lining of Figure 1; Figure 3 is a cross sectional diagrammatic view of the wall lining of Figure 1; Figure 4 is a diagrammatic side view of various pieces of the wall lining of Figure 1 in 30 different thicknesses with top and bottom coverings and showing a linear interengagement to form a continuous outer treated surface; Figure 5 is a diagrammatic side view of various pieces of the wall lining of Figure 1 in different thicknesses with top and bottom coverings and showing a rectilinear interengagement to form a continuous outer treated surface by use of diagonal 35 interengagement surfaces; -7 Figure 6 is a diagrammatic side view of various pieces of the wall lining of Figure 1 in different thicknesses with top and bottom coverings and showing a rectilinear interengagement to form a continuous outer treated surface by protruding outer surfaces; Figure 7 is a photographic view of a wall lining with a modified polystyrene inner U 5 shaped body but pre-rendered outer surface in accordance with a second embodiment; Figure 8 is a photographic view of a wall lining with a modified polystyrene body but pre-rendered single outer surface in accordance with a third embodiment; Figures 9 and 10 show diagrammatic joining and mounting of embodiments of the invention. 10 Description of a Preferred Embodiment of the Invention Referring to the drawings there is shown in Figures 1 to 4 a particularly preferred form of the invention provides a wall lining 21 formed in substantially planar sheets, panels or tiles for mounting to a structure to form a textured wall surface. The wall lining 21 includes a lining 15 body 22 formed of MgO, glass material or cementious material. on at least one outer surface an embedded weather and fire resistant cross linked member 23 forming a membrane with a weave spacing of about 5 millimetres in two orthogonal directions. An outer surface 24 is formed of the smooth substantially planar cross linked member and a partial extrusion of material from the lining body 22 between the membrane weave of the 20 cross linked member 23 to provide a consistently rough surface whereby the wall lining provides at least a partially pre-rendered surface. In this preferred embodiment, the invention provides a range of wall lining products and sizes including: Product Size: W x L x T Description Use Ezy-Lite' m 1220 x 2440 50 - Ezy-Liter m board Internal partition wall panel 150mm outer lining Exterior Lining 1220 x 2700 Inner core Feature landscape 1220 x Polystyrene wall 3000 Made to order Ezy-Lite" 1220 x 2440 6 - Thickness from 4 - Use internal, external Board 8mm 25mm wall lining,tile 1220 x 2700 Standard lining board underlay, eave lining, 1220 x 3000 8mm and flooring board. Ezy-Lite 1220 x 2440 8mm Ezy-Lite Tm board with External wall lining, Wood Grain wood grain surface fencing and gable fill Board finish Ezy-Lite m 1220 x 2440 8 - Ezy-Lite m Board with External wall, fence, Pre-Render 10mm render finish and feature wall lining 1220 x 2700 board 1220 x 3000 Ezy-Lite 950 x length from 2 - Color roof sheet top Full span lining of Roof 6m inner roof insulated and Thickness 50 - Polystyrene and Ezy- lined 100mm Lite board finish lining see span table or color zinc Ezy-Lite m 1220 x 8mm Ezy-Lite m Ideal for external SingleSide 2400 Board outer with clading, feature Panel 1220 x Polystyrene fence. 2700 1220 x 3000 60 150mm Ezy-Lite m 600 x 600 x 6 - 8mm Ezy-Lite m Board with Ceiling for office, Ceiling Tiles special size available different type restaurant, schools, patterns hotels, apartments, theaters, and much more Ezy-Lite Tm Board Ezy-Lite

T

" Board is a unique material with many use whether internally or externally without any special surface treatment. Ezy-Lite Tm Board can be used as internal wall cladding, tile 5 underlay, exterior wall lining, eave lining board, and decorative features. Architects can now implicate into designs a unique board with great flexibility and strength where special design -9 features are required without the use of heavy construction panels for strength and fragile boards for flexibility. Ezy-Lite Tm Board meets all Australian Standards for Fire, Water, Insect, Impact and Mold 5 resistant with the flexibility of plaster and the strength of Ply sheeting. Ezy-LiteTm Board used as replacement of particle boards flooring with the advantage of being water proof, acoustic, insulated, fire proof, anti mould, termite resistant and easy to cut and lay. The use of e as flooring eliminates the use if different types of materials for 10 tiling, insulating and protecting from fire and termites. Water proofing requires special type of cement board with expensive surface treatment applied to protect, using a 14mm Ezy-Lite Tm Board provides all the needs to protect against rot, fire, mould and termite without any surface treatment. The use of Ezy-Lite Tm Board as 15 a flooring saves on labour and additional material cost providing a lifetime protection against any conditions where other materials had failed. Ezy-Lite Tm Panel. Ezy-Lite T M panel is made from two layers of Ezy-Lite Tm Boards, one on each face with 20 Polystyrene inner which can be of any thickness ranging from 50 - 200mm depending on the customers request. The Panel can also be made with one E board on face with Polystyrene backing, this panel is ideal for external wall cladding or fence wall with timber frame. The pictures below shows different types of wall panels and boards available at any thickness requested. 25 Ezy-Lite Tm Grain Board Ezy-LiteTm Grain Board is the only board available on today's market, the board can now be used for different facade of buildings, houses or any project with the look of timber reality is required but without the regular maintenance of timber from decay. 30 Ezy-LiteTm Pre Rendered Board The Ezy-Lite Tm Pre Rendered Board is a unique board which has a rendered surface moulded into the board rather than applied to, this method provides a strength in the render coating and a strong base for any applications. The Board can be used as a tile underlay, 35 rendered wall, feature fence, culture stone base, or any base board for any applications. Ezy-Lite Tm Pre Rendered Board can be painted on direct or rendered with one coat of - 10 Acrylic render, for painting apply an undercoat before painting. Render can be applied direct without any base coat, and for tiling use standard tile adhesive. Ezy-Lite Tm Ceiling Tiles 5 Ezy-Lite Tm Ceiling Tiles are the new product on the market for commercial use, the tiles are light weight with the advantages of Fire resistant, water proof, Acoustic, thermal rating, dose not mould, or swell. The tile is available in many designs and finish, i.e. matt, shine or gloss finish, which gives provide looks as well as safety. 10 The uses of the wall lining of the invention include use on exterior of house which can be cladded with Ezy-Lite panels and eaves with Ezy-Lite boards. Also the fence can use the pre-rendered wall lining. Further tiles can be laid on Ezy-Lite Board with standard tile adhesive. 15 Panels, no matter what type of design of building or construction, the panels make the construction stage easier. Different projects using Ezy-Lite TM panels and Boards, include a wall lined with stacking stones the under lay used was Ezy-Lite T M Board with the use of external tile adhesive. A wall lined with Ezy-Lite T M Panel and a window sill created by cutting the panel on a slight angle. 20 Eaves can be lined with Ezy-Lite T M Boards and the wall lined with Ezy-Lite T M Panel, the Panels consist of 8mm Ezy-Lite TM Board glued to 50mm Polystyrene board. The panel was fixed with approved adhesive spaced at 200 - 300mm centers and fixed with galvanised bugale screws @ 300mm, cts this provides a very strong fixing to timber frame. 25 After the installation of the Ezy-LiteTM Boards or Panels, the joints are taped with fiber Glass tape and the corners are protected with Stainless Steel external angles before any render is applied to the walls. Ezy-Lite T M Boards or Panels can be finished using one coat of Acrylic texture Render or Two coats depending the surface finish. 30 Installation Ezy-Lite T M Boards are a unique formulated material, when the board or panel is installed their would be no physical movements in compression or expansion at the joints, the contraction and expansion in hot or cold climates is 0.08%.Therefor no tapes or filler required at joints. The Ezy-LiteTM Board and Panels are Pre-rendered on one face where the 35 render is not applied on but molded into the board this method gives a solid and strong surface finish without cracking or flaking alike normal render procedures, this method saves time spent on site and huge amount of cost for rendering on small or large projects.

- 11 Ezy-Lite T M board is a very easy product to handle, despite its strength and rigidity. It must be installed in a professional "tradesman-like" manner to get the desired durability with perfect finish 5 Installing Ezy-Lite T M board may be fixed to either light or heavy gauge domestic type steel, timber frames or battens over masonry. All the framing and substrate used must comply with relevant building regulations and standards. It is also important to ensure that the frame is square and straight to provide the flush face 10 to receive the sheeting. Timber frame must comply with the requirements of AS1680 and Building Codes of Australia Studs must be provided at 450mm centres maximum, and noggins at 1200 mm centres Studs must be 90 x 45 for board joint on stud. 15 Boards should be installed individually. They should be lifted off the floor and kept away from the ceiling by approximately 6mm to allow for any frame movement / shrinking / expansion. Ezy-Lite T M board may be screwed or nailed to the frame as appropriately. Use Ezy-Lite T M fasteners suitable for the frame in place, ensuring that the screws have enough 20 length to provide a good grip into the timber frame. All testing preformed by approved Material Testing Laboratories, used approved adhesive and fasteners on Ezy-Lite T M Board samples for Australian Standard testing. We provided leading adhesive manufacturers samples of Ezy-LiteTMPanels and Boards to test the best 25 bonding agent that would be nontoxic when burnt, water proof, and will adheres to any materials such as brick, wood, steel and concrete. The fasteners we recommend For Ezy-Lite T M Board are Class 3 mechanical galvanized Phillips countersunk head screw with a Course thread which drives into the board and 30 timber excellent, use self drill fine Course head for steel frame, We recommend 8 x 40 50mm screws. For the Ezy-Lite T M Panel we recommend the Class 3 Mechanical Galvanized Buggal screws witha hex head and a self countersunk head, the size of the screw depends on the thickness of the panel. 35 For extra strength and stability, use the staggering method of laying the Ezy-LiteTM Board/ Panel, this method of stagger lying provides a good wall bracing.

- 12 The panels can be laid vertically or horizontally, either way requires no studs on joints. The Tung and groove system on the panel gives a solid and even surface. For windows and door areas, cut the panel where required and using fibre tape, tape the ends and render one or two coats. 5 Painting Any traditional Acrylic paint can be used on the Ezy-Lite T M Boards or Panels, for internal and external use one coat primer must be used without the use of anti- alkaline primer. 10 Cutting Ezy-Lite T M board can be cut very easily with a carbide tip knife for rough cuts, place the Ezy-Lite TM board rough side up, scour along a straight line with the knife, then snap along the scoured line. Finer cuts are achieved by using power tools such as circular saw, jigsaw, bench top saw, etc. ( Please note the section of Health and Safety Practices regarding dust) Refer to pictures below 15 Nailing. For best result on wall cladding, use Ezy-Lite TM Bond and galvanized nails for fixing, no pre drilling required, nails should be fixed 12mm from end and counter sunk max 1mm from the surface of the board. 20 Fixing. When fixing Ezy-Lite T M Boards or Panels, We recommend the use of Ezy-Lite TM Fasteners, which should not go more than 1.0mm from the surface of the board and 12mm away from edges. Further more do not over-spin thes crews due to losing grip to frame. Joining. When joining the two boards or panels together, ensure the ends are free from 25 dust, grease and oil before adding glue to ends. Tiling Using Ezy-LiteTM Board for tile underlay, we recommend using the rough side up of the board and glue down with Ezy-LiteTM Bond before nailing galvanized nails they should be used at 200 mm apart all joints should be sealed with approved sealer, apply tiles with 30 standard tile adhesive. Cutting Ezy-Lite T M Panels is made by using hand or power saw and Stanley knife when cutting Boards. Below are pictures showing the procedure of cutting the Ezy-Lite T M Board, simply place a straight edge along the required cutting area, that with a Stanley knife score 35 along the straight edge than snap of the board. Installing Ezy-Lite TM panels is accomplished in 3 basic steps which can be followed below, 1- Ensure wall is plumbed and free from any bows in timber wall.

- 13 2- Place small daps 50 cent size approximately 200 -250 mm centres 3- Place panel into position and fix with approved fasteners (for 60mm Panels use 14 x 100 Galvanised Buggal screw) make sure screws are countersunk approx 1 - 2mm below surface and 30 - 40mm from edge 5 Board or Panel details Compressive Strength 20MPa (3,000 PSI) Impact Resistance >6kJ/m 2 Tensile Strength >5.5 MPa Density 1000 Kg/m 3 Moisture Absorption 26% Maximum saturation (slow absorbing rate) Moisture Content 10% Thermal Conductivity 0.216 (W/m-K) (like a softwood) Modulus of elasticity 6045 N/mm 2 Flexibility 20.1 N/mm 2 Surface Alkalinity 1OPh Thermal Expansion 0.08% Hot/Cold Less than < 0.03% Expansion in Water No water drops form on surface Frost Resistance Non-Combustible / 9mm Exceeds 1 Hour Combustibility / Fire No Asbestos Ratings < 5 ug/g (not used in the process) Asbestos Analysis Tested designed ASTM E90=STC 48, 50, 55 and 60 Formaldehyde Analysis MgO + glass fibre Sound Attenuation (9mm) Basic Compound The following test has been conducted by recognized laboratories in Australia and Around the World to comply with AS/NZS (Australian and New Zealand Standards) and 10 International Standards. AS/NZS 2908.2-2000 Cellulose-Cement product -Part 2 : Flat sheets. The Product is classed as type A, category 4 within AS/NZS 2908.2. AS/NZS1530.2-1993 Method of tests on building materials, components and structure test for flammability of materials AS/NZS1530.3-1999 - 14 Methods for fire tests on building materials, components and structure simultaneous determination of ignition-ability, flame propagation, heat release and smoke release. AS/NZS1530.4 2005 Testing of full scale wall in temperatures of 1200 Deg C achieving over 90 Min on 8mm Ezy-Lite Board. 5 AS 2464.4-1981 Testing for thermal insulation. AS/NZS 4040.5-1996 Testing for resistance of impact. AS/NZS 4284-2008 Testing for building facade. B.C.A Meets the Building Code of Australia for Non-Flammable, Water Proofing, Impact Resistance and Moisture and damp proof. 10 Fire Rating Classification Per International Standards and Tests (class Al as the highest rating for building materials) European Standards UNI EN ISO 1182 (Noncombustible) Euroclass Al European Standards UNI EN ISO 1716 (heat resistance) Euroclass Al 15 European Standards UNI EN ISO 13501-1 (smoke and flame) Euroclass Al United States & Canada US ASTM El 36 - Noncombustible United States & Canada Surface Burning Characteristics CAN/ULC-S102 and US ASTM E 84 20 British Standards 476: part 7: 1997 and part 4: 1970, which shows it has a class 1 surface spread of flame and non combustible class. While we have described herein a particular embodiment of a wall lining it is further envisaged that other embodiments of the invention could exhibit any number and 25 combination of any one of the features previously described. However, it is to be understood that any variations and modifications can be made without departing from the spirit and scope thereof.

Claims (13)

1. A wall lining comprising a lining body formed of an amorphous cementious or material that provides an insulative characteristic and includes at least one outer surface allowing for application of a decorative feature. 5

2. A wall lining according to claim 1 wherein the at least one outer surface is of a material that provides a supporting stabilising and substantially planar surface.

3. A wall lining according to claim 1 or 2 wherein in one form the decorative feature is 10 formed by an uneven tactile surface.

4. A wall lining according to claim 3 wherein the uneven tactile surface is formed by a combination of predefined regular arrangement and an intermediate non-predefined irregular arrangement whereby the uneven tactile surface falls within a range of 15 variable surface simulating a partially rendered textured surface.

5. A wall lining according to any one of the preceding claims wherein the lining body is formed of cementitious material or MgO or other amorphous granular structure. 20

6. A wall lining according to any one of the preceding claims wherein the lining body is formed of a micro void forming material such as polystyrene, foam or other material that increases insulation due to its structure.

7. A wall lining according to any one of the preceding claims wherein the lining body is 25 shaped to form an outer shape which receives material in an inner void that increases the insulative characteristics.

8. A wall lining according to claim 7 wherein the lining body is U-shaped. 30

9. A wall lining comprising: a. a lining body; b. with on at least one outer surface an embedded cross linked member forming a membrane with a weave spacing; whereby the moulding of the wall lining body forms at least a partial extrusion of 35 material between the weave to provide a consistently rough outer surface such that the wall lining provides at least a partially pre-rendered outer surface. - 16

10. A wall lining according to claim 8 wherein the cross linked is a cross weave having substantially between 3 to 12 millimetre weave gap with the extrusion through the weave being greater than the thickness of the cross linked member and less than 50% of the spacing of the weave. 5

11. A wall lining formed in substantially planar sheets, panels or tiles for mounting to a structure to form a textured wall surface comprising: a. a lining body formed of MgO, glass material or cementious material; b. with on at least one outer surface an embedded weather and fire resistant 10 cross linked member forming a membrane with a weave spacing of about 5 millimetres in two orthogonal directions; c. an outer surface formed of the smooth substantially planar cross linked member and a partial extrusion of material between the membrane weave of the cross linked member to provide a consistently rough surface; 15 whereby the wall lining provides at least a partially pre-rendered surface.

12. A wall lining board according to any one of the preceding claims wherein the wall lining board includes any one or more of the following: a. a layer of material within the lining body to improve insulation; 20 b. a layer of material attached to the lining body to improve insulation; c. a U-shaped body for receiving a further material d. a layer of material forming a partially rendered surface e. a covering layer extending beyond the lining body and/or recessed from the end of the lining body to allow interfitting of multiple wall lining boards and 25 continuous covering layer; and f. a covering layer and lining body having mitred edges to allow interfitting of multiple wall lining boards and continuous covering layer.

13. A wall lining board substantially as hereinbefore described with reference to any one 30 or more of the drawings.