b"Joining Details -CLASSIC & PRIMELOK WEATHERBOARDSAs a natural timber product, Weathertex inherently expands and contracts with changes to its moisture content. To accommodate this movement, Weathertexs traditional joiners have been designed to provide the correct spacing between adjoining planks, and cover changes in dimensions of the product. For walls greater than 11m long, engineers/designers must assess additional requirements for frame and cladding control joints. Any cut ends must be primed with a solvent based exterior wood primer or an acrylic tannin resistant wood primer.NOTE: Avoid penetrating PC/ABS joiners with fixings during the installation process. This may cause the joiner to crack after the installation. Where necessary predrill the fixing position through the joiner prior to fixing. Also avoid positioning fixings directly opposite each other across a join as this too may cause joiner damage after installation.Using traditional joiners Form joins between Weatherboard ends using the relevant joiners for the selected profile - refer to the Accessories Section. Stagger joins randomly or brick lay throughout the wall with joins being formed midway between the studs. When fitting the joiner, bring the ends into moderate contact with the splayed edges or nibs within the joiner. Do not force ends tightly together. Simply cut joiners to fit at window heads, sills and eaves as required. NOTES:1) On the first row of Weathertex Rusticated remove leg gaugefrom the back of the joiner 2) To fit joiners to cut ends of Primelok Weatherboards it is necessary to trim back the plastic splineImages showing Classic smooth and Ruff-sawn joinersUsing Concealed JoinersWeathertex also provides concealed joiners. Concealed joiners have been designed with a gap that will accommodate most changes in the dimensions of the product. The joiner is flashed on the rear of the Weathertex product to prevent water penetrating into the cavity. 1. Insert the primed end of the Weatherboard into the concealed joiner, resting the bottom edge on the base and locking into position under the top flange. The edge of the Weatherboard should be in moderate contact with the centre nibs within the joiner. Do not force ends tightly together. The top flange will be hidden by the overlap of the board.2. Insert the primed end of the next Weatherboard into the other side of the joiner against the centre nibs. A 6mm gap will be left when both ends are in contact with the centre nibs.3. Fasten the Weatherboard to the wall at each stud in accordance with product requirements. Ensure nails do not pass through joiner.4. Insert a length of appropriately sizes Gap Filler Rod into the joint up against the face of the concealed joiner.5. Using a caulking gun, run a line of quality, highly flexible, paintable polyurethane sealant up the length of the concealed joiner. Always follow the sealant manufacturer's application instructions. Photo showing 200mm Concealed Gap Filler Rod Diagram JoinerNOTE: When using sealant, movement in the planks may result in visible bulging or concaving of the sealant. In some cases, such as where extreme changes in moisture have occurred, the sealant may pull away from the board leaving a crack between the sealant and the board. This movement will not affect the performance or water tightness of the join, though it may be aesthetically displeasing. If this would cause an issue, Weathertex recommends the use of the traditional joiner. 26"