When weather-tightness is critical, use sealant tape in all sidelaps. Shown and install in the indicated sequence. In applications requiring a panel endlap, please refer to theĭetailed instructions in this booklet. ToĪccomplish this, begin by installing the first sheet square with theĮave and gable at the down wind end of the roof, farthest away from Panel sidelaps should face away from wind driven rain. Load tables are available forĪll FABRAL panels contact FABRAL for additional information. ![]() For moreĭetailed information on Re-roofing applications, consult FABRAL Technical Bulletin #721, Re-Roofing With Metal. Will provide a solid framework for attaching the metal panels. Purlins should be fastened through the decking and into the rafters. Is in question, or where existing shingles will be left in place, new 2x4 On re-roofing projects where the condition of the old decking When usingsolid decking or sheathing, always use 30-lb feltįastener spacing and larger diameter #14 screws. Solid decking is highly recommended for all residential applications. May warp, twist, and shrink as the wood seasons fully, causing waviness in the panels as well as loosening and leaking of the fasteners. Hardwoods are difficult to fasten into without splitting and contain tannicĪcids that are corrosive to metal panels. Is recommended for purlins or decking (pine, fir, hemlock, and spruce). Pullout values decrease if theįasteners protrude completely through the purlins. Purlins, FABRAL recommends a maximum spacing of 24” on-center Since 1” nominal lumber and solid deckingĪre thinner, they provide somewhat lower pullout values. The substructure to which the metal panels are fastened mustīe properly spaced and sufficiently thick to provide a roof or wall systemĪ 2” nominal lumber thickness provides the maximum pullout Translucent panels should be cleanedĪnd sealed regularly, as recommended by the translucent panel manufacturer. If used on roofs, apply butyl caulking to separate theįiberglass panels from the metal. In a short time and cause staining and premature corrosion of the metal Translucent panels used in roofing applications will break down In all situations, foot traffic should be avoided on translucent Use a vaporīarrier such as polyethylene plastic or 30-lb felt to prevent moistureįrom contacting both the insulation and the metal panel.įABRAL’s translucent panels are intended for siding applications only. Porous insulation materials may absorb and retain moisture,Īnd should not be used in direct contact with metal panels. Metal panels and any potentially corrosive materials should be prevented. With steel, use a separator as described above and fasten with Stainless Steel screws.įertilizer, lime, acids, feeds, manure, soils, and many otherĬompounds also cause corrosion in metal panels. When using aluminum panels in direct contact Plastic, builders’ felt, bituminous paint, caulking, or gasket material may be used to separate panels from treated woodĪnd dissimilar metals. Request FABRAL Technical Bulletins #803, 106, and 107 for more information on treated lumber Likewise, dissimilar metals also require a protective barrierīetween them to prevent galvanic corrosion. Treated wood since the soluble copper in the preservative is corrosive toĪluminum. Aluminum must be separated from contact with all Treated fasteners should be used into these non-compatible pressure Lumber or the new ACQ (Alkaline Copper Quartenary), CA (CopperĪzole), or CBA (Copper Boron Azole). ![]() Predominantly used before 2004, but not with the older Penta treated ![]() When treated lumber will be in direct contact with metal panels or flashings please note the following: Galvanized steel is compatible with theĬCA (Chromated Copper Arsenate) pressure-treated lumber that was Protect metal panels from potentially corrosive situations and materials. In order to ensure the anticipated performance and longevity, **Due to Product improvements, changes and other factors, Fabral reserves the right to change or delete information herein without prior notice or obligation to make changes in products previously purchased.
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