What is the best way to tape the seams?
Generally, it is always easier to tape seams from above, just before attaching the exterior metal to the purlins. The most common method for taping seams with 5’ purlin spacing is to install double-tabbed rFOIL™ before attaching the metal. Both tabs are brought upward together, and often stapled every 1-2 feet. Foil tape is then applied atop the tabs. rFOIL™ Quick-Seam is another popular option, especially in post/frame buildings. Quick-Seam is a single-tabbed product, with double-coated tape on the interior side of the tab. When installed, the tab overlaps the next row of rFOIL™, the contact strip is removed from the material, and the tab is pressed into place on the adjacent material. Once attached, no other steps are necessary, and a secure vapor barrier is in place. When spanning purlins spaced 5’ apart, installing rFOIL™ Quick-Seam is slightly more difficult, but the convenience of not applying tape separately is a plus. In this case, it is important to maintain a consistent drape
