How To Seal Aluminum Roof Panel Seams

How to seal between metal roofing sheets.

How to seal aluminum roof panel seams.

Lay 3 inch wide butyl tape. Even attempting to seal the laps between panels with a sealant should be done only with materials specifically made for the purpose. Apply a 1 4 inch wide bead of caulk over the seam where the two panels overlap. Step 2 insert a tube of butyl caulking into a caulk gun and snip the end off using sharp scissors.

Check the joints of a corrugated metal or plastic roof. Metal roofs expand and contract a fair amount. Lay 6 inch wide butyl tape over all horizontally lapping end seams. Non skinning non drying butyl sealants are the primary sealant in standing seam roofs and the joints of insulated metal panels.

Because the sealer tends to shrink some as it cures seams like this one between the quarter and trunk filler panel typically require two applications. Exposed fasteners typically have a neoprene washer that seals the fastener head to the surface of the metal roof panel. Peel back the. The sheets are commonly overlapped at the joints and deterioration of the material at the location of the bolts holding the panels in place can cause leaks.

Position the tape with the release backing on the top side. Not as bad as vinyl siding but enough to work the screws over time. Sweep the metal roofing sheets of all dirt and debris with a push broom. Designed to stay soft and flexible they ensure a positive seal when jointing roof or wall panels.

Mcr uses 3m autobody sealant 08300 29 15. These fasteners can be nails or screws. Have to recommend against epoxy or other attempts to glue down the roof. Overtime fasteners have a tendency to back out of their seated position.

The elastomeric at roofing panel seams may work for a few years if squeezed or brushed into the seams but the best way is to loosen the fasteners at the seams assuming overlapped seams and caulk tube it onto the lower sheet then replace the fasteners so it squeezes the sealant tight between them. Step 2 use a polyurethane sealant and apply it around the boltholes on the underside of the panels and allow to dry.