How To Seal Aluminum Roof Panel Seams

Metal roofs expand and contract a fair amount.

How to seal aluminum roof panel seams.

Exposed fasteners typically have a neoprene washer that seals the fastener head to the surface of the metal roof panel. Have to recommend against epoxy or other attempts to glue down the roof. Non skinning non drying butyl sealants are the primary sealant in standing seam roofs and the joints of insulated metal panels. These fasteners can be nails or screws.

Position the tape with the release backing on the top side. Metal roof systems typically include a combination of exposed and concealed fasteners. Designed to stay soft and flexible they ensure a positive seal when jointing roof or wall panels. Step 2 use a polyurethane sealant and apply it around the boltholes on the underside of the panels and allow to dry.

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. Walk to one end of the roof and locate the seam where the first row of panels overlap the second row. 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. Mcr uses 3m autobody sealant 08300 29 15.

How to seal between metal roofing sheets. Step 2 insert a tube of butyl caulking into a caulk gun and snip the end off using sharp scissors. Overtime fasteners have a tendency to back out of their seated position. Sweep the metal roofing sheets of all dirt and debris with a push broom.

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. Check the joints of a corrugated metal or plastic roof. Even attempting to seal the laps between panels with a sealant should be done only with materials specifically made for the purpose. Peel back the.

Apply a 1 4 inch wide bead of caulk over the seam where the two panels overlap. Not as bad as vinyl siding but enough to work the screws over time.