Installing Metal Roofing Directly Over Ice And Water Shield

Install grace ice water shield roofing underlayment directly on a clean dry continuous structural deck.

Installing metal roofing directly over ice and water shield.

Not all roofing underlayments are the same. Here s how proper installation of grace ice water shield the conventional method. I ve been trying to convince them to install a mechanically seamed standing seam metal roof but they like the look of comp better. Prior to membrane application remove dust dirt loose nails and old roofing materials.

If installed properly this reliable roofing underlayment can save homeowners 18 000 in reroofing costs. In terms of the i w shield it does need to be applied directly to the deck of the home and not to the felt. Peel back 300 600 mm 1 2 ft of release liner align membrane. Grace the manufacturer of ice water shield advises that its peel and stick membrane should be installed before the drip edge.

There are several reasons for this. Cut the membrane into 3 5 m 10 15 ft lengths and re roll loosely. If you have a roof that you know to be older than 1980 it won t have this great product under the shingles. If the ice water shield goes down first the plywood is better protected.

Some suitable deck materials include plywood wood composition wood plank metal concrete and gypsum sheathing. My concern is attaching the metal to the roof without any decking directly below the metal. The ice and water shield is an amazing roofing product that was first introduced in the 1980s. That being said a properly installed metal roof will be about 100x less likely to leak as a result of and ice damn than asphalt shingles.

I recently received a quote to install 3 polyiso foam lay ice and water shield over the entire roof and then install the berridge 24 gauge galvalume kynar 500 standing seam metal roof. Ice dams are formed by the continuous melting and freezing of snow due to heat escaping from the house or from a backup of frozen slush from the rain gutters the melted water flows under the snow and freezes as it reaches the unheated soffit area at the eaves thus. Learn how ice water shield tiger paw underlayment and gaf roof shingles are installed in this today s home remodeler episode with host stuart keith and an. If ice ever backs up from a clogged gutter the ice can get under the drip edge and reach the plywood.

High temperature hot roof construction ice shield metal roof underlayments water shield categories. Our roofer is reluctant to install comp on a 3 5 12 pitch as the national roofing association says 4 12 or steeper only.