Law On Using Water Shield On Roofs

This is a code requirement in cold weather states.

Law on using water shield on roofs.

What does felt paper do. Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2 at left. If you have a more complicated roof with valleys skylights dormers vent pipes or chimneys it s a good idea to have ice and water shield installed in and around these areas as well as along the eves. The drip edge will be installed over the ice and water protector and other underlayments at roof rake edges you should install ice and water protector before other underlayments including roof felt.

If water does get under the shingles it will stay on top of the ice water shield and run off your roof where it belongs. The code in minnesota requires this special waterproof shingle. There are chemical concerns depending on your metal finish so you should confirm with the metal roofing supplier. The eaves flashing shall be installed from the end of the deck to a minimum of 24 inches up the slope.

Skipping this very necessary step just to save a few hundred dollars in the short term can cause major problems with your home as shown in the picture above. Ice and water shield is an extra layer of protection for your roof. Class a b or c roofing shall be installed in jurisdictions designated by law as requiring their use or where the edge of the roof is less than 3 feet 914 mm from a lot line. Ice and water shiled is not required but is highly recommended when installing a roofing system.

Water gets under roofing shingles. Traditional felt paper does a decent job at stopping most leaks where water gets under shingles tiles metal or slate. Ice and water protector needs to be installed directly onto the roof deck after you have placed the drip edge at the eave. Protection against ice dams can be obtained by using a special waterproof shingle underlayment at the eaves or ice barrier determination lower edges of the roof in addition to installing adequate ventilation and proper insulation in the attic.

Many metal roofs are attached using screws where ice and water shield prefers smooth fasteners for the best seal. Roofing ice and water shield may look like traditional felt paper but it s vastly different in performance. Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches. Ice and water shield is a far superior product compared to basic roofing felt paper.

Note that grace makes grace ice amp. 902 1 roofing covering materials roofs shall be covered with materials as set forth in sections 904 and 905. Eaves flashing is required to prevent ice formation at the eaves and gutter to back up beneath the roof covering. Ice water shield acts as a gasket around each of those nail holes creating a water tight barrier that won t let any leaks happen.