Ice Dam Roofing Membrane

The distance from the lower edge of the roof to the intersecting point of the slope and the plumb line is the minimum required height of the membrane.

Ice dam roofing membrane.

In turn this water can creep up under the shingles causing a roof leak. An ice dam is a thick rim of ice that originates along the edges of a roof when snow melts and then refreezes. When installing a new roof or replacing the old one consider adding a water repellent membrane such as ice and water shield underneath the shingles. An ice and water membrane is a type of self sealing adhesive underlayment.

Installed underneath your shingles it effectively waterproofs your roof decking preventing leaks from heavy rains and ice dams. An ice dam is an ice build up on the eaves of sloped roofs of heated buildings that results from melting snow under a snow pack reaching the eave and freezing there. Grace ice and water shield roofing underlayment a registered trademark of gcp applied technologies is the name that contractors trust the most to protect their reputations. Ice and water membrane must be installed far enough up the slope to cover the first few feet of heated space.

Then install regular roofing underlayment tar paper over the top of the drip edge and over the ice barrier and continuing all the way up the roof. To set the height of the ice protection membrane according to the code measure 24 inches from the exterior wall and plumb up to the roof plane. Ice and water protector sometimes also referred to as ice and water shield is a waterproof roof underlayment membrane developed to protect vulnerable areas on a roof from ice and water damage. Ice dam leak protection membrane is required along the eaves of roofs in parts of the united states where ice dams have a history of forming.

Ice can build up on a roof slope usually at the unheated area at the eaves forming an ice dam that prevents water from draining off the roof. Grace ice water shield roofing membrane is used as an underlayment for sloped roofs to resist water penetration due to water back up behind ice dams or wind driven rain. Install the ice barrier membrane according to the manufacturer s instructions with the drip edge installed on top of the membrane. Grace ice water shield underlayment also offers leak protection in trouble prone spots like valleys skylights protrusions and other flashing areas.

Grace ice and water shield fully adhered smooth surface roofing underlayment provides best in class roof leak protection against wind driven rain and ice dams. Ice and water membrane is needed most to address ice damming issues during the winter. Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen.