Roofing Ice Dam Membrane

In turn this water can creep up under the shingles causing a roof leak.

Roofing ice dam membrane.

An ice dam is a solid ridge of ice that forms along the edges of your roof. Install the ice barrier membrane according to the manufacturer s instructions with the drip edge installed on top of the membrane. Installed underneath your shingles it effectively waterproofs your roof decking preventing leaks from heavy rains and ice dams. An ice dam is a thick rim of ice that originates along the edges of a roof when snow melts and then refreezes.

Snow starts to melt in certain areas of the roof which are warmer than others due to heat loss from the attic. 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. The purpose of ice and water underlayment is to stop water from passing through the roof system into a home. 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.

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. An ice and water membrane is a type of self sealing adhesive underlayment. Ice and water membrane is needed most to address ice damming issues during the winter. A roofing membrane required by building codes in the united states installed under the roofing material helps prevent leakage from ice damming but has no effect on the formation of ice dams.

Assuring integrity of the roof s waterproofing prevents leaks and consequent damage. Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen. Grace ice water shield underlayment also offers leak protection in trouble prone spots like valleys skylights protrusions and other flashing areas.