Ice On Roof Sheathing

The water trickles down between the layer of snow and the shingles until it reaches the eave of the roof which stays cold because it extends beyond the side of the house.

Ice on roof sheathing.

It creates a waterproof barrier to standing water if installed correctly. Install the ice barrier membrane according to the manufacturer s instructions with the drip edge installed on top of the membrane. R905 8 2 deck slope wood shakes shall only be used on slopes of three units vertical in 12 units horizontal 25 percent slope or greater. 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.

In areas where the average daily temperature in january is 25 f 4 c or less solid sheathing is required on that portion of the roof requiring an ice barrier. Grace ice water shield is a versatile underlayment material that may be used on sloped roofs under mechanically attached roof coverings such as asphalt shingles slate tile cedar and standing seam metal in many climate and assembly conditions see limitations for additional information. To shed water away from the eave most roofers add a metal drip edge right to the roof deck covering it with the membrane. R905 8 2 deck slope wood shakes shall only be used on slopes of three units vertical in 12 units horizontal 25 percent slope or greater.

Zip system roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. Felt paper does not stick to anything. An ice dam forms when the roof over the attic gets warm enough to melt the underside of the layer of snow on the roof.

If we just skip the ventilation gap and install the second layer of plywood roof sheathing directly to the top surface of the eps rigid foam are we risking getting a lot of ice damming a. A self adhesive membrane applied along the roof s perimeter from the eaves up. In areas where the average daily temperature in january is 25 f 4 c or less solid sheathing is required on that portion of the roof requiring an ice barrier. Grace ice water shield 36 in x 75 ft 200 sq ft rubber roof underlayment.

Ice and water shield is different from felt paper because it s a rubberized membrane that sticks to itself and the wood roof sheathing.