Ice On Roof Sheathing

With the code recommended installation of the ice barrier over the drip edge water can back up at the eaves edge and get behind the vertical leg of the drip edge where it can end up flowing into the joint between the fascia and the roof sheathing.

Ice on roof sheathing.

But ice dams can form in the gutter as well as on the roof. There it soaks the insulation rendering it much less effective and can leak through the ceiling drywall below and into your living space. 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. Extend the membrane on the roof deck above the highest expected level of water back up from ice dams and above the highest expected level of snow and ice on the wall sheathing on vertical side walls dormers and vertical front walls for ice dam protection.

After spending a lot of time on gba i believe the best approach is to put exterior foam on the roof sheathing as we are looking to replace the shingles this summer due to the damage that was caused to the shingles to remove the ice dams and the fact that the builder never applied any ice water guard. 1 inch 25 4 mm 1 mile per hour 0 447 m s. A strong resilient roof is a home s first line of defense when the roof deck is exposed to weather. Also large ice dams can be very heavy and can damage gutters and even.

Scroll down 01. 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. United roofing gator skin synthetic roof underlayment 42 in x 285 8 ft 1 000 sq ft synthetic roof underlayment. 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.

905 1 2 ice barriers in areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table 301 2 1 an ice barrier shall be installed for asphalt shingles metal roof shingles mineral surfaced roll roofing slate and slate type shingles wood shingles and wood shakes. 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.