Ice water shield should be installed anywhere there s a chance of water getting under the shingles.
Roofing 1 or 2 rows ice and water.
6 pitch roof with a 12 in.
All overhangs should also be covered.
47 inches up the roof slope from the drip edge.
The ice and water shield is an amazing roofing product that was first introduced in the 1980s.
While this is an extremely rare necessity it is sometime called for.
Essentially if you have an overhang more than a foot deep you ll probably ended up putting on 6ft of ice and water.
Overhang and a 2 6 exterior wall.
This ice shield seals nail holes better then regular tar paper roofing materials.
Overhang and a 2 6 exterior wall.
An ice and water shield is a great roofing product to create leak free roofs.
50 1 2 inches up the roof slope from the drip edge.
Not all roofing underlayments are the same.
Some codes require a membrane at the eaves extending 2 inside the exterior wall line as an ice dam precaution.
On 4 12 or greater slopes the balance of the roof shall be one layer of 15 felt.
Ice and water the entire roof deck.
The minimum is typically 2 feet 24 inches or 0 60 m above the vertical projection of the inside of the exterior wall.
All commercially available ice and water shield comes in three foot rolls so if you have a 2ft overhang 1 roll will only get you about a foot inside the heated wall space hence another roll will be required.
It must be installed the full length of all valleys.
Cut the membrane into 3 5 m 10 15 ft lengths and re roll loosely.
But with a well insulated and well air sealed attic with good soffit to ridge ventilation and no valleys or dormers to collect snow and block ventilation ice dams should not be a problem.
In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in table r301 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 the ice barrier shall consist of not fewer than two layers of underlayment cemented together or.
Along every wall chimney or skylight where flashing will be installed.
Here s how proper installation of grace ice water shield the conventional method.
Peel back 300 600 mm 1 2 ft of release liner align membrane.
Ice water shield acts as an excellent back up protection in case any of these areas has a small leak.
Some shingle manufacturers require ice and water shield on very.
If you have a roof that you know to be older than 1980 it won t have this great product under the shingles.
On roof slopes of 2 12 to 4 12 the remainder of the roof shall be two layers of 15 felt applied in shingle fashion or 1 layer of ice dam protection.
If installed properly this reliable roofing underlayment can save homeowners 18 000 in reroofing costs.
A couple of examples of how far up the slope of the roof the ice barrier membrane must be installed.
These spots are on the eaves of your home up to 24 inside the exterior wall this usually means at least 2 rows or 6 feet in every valley 1 row or 3 feet around every pipe before the flashing is installed.
