Table of Contents
Does drip edge go over or under ice and water shield?
(The drip edge will be installed over the ice and water protector and other underlayments at roof rake edges.) You should install ice and water protector before other underlayments, including roof felt. Around roof features like dormers and chimneys, you should place ice and water protector below flashing.
Do you nail ice and water shield?
When nails penetrate the ice and water shield on the roof, the rubberized nature of the material creates a gasket effect on the shaft of the nail. Leaks simply don’t happen. Not only does ice and water shield stop leaks caused by ice dams, but it also stops leaks created by fierce wind-driven rain.
What goes on first ice guard or drip edge?
The best way is to install the roof drip edge only along the eaves first, then place ice-and-water barrier (in the snowbelt) or felt paper (underlayment) over the drip edge. This lets any water that gets on the roof run down the underlayment and over the drip edge.
Where should ice and water shield be installed?
Where Is Ice & Water Shield Needed?
- 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.
- Along every wall, chimney, or skylight where flashing will be installed.
How far should shingles hang over drip edge?
Shingles should not extend more than 3/4” (19 mm) past the drip edge. If shingles overhang the edge of the roof by more than 3/4” (19 mm), then they are not supported and may crack and break off.
How do you remove ice and water shield from roof?
Sometimes shingles come off the ice shield better when it is hot. In that case, let the area heat up a bit and then tear that area off, and then the shingles will separate from the ice shield. Sometimes shingles just won’t come up at all.
How do you calculate ice and water shield on a roof?
Once you calculate how far up the roof needs to be covered, you can calculate the total amount of ice and water barrier needed by multiplying the coverage in feet by the length of the eaves that need to be covered in feet.
How long is a 2 square roll of ice and water shield?
36″ x 66.6′ Ice & Water Shield® Roofing Underlayment – 2 SQ. Roll.
What is ice shield on a roof?
Ice and water shield is a waterproof membrane used to protect your roof from ice and water damage. Its main purpose is to protect your roof decking if water gets underneath your roofing material (asphalt shingles, metal roof, etc.).
When do ice dams need to be installed?
During winters when there is a lot of snow and ice dams form higher up the roof slope, water can pond up behind the dams and reach higher than 36 in. The winter of 2014-2015 in my southern New England area reinforced the need for ice barriers to be installed according to the code.
Where does Ice Barrier need to be on roof?
Section R905.1.2 Ice Barriers in the 2018 IRC says the ice barrier “… shall … extend from the lowest edges of all roof surfaces to a point not less than 24 inches inside the exterior wall line of the building.”
Can you put an ice barrier over a drip edge?
But ice dams can form in the gutter, as well as on the roof. 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.
Why do you put ice and water on your roof?
Ice and water is most commonly known for its use on eaves.. Along the bottom eaves, it is used for protecting against ice and water dams. Ice dams are caused by the water melting from the top off the roof (where it is heated) and rolling down to eaves where it freezes again.