Installing Ice And Water Shield On Existing Roof

This ice water shield is applied as an underlayment prior to putting the shingles on the roof.

Installing ice and water shield on existing roof. Ice and water shield is a membrane that will stop all leaks. If installed properly this reliable roofing underlayment can save homeowners 18 000 in reroofing costs. When water and ice is installed should it be adhesive backed and should it be on the bare sheathing at first i was going to give my standard response but i thought this would be an excellent teaching moment. Install roof drip edge along the eaves add underlayment then place drip edge along the gable end.

Peel back 300 600 mm 1 2 ft of release liner align membrane. This lets any water that gets on the roof run down the underlayment and over the drip edge. Bruce asked me the following question. This ice shield seals nail holes better then regular tar paper roofing materials.

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. Ice and water protector needs to be installed directly onto the roof deck after you have placed the drip edge at the eave. 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.