What is ice and water shield underlayment?
Ice and water shield is a peel and stick product that adheres directly to the roof deck. It forms a water-proof barrier where ice most often build up on the eaves edge due to ice damming. An ice dam is a thick ridge of ice that forms at the edge of a roof when snow melts and refreezes, preventing melting snow and water from draining off the roof. This water accumulates behind the ice dam and can leak into your home, causing damage to walls, ceilings, insulation, and more.
Ice and water shield is mainly composed of a rubber membrane and a slip-resistant coating, depending on the manufacturer. It is very adaptable and can be installed on different kind of steep slope roofing products such as asphalt shingles like 3-tab, composition shingles, architectural shingles, tile, slate, metal panels, and standing seam roofing systems. It measures 3 ft. wide and is distributed in 1–2 sq. Rolls.
What are benefits of ice and water shield?
– Seals around fasteners
– Attaches to the decking
– Watertight lapping
– Protects decking
– Potentially re-roofable
Ice and water shields can be required by local building codes
If you have a closed valley structure on your roof, this product is required by local code. All closed valleys require a valley liner per municipal code to protect into the event of wind-driven or ice-driven water penetration.
Pay attention to underlayment in roofing estimates
This is a very specific item to review in your proposals for roof replacement to guarantee it is included to meet minimum code requirements or as an improvement feature to your roof replacement. Even if you have metal valleys, this product can still be installed and will provide utmost protection.
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