Low Slope Roofing Underlayment

The underlayment can make it through the summer heat winter snow and spring rain on a low slope roof without anything covering it.

Low slope roofing underlayment.

Once the high temperature ice and water shield has been laid down you can now add the second underlayment layer. Liberty sbs self adhering base ply sheet is a self adhering roofing membrane designed for use with liberty sbs self adhering cap sheet. 1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products. Gcp applied technologies grace ice and water shield 36 in.

This will provide a double layer of underlayment across the entire roof. Ft coverage sbs modified asphalt polyester self adhered low slope roofing roll in black model lb323235 59 98 59 98. Asphalt saturated felt along the eaves and lap succeeding courses by 19 inches as shown in figure 2 3. This will provide a double layer of underlayment across the entire roof.

Start with a 19 inch strip of 15 lb. Ft model 5003002 149 00 roll 149 00. On low slope roofs like you have a water proof membrane like i ws is good insurance. That is why we like it to call the best roof underlayment 2020.

Then apply standard asphalt shingles over the membrane. Set your store. Also if you live in a climate such as the up in michigan and routinely get over a foot of snow standing on the roof you may want to consider it. While this is an extremely rare necessity it is sometime called for.

Water that gets below both the roofing and underlayment will cause the same amount of problems whether it permeates the plywood or follows the pipe down. If the roof slope is below 3 12 pitch see our previous post on how to determine a roof s pitch the entire roof should be covered but only if the roof is conventionally vented cold roof construction. In low slope roofs which include 2 12 up to 4 12 felt courses should overlap a minimum of 19 inches. And this synthetic roof underlayment becomes famous due to its quality easy installation process and affordability.

It has just one layer so it goes on fast and can be installed by a homeowner with basic diy experience and tools. Guide to roofing underlayment installation on low slope roofs with asphalt shingles. For a low slope residential roof there are two main options. Roll self adhered roofing underlayment 225 sq.

Some shingle manufacturers require ice and water shield on very low sloped decks between 2 12 and 4 12. I don t see any point in sealing the roof penetrations to the sheathing. It provides long lasting protection for the low slope areas of your property.