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synthetic roof underlayment

I understand a lot of roofers are going to a synthetic underlayment instead of the traditional roof felt. Anyone know the name of it?

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Permalink Reply by ed ziobro on October 11, 2011 at 10:23am

Titanium Roof Felt is a great product to use ,it is attached with button caps and is good to use esp. when the final roofing shingles or metal installation is delayed. It will not tear easily in the wind, don't know if its synthetic or not but it is worth the expense.

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Permalink Reply by Joe on October 11, 2011 at 7:30pm

Hank,

To meet hurricane code (145 mph) down here in Fl. they first laid down what looked like tar paper. They nailed it down about every 2 feet with a washered nail about the size of a quarter. They then applied a peel and stick rubberized strips on top of that overlapping about 6 inches. Then to meet code they used metal disks about the size of a half dollar every 6 inches (that's not a mistake). They drove a #8 nail, 1 1/4 in. using a nail gun through the disk. This final layer seals around any nail driven through it. At this stage you felt like you were looking at poka dots all over the roof. They installed 4 - 4 four foot large vents to meet code on a 1500 sq ft roof. They are not pretty but they do a could job of keeping wind driven rain from getting in.

They also used a large L shaped metal strip along the edge that went into the existing gutter to keep water from wicking up under the tar paper. they notched around the gutter nails. They glued the tar paper to this strip.

The county required proof using pictures and rulers on each stage of the process.

I believe they use the same procedure no matter what the final roofing material is going to be.

This roof is not going anywhere.

Joe

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Permalink Reply by Eric Waterman on October 12, 2011 at 4:10pm

Other brands names are Tri-Flex and RoofTop Guard. I hope it helps.

Eric

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Permalink Reply by James W. Harbin on February 20, 2012 at 3:46pm

Hey Hank, Ice and weather shield is what we get on the east coast .You can run it in the valleys and even around windows and doors. Any fasteners that penetrate it is immediatly sealed. It's pricey and requires some skill to install but, it's forever. Have fun, Jim and Pam

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Permalink Reply by Red and Donna on February 23, 2012 at 9:51pm

Ice and weather shield is awesome stuff. I've used it on the last two house I built when I lived in CT. I will use it in the valleys of the cabin when I build.

Red