Does Roll Roofing Need Underlayment

This means that for a 36 inch width the underlay should overlap the row below it by a minimum of 19 inches.

Does roll roofing need underlayment.

Your shingles serve their own purpose. As seen in m. Roll roofing is different. It is a rather inexpensive roofing material often installed over 15 felt underlayment by diy homeowners.

Ft model 5003093 205. Roofing underlayment or felt is usually required for the ul fire rating to apply since shingles are usually tested with underlayment. It is usually sold in 36 inch wide by 36 foot long rolls. While it is not necessary to install an underlay with roll roofing it is inexpensive and adds a layer of protection that makes it worthwhile.

If possible install roll roofing over a smooth plywood deck either perpendicular or parallel to the slope. Roll self adhered roofing underlayment 225 sq. They re the first line of defense. Get free shipping on qualified underlayment roofing or buy online pick up in store today in the building materials.

Roll out the underlay and tack it down making sure that it is flat and smooth not buckled or wrinkled anywhere. Sometimes called roofing felt underlayment roofing tar paper or roll roofing this is a layer of protection installed between the roof deck and the roofing shingles. The roof deck should be sound and level before laying the underlayment. Get the real story about drip edge placement.

How to install roll roofing on low slope roofs. An underlayment of felt roofing is optional. Why do you need roofing underlayment. A typical roof has three layers a felt layer and two layers of overlapping shingles.

It has just one layer so it goes. Roll roofing is a common product chosen to cover low slope roofs. One roll of 15 felt is more than enough for most sheds unless it is unusually large. Typically roofs with a lower slope need overlapping underlayment.

While it can and has been used for residential roofs it is primarily used on utility structures. It s a moisture barrier. Gcp applied technologies grace ice and water shield ht 36 in. Roofing underlayment provides your roof with an extra layer of protection that shingles alone can t match.

Please call us at. Roofing underlayment or felt helps prevent unevenness in the roof sheathing from telegraphing through the shingles.