Shingle Roof Roofing Layers Diagram

Roofing underlayment is a layer of material usually synthetic or felt that adds extra protection on top of the roof deck and under the shingles.

Shingle roof roofing layers diagram.

It is a waterproofing layer made of regular felt stacked above the solid decking board and then completely covered by the shingles or other roofing materials. Ice water barrier this self adhering water proof and self sealing membrane is applied to the roof deck. It is applied directly to the roof sheathing to protect the roof from the elements while shingles are fixed to the roof. The roof deck is the structural foundation base for the roof system and is usually made of wood or plywood.

You can usually see the underside of plywood decking from the attic. Synthetic underlayment helps repel moisture and provides. Doing it properly will keep you without problems for 20 or 40 years. Keeping a solid roofing layer of shingles is an important way to avoid water damage and leaks.

It used to be that the only type of roof metal available was the flat panel or corrugated standing seam roof. If your roof s width is not an even multiple of the shingle s length you will have a partial piece on one end of each row. Look at this wood shake example from classic metal roofing systems. Underlayment in high wind areas i e where wind speeds are 110 mph or greater must be secured with.

Measure the length of a shingle as it lies across the roof. Laying shingles can be hard and hot work but the reward of an attractive watertight roof can be worth it. Once fixed the underlayment will help repel the moisture. When to consider re roofing.

When complying with the irc most roofing systems will require two layers of underlayment when the. Underlayment is the second layer of protection for the roof. Roofing layers from the framing to the shingles. Roof slopes greater than 4 12 require only one layer of underlayment.

If so you ll likely save quite a bit of money by leaving your existing roofing system in place beneath a new layer of shingles. Roof slope is between 2 12 and 4 12. For example there s a starter course of roofing shingles installed at the eaves before the roofing shingles you can see. Most asphalt shingles are 3 feet 91 4 centimeters in length.

So we ll start at the bottom of the deck and work our way up through all the roofing layers until we reach the shingles and sunshine above your roof. A valley is defined as the area where two roof fields join to make an inward angle. Now you can get nearly any style of roof shingle manufactured from metal. Most often made out of plywood this roof layer is installed over the framing in a typical roof install.

Ultimately it s best to work with a roofing professional to determine if your roof is eligible for re roofing. This will help determine how the shingles will lay on the roof width. It provides structure by tying the trusses and joists together.