Metal Roof Layers

Otherwise you will need to remove the shingles.

Metal roof layers.

Add strips of felt paper or polymer underlayment horizontally across the roof making sure to overlap the layers by at least four inches. Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves. Disadvantages of metal roofs. Asphalt shingles can weigh up to four pounds per square foot depending on the brand.

Otherwise they would be found everywhere. The metal used for the roof can be tin copper aluminum or steel. Installing metal roofing over shingles is the best solution. It s usually a peel and stick product that adheres directly to the roof deck.

It provides structure by tying the trusses and joists together. Most roof decking is made from sheets of plywood. Metal is the best choice due to its very low weight per square foot and its unique design. Where two parts of the roof meet in a.

Staple each strip at the ends and once per square foot in the middle of the strip. Another added benefit is that the layers of your old roof will further insulate your home. Installation of either type of metal roofing underlayment is fairly straightforward. Metal roofs can be much more expensive than shingles.

Metal roofing weighs less than one pound per square foot. Get free shipping on qualified metal roofing or buy online pick up in store today in the building materials department. You can usually see the underside of plywood decking from the attic. Like most other things there are a few disadvantages of choosing metal roofs.

A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles. Roof deck is the roofing material that sits on top of the roof trusses. Most often made out of plywood this roof layer is installed over the framing in a typical roof install. The quality and type of underlayments used on the project in the long term will affect the overall performance of the roof.

Selecting the right underlayments for a lifetime metal roof should be a primary concern for anyone thinking about specifying or choosing to install a metal roof on their home. In terms of performance many homeowners choose a steel roof making it the most popular option when it comes to creating a metal roof over existing shingles.