Metal Roof Layers

However you should only install a metal roof over shingles if you have less than four layers of shingles on the roof.

Metal roof layers. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. Asphalt shingles can weigh up to four pounds per square foot depending on the brand. Installation of either type of metal roofing underlayment is fairly straightforward. Otherwise you will need to remove the shingles.

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. Ice water barrier this self adhering water proof and self sealing membrane is applied to the roof deck. Like most other things there are a few disadvantages of choosing metal roofs. Disadvantages of metal roofs.

Metal is the best choice due to its very low weight per square foot and its unique design. Another added benefit is that the layers of your old roof will further insulate your home. Most roof decking is made from sheets of plywood. A metal roof is an alternative to a shingle covered roof but a metal roof can actually be installed over shingles.

You can usually see the underside of plywood decking from the attic. 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. Staple each strip at the ends and once per square foot in the middle of the strip. The quality and type of underlayments used on the project in the long term will affect the overall performance of the roof.

Most often made out of plywood this roof layer is installed over the framing in a typical roof install. Otherwise they would be found everywhere. Where two parts of the roof meet in a. It s usually a peel and stick product that adheres directly to the roof deck.

Roof deck is the roofing material that sits on top of the roof trusses. It provides structure by tying the trusses and joists together. Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves. Add strips of felt paper or polymer underlayment horizontally across the roof making sure to overlap the layers by at least four inches.

The metal used for the roof can be tin copper aluminum or steel. Metal roofs can be much more expensive than shingles.