It s usually a peel and stick product that adheres directly to the roof deck.
Roof layers house.
Now you just have to decide whether to remove the existing roof shingles or recover the roof.
Most roof decking is made from sheets of plywood.
For many years it was acceptable to put even the third layer.
Most cities and towns allow a maximum of two layers of shingles says chad muth president of muth company roofing in westerville ohio.
When to consider re roofing.
The average 30 square roof uses 90 bundles of shingles and a bundle of asphalt roofing shingles weighs about 100 pounds which means you re.
3 starter shingles a narrow row of asphalt roofing the starter strip is nailed to the perimeter of the roof with a bead of adhesive on top that grips the underside of the first course of shingles.
You can usually see the underside of plywood decking from the attic.
Roll out a single layer of roofing felt or tar paper which serves as a moisture barrier.
There are quite a few parts of a roof on a home including different layers and.
But contractors who spoke with angie s list say best practices call for stripping the roof down to the wood deck to inspect it before installing a new roof.
You re essentially adding a second roof on your house and that added weight puts stress on the roof decking which is especially worrisome in our climate that gets heavy rain and snowfall.
Custom cross section diagram of a house roof showing the many different parts of a residential roof including structural parts the various layers exterior and various roof features such as skylight and chimney.
Like many aspects of a home a roof is fairly complex.
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.
Asphalt shingles typically can have one more layer added over the top two roofs total.
Begin this layer at the bottom of the roof and add it in horizontal rows with a slight overlap to prevent.
Each layer has a specific purpose that when combined with the other components provides protection to your home.
Roof maintenance is a major part of any homeowner s responsibility.
On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.
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.
The roof is a system composed of layers of different materials that work together to keep wind and weather out of your home.
Here are the layers of a roof in order of application bottom to top.
Roof deck is the roofing material that sits on top of the roof trusses.
This synthetic layer which replaces felt paper covers the entire roof deck and is the second line of defense against leaks after the shingles.
Ultimately it s best to work with a roofing professional to determine if your roof is eligible for re roofing.
