One Layer Roof

Some roofers install a layer of waterproof shingle underlayment wsu over the existing shingles at the eave end as would be done for a roof laid on bare sheathing.

One layer roof.

If you intend. Inspect your attic for cracked or sagging rafters a sign that a layover could cause more damage. This provides added protection against ice dams. Single ply roofing cost.

Installing new roof shingles over old effectively doubles the weight of the roofing so you have to make sure your roof structure can handle the extra load. You can usually see the underside of plywood decking from the attic. However some areas on the roof have up to five layers of shinles. Many roof decks were designed to handle only one layer of shingles.

The tear off quote is 4 000. We explain when double coverage of felt underlayment is recommended and we describe how to figure out if your roofer installed a single layer or double coverage layer or maybe no layer of felt under the roof shingles. However installing new flashings including special drip edge flashings made for reroofing will ensure a tight seal and a long life. Double layer or double coverage roofing underlayment are defined here.

When it comes to estimating the weight of an existing roof field. Ice water barrier this self adhering water proof and self sealing membrane is applied to the roof deck. It provides structure by tying the trusses and joists together. Roofing felt underlayment layers.

I have an itemized quote for a 28 square single story roof including a detached garage in los angeles ca. The additional weight of multiple layers may also be more than the roof supports can bear. The roof has varying number of layers with most areas having two layers of old shingles. As a result you ll typically lose one quarter to one third of the roof life.

Often there is a problem with the first layer of shingles that was not apparent. New materials are 5 500. On the flip side removing the original roof shingle layer drives up the replacement cost so the decision is an economic one. The cost associated with the material and installation can vary widely depending on roof conditions the attachment used and the type of membrane being installed.

Most often made out of plywood this roof layer is installed over the framing in a typical roof install. Single ply roofing is priced per square foot and an average price for materials and installation of a 60 mil roof may range from 3 to 5 per square foot. Adding a second layer could compromise the structure of your roof. Note that roof systems typically include more than one type of material.

Having an old layer of roof shingles under your new layer accelerates that process as the original layer holds a lot of heat.