Layers Of Roof Construction

Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves.

Layers of roof construction.

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. This provides added protection against ice dams. Installing the roofing felt does take care but can go very quickly. Roof deck is the roofing material that sits on top of the roof trusses.

However some areas on the roof have up to five layers of shinles. For dimensional shingles being installed over a layer of existing dimensional shingles you should always use a 1 1 2 inch roofing nail. In most areas building codes allow for up to two layers of shingles installed on a roof. These applications are ideal for flat roofs or protective surfaces under roof level decks.

Some roofing felts are actually glued down. However installing new flashings including special drip edge flashings made for reroofing will ensure a tight seal and a long life. It provides structure by tying the trusses and joists together. The tear off quote is 4 000.

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. The roof has varying number of layers with most areas having two layers of old shingles. Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install. A built up roof for example will typically include the built up membrane itself with or without gravel as well as some kind of insulation and cover board which will vary in thickness from roof to roof.

You can usually see the underside of plywood decking from the attic. This synthetic layer which replaces felt paper covers the entire roof deck and is the second line of defense against leaks after the shingles. 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. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.

Most roof decking is made from sheets of plywood. If two layers already exist you ll need to remove the old layers before installing a new layer of shingles. Is this about right for my area. Roof covering typically of flat and rectangular shapes and made of various materials such as slate wood flagstone plastic metal and composite materials.

These thick layers of roofing felt are installed by heating the back of the felt with a butane torch and then carefully applying it to the roof. New materials are 5 500.