Shingles Roof Layers

Pros to overlaying a shingle roof.

Shingles roof layers.

Synthetic underlayment helps repel moisture and provides protection against water infiltration. Most building codes allow this but is it a good idea. Framing includes the roof trusses that sit at the top of your house and support the weight of all the materials used to build your roof. Two layers of shingles trap more heat which in turn damages the shingles and shortens the life span of the roof.

You create them through shingle snapping or buy them directly. You ll need longer nails for this part as you re driving through more layers of shingles. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. Here are the pros and cons.

There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan. That limit pertains to roofs with up to a 4 12 pitch. Shingles are the element that most homeowners are familiar with as it is the layer you can see from the outside of your home and it is an important aesthetic aspect. You can either use special shingles called ridge shingles or cut a number of regular shingles into 3 tabbed equal pieces and bend each so they fit snugly on the roof peak and nail them into place.

Roofing layers from the framing to the shingles so we ll start at the bottom of the deck and work our way up through all the roofing layers until we reach the shingles and sunshine above your roof. When it s time to replace your roof there are several factors that might lead your roofing professional to recommend adding shingles on top of your existing layers. Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles. Bring the ridge edges together with a ridge capping layer.

Saving on the initial shingle installation doesn t solve the long term cost of adding a second layer of shingles. Most building codes allow up to two layers of organic or fiberglass asphalt shingles. The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed.

It will cover all of your roof deck. This roofing layer will add even more protection against water perfectly combining with the water shield. First of all multiple layers of shingles simply means layering a new asphalt shingle roof on top of the old one rather than stripping the roof completely to expose the sheathing and replacing it with new shingles. 3 tabs are less expensive but also less durable have lower wind resistance and have a flatter appearance.