Shingles Roof Layers

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.

Shingles roof layers.

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. Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles. That limit pertains to roofs with up to a 4 12 pitch. There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan.

Saving on the initial shingle installation doesn t solve the long term cost of adding a second layer of shingles. Here are the pros and cons. Synthetic underlayment helps repel moisture and provides protection against water infiltration. 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.

Bring the ridge edges together with a ridge capping layer. Pros to overlaying a shingle roof. 3 tabs are less expensive but also less durable have lower wind resistance and have a flatter appearance. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed.

You create them through shingle snapping or buy them directly. Most building codes allow up to two layers of organic or fiberglass asphalt shingles. Asphalt shingles come in two major types 3 tab and architectural. Most building codes allow this but is it a good idea.

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. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. This is water resistant so moisture can pass through and water in a liquid form is blocked. It will cover all of your roof deck.

The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says. Roofing underlayment is a layer of material usually synthetic or felt that adds extra protection on top of the roof deck and under the shingles. This roofing layer will add even more protection against water perfectly combining with the water shield. You ll need longer nails for this part as you re driving through more layers of shingles.