Roof Layers Shingles

The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says.

Roof layers shingles.

There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan. 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. 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. Gaf timbertex pewter gray double layer hip and ridge cap roofing shingles 20 lin.

Per bundle 30 pieces model 0840552 49 95 bundle 49 95 bundle schedule delivery. Consumer reports reveals the best roofing shingles from its comprehensive tests including 3 tab architectural and multilayered architectural asphalt shingles. Asphalt shingles come in two major types 3 tab and architectural. Most building codes allow up to two layers of organic or fiberglass asphalt shingles.

Pros to overlaying a shingle roof. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. California roofing laws cover everything from licensure of the roofing company to the types of shingles that must be used to the slope of the roof. 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.

Most building codes allow this but is it a good idea. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed. Two layers of shingles trap more heat which in turn damages the shingles and shortens the life span of the roof. Set your store to see local availability add to cart.

That limit pertains to roofs with up to a 4 12 pitch. 3 tabs are less expensive but also less durable have lower wind resistance and have a flatter appearance. California roofing codes establish a list of rules that all builders and contractors must adhere to in order to ensure safe building practices within the state. 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.

Gaf quickstart 33 lin. How many layers of shingles are allowed on a roof. Saving on the initial shingle installation doesn t solve the long term cost of adding a second layer of shingles. 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.