With applications every five years roof maxx can add up to 15 years of life to an asphalt roof.
Asphalt shingle roof layers.
If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice.
There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan.
Most building codes allow up to two layers of organic or fiberglass asphalt shingles.
While most asphalt shingles are marketed to last between 25 50 years some roofs don t last more than 7 10 years.
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.
Most building codes allow two layers of organic or fiberglass asphalt shingles on roofs with a 4 12 pitch or less and three layers on steeper roofs.
Let owens corning help you determine when it is time for a new roof and then let us help you choose the shingles for your roof that are right for you.
Owens corning produces high quality asphalt coating asphalt sealants and adhesives for asphalt shingles.
Fortunately roof maxx s revolutionary new technology uses 100 natural plant based bio oil to restore shingles flexibility and instantly add five years of life to a roof.
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.
Ridge vents are at the top of your roof covered by roofing material but with a gap designed to allow warm moist air to escape from the attic.
Here are the pros and cons.
Pros to overlaying a shingle roof.
If you are putting a layer of asphalt shingles over an existing layer of asphalt shingles on to a 3 4 inch deck or a plank deck then you should be using 1 1 2 inch nails.
If the structure can support the added weight a typical 20 square 2 000 square foot reroof will cost at least 1 000 less than a tear off job.
This type of roof shingle consist of a fiberglass mat saturated on both sides with hot asphalt.
More than 70 of all houses in north america are covered in asphalt roof shingles.
Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles.
The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says.
Most building codes allow this but is it a good idea.
The top surface of the shingle includes a granule mineral coating.
Here s a closeup view of an asphalt roof shingle.
Experience the total owens corning roofing system and high quality roofing shingles.
There are a variety of factors that affect the lifespan of your roof including climate roof design installation and material.
