Roof Replacement and
Roof Repair Specialist(703) 475-2446
January 16, 2012 by - 3 Comments
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Originally, roof felt was an actual felt made from rags soaked with asphalt. For over a hundred years roofers have been using felt as the first layer on a roof under shingles to protect against incoming water. Now felt is made from paper products soaked with asphalt.
Roof felt, comes in two weights or thicknesses. They were originally called 15# because 100 square feet, or one square, of paper weighed 15 pounds. The thicker one was 30#. As the cost of oil went up, the weight dropped almost by half, so they changed the names to #15 (number 15) and #30 (number 30). Another option is tar paper which is new, not recycled, impregnated with asphalt. It can be easier to work with and lighter. It is rated by how many minutes it takes liquids to seep through, and are rated 10, 20, 30, and 60 minutes. Roof felt is more moisture resistant and a better choice.
When you see damage inside your home, those ugly brown stains on your walls or ceilings, you know something is leaking and it most likely is coming from your roof. Call a roofing contractor for an inspection. They will track the leak back to the source, and if handled quickly, you may only need roof repairs, not a total roof replacement. When the roofer finds the source of the leak, it may be that the roof felt layers got torn in a storm and let the rain work its way into your home.
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