Good luck on your project.
How much over lay on tar paper roofing.
Even if there s older tar paper in place you should simply rip it off and replace it.
This will help give you a moisture barrier on the roof.
Multiply the width by the height for the square footage of each section then add the totals.
Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.
Drip edges on the eaves any valley liners and all flashing should be installed before the tar paper is laid.
Roofing felt is required to overlap 2 inches over the lower felt course.
And even though it is thinner it is just as strong as felt and less resistant to ripping.
Roof felt also known as tar paper is a waterproof fiberglass product.
In roofing and applying felt paper there is always extra left over.
Buy about 10 percent.
The felt provides a layer of additional weather protection between the roofing finishing material shingles tiles and the roof decking.
This paper is a new and in some aspects improved material for roofing underlayment.
Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.
It s thinner lighter and a single roll can cover much more area than a similarly sized roll of felt.
Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest.
After this lines should be snapped every 34 as you move up the roof.
The most common size width for rolls of roofing paper is 36 inches.
You will need just under 1 2 of a roll.
Make sure the rolls overlap by at least four inches and staple them into place on the wood.
Your math 10 x20 200 sqft.
Whatever your reason for attaching roof felt you should only do it after cutting your pieces to the appropriate size and cleaning and.
The black rolls of roof paper or felt are made with asphalt and are normally available in rolls.
The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below.
The specs on the website say that this will cover 432 sqft.
It is used for temporary roofing for weatherproofing and as an underlayment under shingles or other permanent roofing materials.
Video of the day.
Chalk lines should be snapped 33 5 8 above the eave line.
