If you re going to add a roof on top of an old one it s a good idea to remove any loose shingles and apply a new layer of 30 pound roofing felt before laying the new shingles.
Remove old roof felt.
Excessive and improper use of the sticky stuff however can leave.
Metal in that condition won t last as long as your new roof.
Besides being tripping hazards they can work through and damage the new shingles.
Oh you should put new felt paper on.
Work from the top bottom and sides to save back muscles.
What to do if the old roof is not straight if the existing roof has wavy horizontal lines you can take out the waves by snapping a horizontal line 1 2 inch below the shingle bottoms of one course.
For pieces that aren t coming loose press a putty knife underneath it.
It doesn t matter where you start or stop.
3 starter shingles a narrow row of asphalt roofing the starter strip is nailed to the perimeter of the roof with a bead of adhesive on top that grips the underside of the first course of shingles.
Leaks form and the materials erode into something that is better.
Actually i attended a roof seminar 10 yrs ago or so and they stressed removing the old felt their theory was the old felt acts like a dry sponge and removes the good properties from the new application.
We got a email this week from darryl up in crosby.
How to remove old flat roofing.
This synthetic layer which replaces felt paper covers the entire roof deck and is the second line of defense against leaks after the shingles.
Remove old felt from the roof with your hands and a putty knife.
Flat roofing has some advantages but when it ages or falls into disrepair it can be troublesome.
It would be crazy to try to save that old felt paper.
Grab loose pieces of felt and pull them off the roof with your hands.
Be careful not to damage the flashing.
Roofing tar also called mastic or cement plays an important role in roofing repair and installation.
If you re keeping the old metal flashing carefully remove nails and bend it upward off the shingles with a pry bar.
But if you see rust and cracks in the metal replace it.
He took the shingles off and the felt paper is still intact.
Remove the old shingles with tear off shovels.
Removing tar from a roof.
He says he s re roofing an old house.
Find a pre screened local roofing contractor.
Call for free estimates from roofing pros now.
Install a course along the snapped line then install succeeding courses using a guide or a snapped line.
He s wondering can you just go ahead and shingle over that or should you replace the underlayment.
Clean the roof with a push broom and remove or pound in any remaining fasteners.