If at all possible this task should be left to a professional.
Tarp over flat roof.
Let the rest of the tarp hang off the lower border of the roof that overhangs the wall known as the eave.
A tarp placed over a flat leaking roof can protect the interior of your home from further water damage.
Fully secure your roof tarp to prevent flapping.
Using cap nails attach one of the tarp s peak ends to a 2 x 4.
More importantly the tarp should be long enough to hang over the roof s peak allowing the water to flow downhill without seeping into the tarp s undersides.
The screws must pass securely into the roof.
Screw the 2 by 4 directly into the roof to secure it.
Lay more 2 by 4s on either side of the tarp and attach those as well for a tight well secured water barrier.
Extend the top edge of the tarp over the roof.
Again nail the tarp to a 2 x 4 as you did on the other side.
Then fold the excess tarp under a few rotations for a tight clean fit.
If needed cut off the excess tarp from the other end leaving about a 4 overhang.
Secure the tarp s remaining sides with additional 2 x 4 boards using your screw gun and screws.
This will hold the tarp tight to the roof and keep the water out.
Put n ails in the board at least 10 apart for a secure connection.
Positions several 1 2 pieces of lumber on the tarp running vertically down the slope of the roof.
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Lay the tarp flatly over the damaged area and make sure there are at least 4 feet of it overhanging past the roof s peak and the rest over the eave.
The 2 by 4 should be about 2 feet longer than the tarp width.
Attach the 1x2s through the tarp and into the roof decking with eight penny nails about every 16 inches.
Lay the tarp across the roof so that at least 4 feet 1 2 m lies on the sloped part of your roof on each side known as the peak.
This will prevent water and debris from entering the damaged area.
While it may take weeks or even months to get a roofer out to repair the damage a tarp can be put in place pretty quickly.
However installing a tarp is a dangerous job even on a flat roof.
To begin securing the tarp screw through the rolled 2 x 4 boards with your screw gun.
Lay the tarp out flat over the roof.
Never lay the tarp out during a storm.
Most self adhering tarps don t stick well to wet surfaces so make sure that the roof s surface is dry.
Extend the top edge of the tarp over the ridge of the roof.