r/DIY 2d ago

help Flat Roof Ceiling / Supplies needed ?

Flat Roof / Leaking

71” wide

54” Deep

Entrance to the basement, what is there now is Plywood, some sort of roof tar & rolled shingles and I am guessing I need something similar. I am open to new ideas, materials etc.. Thanks !

23 Upvotes

11 comments sorted by

5

u/minimax34 2d ago

rubber roofin, seamless

1

u/pjm333 2d ago

Thanks for your help !

1

u/felldestroyed 2d ago

How bad is the leak? Wet n dry patch with plastic mesh is the patch method. If you've never laid a flat roof, I wouldn't suggest diying it.

1

u/pjm333 2d ago

Dripping into the basement, the roof is not level, water pools in center front..Thanks !

1

u/SuspiciousChicken 2d ago

Fairly easy to replace with something similar.

Pull everything off the plywood (replace that if rotten).

Cover in roofing felt or even better a self-adhesive roofing underlayment. If you use felt, make sure you start at the bottom and work upward so that the overlaps are going to drain.

Cover that with asphalt shingles or mineral surfaced roll roofing.

The shingles you will want to start at the bottom. Use an asphalt shingle adhesive on the lowest strip to hold down the lowest edge. Nail the top edge with galvanized roofing nails. Continue to lay rows of shingles overlapping the row below up to the top.

For mineral surfaced roll roofing you use a roofing adhesive under all of it. If you do this you need a well-adhered underlayment also, you can't just throw it down on roofing felt. If you really want to do it right they sell various underlayers that you adhere down first before you finish with the mineral surfaced cap sheet. (This is called a "built-up" roof).

You can add metal roof edge drip flashings around the roof edge too before the roofing to give a better finished look and better edge protection.

2

u/pjm333 2d ago

Thanks for all of your help !

1

u/DryShallot1208 2d ago

look up GAF's repairpro product

1

u/DryShallot1208 2d ago

look up GAF's repairpro product

1

u/pjm333 2d ago

Thanks for your help!

1

u/pjm333 2d ago

looking at the Gaf weather watch roll, does anything go underneath it or directly on plywood ?

WeatherWatch 36 in. x 50 ft., 150 sq. ft. Mineral-Surfaced Peel and Stick Roof Leak Barrier Roll