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Flat Roof-Fixed twice,still leaks,how can we find the leak?

Flat Roof-Fixed twice,still leaks,how can we find the leak?

Old 01-17-00, 09:56 PM
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We have a flat roof over our Dinning room,the AC/Heating unit sits also on top of it.We fixed it twice,once the roof itself was raised,it lasted a couple of years.After a bad storm,the roofing paper tore of,we fixed that,but it still leaks.How can we fix this or how can we locate where the leak is,and make sertain this doesn't need to be fixed every year.Very frustrating,cause we invested so much time and money and it leaks still...any help would be greatly apriciated.
Old 01-20-00, 12:49 AM
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when you repair or install a roll roffing roof, you roll out the felt and tack it! no if you notice the edges are wavey and the middle is tite, so when you fixed it after the storm one of the wavey edge is holdin one layer apart and water is buckin back up under buckin is when water goes from the bottum up under and in . so look for a wave at the lower edge of each coarse clean away any dirt dust ectra. tar and nail. happy hunting
Old 01-20-00, 01:46 PM
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Without seeing how the air conditioner is mounted, it is
difficult to answer the question. But, I will tell you how
it should be done on a flat roof. First of all you need to
have curbing placed under the spot where the air conditioner
will be placed. The curbing must have "cants" installed on
all four sides. The curbing with the cants must be properly
flashed and the roofing material must be properly installed.

Now, after that is done, you can place the air conditioner on
the curbing. You will notice that the air conditioner is off
of the roof surface. When the air conditioner is installed,
it should be mounted on "shock absorber" material so that the
vibrations of the air conditioner compressor do not telegraph
down into the roof. If it has been installed this way, it
should not leak. This is the way they are done on commercial
jobs and it should be done that same way on flat roofs on
residential houses.

Clifford A. Olson, Home Inspector
FreeHomeTips - *Free* ezine
or go to http://www.caolson.com/ac-home-inspector/
Old 02-07-00, 08:06 AM
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To locate a leak: Access you crawl space area. Use a flashlight or corded light and track down the general area in question. Look for black water stains under the roof decking or along a rafter. This is usually a surefire way to find a leak when it's not raining out.

Good luck

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