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AAA Advanced Home Inspections, Inc April, 2011 Newsletter
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Flat roofs can be a little trickier to repair than slanted roofs
because they are designed to hold standing water, which makes it
difficult to make a watertight repair. If instructions for repairing a
flat roof seem more complicated than you expected, you may want
to phone a roofing contractor rather than attempting the repair
yourself. Otherwise, some flat roof repair tips will entice you to take
a shot at it.
Florida Home Inspectors License #HI1277
Florida Mold Assessor License #MRSA1542
Florida home inspectors license #HI1277 Florida State Licensed #MRSA1542 HUD Certified Government Contractor #MGQ649
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Repairing a Small Area
Small damaged areas of a flat roof can best be repaired by removing
the damaged area and replacing it with a new section. Grab a broom
and sweep all the dirt and gravel away from the hole or the damaged
section of the roof. Do not discard the gravel. Use a straight-edged
utility knife to remove the damaged area. Cut out a rectangular section
of the roofing material. This will take some effort. You will need to cut
through the first layer of material and then begin cutting through the
other layers that are damaged.
Prepare the Replacement Section
Cut out a replacement section of roofing material from an asphalt shingle or roll roofing. The replacement piece should
be approximately the same size as the section you removed. Spread some plastic roofing repairr cement inside of the
cutout area. Make sure you cement up over the edges of the cutout section. Set the patch properly in place and then nail
the patch around the perimeter of the section with some galvanized roofing repair nails that are spaced approximately 2
inches apart.
Cut out another replacement patch that is 4 inches larger than the first replacement patch so that it will overlap the first
patch by 2 inches on every side. Cover the first replacement patch with the roofing cement, extending it outside the patch's
perimeter by about 3 inches. Press down the second replacement patch and hold it in place while you cement and nail it
the same way you did the first replacement patch.
Clean Up
After the cement has begun to set, sweep back the gravel onto the top of the patch to help hold it in place. The wind could
easily pick up your patch job and carry it away until the cement has hardened.
Quick Fix
Examine any lower lying areas of the flat roof to locate leaks, which is where damage often occurs because of the pooling
water. Use some absorbent materials and cloths to soak up the water. When the areas are completely dry, begin looking
for blisters or cracks in the roof. When you locate a blister, open it up with a knife. Make sure the knife does not enter too
deep or it will cause more damage. Drain the water from inside the blister and wait for the area to dry. Apply some roof
cement to the repair and tightly seal it.