Flat Roof Repair in Woodstock MD 21163

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If you’re looking for flat roof repair information, you’ve come to the right place. The procedure varies with the type of roofing system, but here are the steps for the most common type where I live.

It is called “modified bitumen” (pronounced buy-TOO-men) and consists of a tough mat embedded in a special asphalt formula that includes elastic additives. That allows Rubber Roof Repair Woodstock MD 21163 the material to expand and contract with temperature changes. The surface is covered with ceramic granules to provide solar protection.

Modified bitumen or “modified” as it is usually called, is especially popular on small residential jobs. That’s because it doesn’t require a hot asphalt kettle along with the inherent safety hazards and obnoxious fumes.

Modified can be installed several different ways, but Woodstock MD 21163 one of the most common methods is with a propane torch. That is also the technique responsible for most of the leak problems with this system when the seams are not heated properly. If you overheat the material, too much asphalt flows away from the seam. Not enough heat results in cold seams that are not completely bonded. Either case Rubber Flat Roof Woodstock MD 21163 creates seams that are vulnerable to water intrusion. If the roof ponds water and the roofer didn’t install a protective mid-ply, leaks are nearly inevitable.

Fortunately, this is a fairly simple flat roof repair. You will need these materials:

Flashing cement. Be sure to get the MB (modified bitumen) variety, as the standard type is not 100% compatible.

Membrane. Either 4″ or 6″ Woodstock MD 21163 is fine, but be sure to get fiberglass rather than cotton, as it lasts a lot longer.

Granules. For a small repair, you might find enough loose ones on the roof or in the gutter to reuse.

Start by CAREFULLY probing the seams with a small pen knife, looking for voids. Ideally, the seams should have about ½” of asphalt bleed-out. Any Woodstock MD 21163 areas that don’t are suspect.

The seams need to be both clean and dry to get a good flat roof repair. Spread a thin layer of flashing cement directly over the problem area, slightly wider than your membrane. Test the bond you are making by “tapping” the cement with your trowel. If it comes up, leaving bare patches of modified, the Woodstock MD 21163 surface is still too wet or too dirty.

Next, keeping the membrane taunt, set it in the thin bed of flashing cement. Work it in with your trowel until the membrane is embedded tightly.

Then spread another layer of flashing cement over the membrane. Again, you don’t need a lot. Just enough to cover the scrim is sufficient.

To complete your flat roof Woodstock MD 21163 repair, broadcast granules into the fresh cement. That will dress up the repair and protect it from the sun.

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Maryland's Best Roofing and Siding

Repair Sepecialist

DWM Roofing


For quality workmanship and service for your residential and commercial Roofing needs, choose a company with over 38 years of service in the Woodstock area.

Highly Rated

Integrity, quality workmanship and attention to detail have made us one of the most reliable Roofing companies in Woodstock.

Quality Service

We focus on making the process as least disruptive as possible to our clients

Affordable Prices

We work hard to keep our costs low and transfer these efficiency savings on to our customers

100% Maryland Licensed Experts

We can complete any size project  in a timely manner, without skipping any steps  or cutting any corners.


(844) 359-2189