Roofing Repair Q&A in Cottage Grove, WI
Rubber roofing has blisters and is swelling. Is it serious enough to have a roofing contractor take a look at it?
Absolutely! Swelling or blistering is a sign of moisture infiltrating the roofing membrane.
Any type of soft flat roof, such as rubber roofing or asphalt, is susceptible to blistering or swelling. It’s not a normal occurrence, so it’s an issue you should address right away. Swelling and blistering will worsen if not fixed, and the longer you wait, the more expensive the repair will be.
There are multiple reasons a flat roof would start to blister or swell. Here are a few of the most common causes:
- Moisture collects beneath the rubber membrane either from a crack in the membrane, at a seam or near chimneys/vents/flashing.
- Plywood sheathing may have expanded because of water damage and/or changing weather conditions. Plywood sheets are supposed to be spaced about 1/8 inch apart to allow for expansion/contraction, but sometimes it is improperly installed.
- Certain types of rubber roofing, namely EPDM, can 'bubble up' when exposed to certain chemicals, such as refrigerants, grease and oils.
No matter what the cause, it’s important to address the issue as soon as possible, so that a small roof leak doesn't turn into a major expense, like a full roof replacement.
Average cost for repairs of a leaking shake roof
As with any roofing material, shake roof repair costs in Cottage Grove can vary depending upon several influencing factors including, the type of shake roof you have and the extent of the damage.
In general, sealing up a small section of wood shake roof will cost slightly more than it would for an asphalt shingle roof. For example, installing new asphalt shingles in a 25 square foot section of the roof can range in price from $200 to $400 while repairing a section of a shake roof of the same size can cost $300 to $600. It’s best to get a free quote from a local roofing contractor to get a more accurate estimate.
Read more about roofing repair here