Repairing Shingle Blow Offs
Inside The Mind of a Roofer: Roofing Repairs-Blow Offs
Here in Utah we are in the middle of some very interesting spring weather! One day it is 80 degrees and the next it is snowing. With all of the drastic temperature changes happening in such a short amount of time we are seeing a lot of high winds. Nothing tests the integrity of your roofing system like wind. Shingle blow offs are the most common roofing problem associated with wind. However, wind driven rain can also find unique ways of making it inside of your roof. So let’s talk blow off repairs.
Why Blow Off Repair is Important
This is the most common type of roofing repair. The older your roof is the more susceptible it is to shingles blowing off. The reason for these blow-offs is almost always seal strip failure. Three tab shingles blow off considerably easier than architectural shingles, but the three tab shingles tend to lose tabs whereas the architectural shingles peel up completely leaving underlayment (in most cases tar paper) exposed. It is important to know that TAR PAPER IS WATER RESISTANT NOT WATERPROOF. Shingles keep the majority of weather off of the tar paper, and what little does get beneath the shingles is easily taken care of. This means that the longer the tar paper sits exposed the more likely it no longer does its job and keeps the water out.
Repair blow offs quickly in order to keep your roof watertight. The average blow off repair in this area is around $300. Factors that affect pricing:
1) Size of damaged area
2) Number of layers on the roof
3) Pitch (steeper=more expensive)
As with most service industry services there are minimums that apply. If you have one missing shingle the contractor still takes time to come to your house, match shingles, purchase shingles (which come in bundles that are approx. $30 each), and install shingles.
Should You DIY?
Youtube has several good videos on repairing blow offs. If you are savvy at working with your hands and have a good knowledge of available and appropriate building materials you can probably do this yourself. Keep in mind that Youtube contractors might be posting from different geographical locations than you are currently in, and the materials they recommend might not always be the best for your particular climate. I have bid thousands of roofs, and for the most part I rarely see DIY repairs done correctly. Don’t think that using a lot of tar or caulk makes up for knowing what you are doing! A good rule of thumb is that if you aren’t 100 percent sure that what you are doing is correct just call a contractor.