Replacing An Asphalt Roof: A Homeowner's Guide
Asphalt roofs do not last forever, so the time will inevitably come when you need roof replacement for your home. A new roof will not only keep you and your family comfortable and dry but will also add to your home's curb appeal. This article takes a look at some key considerations homeowners need to think about when replacing their asphalt roof.
Homeowners are not always sure when to replace a roof. One key factor is its age. Asphalt roofs tend to last 20 to 25 years. If your roof is this old or older, it may be time for a replacement. If a lot of your shingles are losing the granules on their surface, this indicates a new roof is needed as well. Other signs include having a significant number of shingles that are cracked or buckled. Also, check your attic for signs of any serious roof leaks, such as water stains and rotting sheathing.
Install Over Old Roof
It's often advantageous to simply install the new roof directly over the old one. This avoids the expense of tearing off the old shingles and disposing of them. Putting a new roof on over the old one is usually practical if you only have one layer of shingles under the new roof. When the installation is done properly, the old roof provides extra protection for your home against rain and moisture. Local building codes typically allow this technique if no more than two layers of shingles in total are placed on a home, but check with your local building department before starting any work to be sure.
One mistake you to want to avoid is installing a new roof on wood sheathing that is either decaying or in disrepair. This can easily reduce the lifespan of the new roof and lead to costly repairs. Make sure that your contractor inspects all of your sheathing before the installation begins.
In some cases, an important factor to consider when replacing a roof is the wind resistance of the shingles. Most shingles will have a wind resistance rating of at least 90 mph, but in certain areas prone to strong winds or hurricanes, higher wind resistance ratings such as 120 mph or 150 mph could be needed or required by local building codes.
For more information about installing a replacement roof on your home, contact a qualified roofing contractor in your town.