curled shinglesA roof replacement can be handled two ways when there is one layer of asphalt shingles on your home; a complete roof tear off or install the new roof over the old one. Some argue that the cost of the tear off (removal of the existing roof) isn’t worth the added expense but we disagree. Here are five reasons you should consider a complete tear off rather than re-roof on top of your existing shingles.

  1. Added weight – 100 square feet of shingles weighs about 200 pounds so an average size roof in our area might weigh as much as 5000 pounds. When you choose to do an overlay, you’re adding stress to the structure of the roof. This may not be a big deal most of the year but if we have a big snowstorm and you’ve added the second layer of shingles and several feet of snow, the increased weight may cause big problems for your home.
  2. Rot from the inside out – Although your roof may look just fine, there may be fungus, mold, or mildew on the roofing surface. If you choose an overlay, your new roof is going to be contaminated by that and will essentially rot from the inside out.
  3. Unknown roof deck issues – A good roofing contractor will inspect your roof both by walking on it and from the attic. When a roofer walks on your roof and finds a spongy spot, that is indicative of an issue below the shingles. Without tearing off the shingles and repairing that area, you can’t know what the problem is or how wide-spread.
  4. Shingles need a flat surface – There are many reasons for a roof replacement but when one of them is curled, bent, missing, or misaligned shingles. With an overly, your new roof won’t have a flat surface on which it is installed. Without a flat surface, it will never look good or perform as it should.
  5. Warranty – This is perhaps the biggest reason to consider a complete tear off for your roof replacement. Depending on the product you choose you may lose many warranty benefits. Be sure to ask your roofing contractor about the warranty implications if you choose a roofing overlay.

Questions? Call Frank-Dale Exteriors

We’re your local roofing contractor and we’re always straightforward with our quotes. Rarely do we suggest an overlay. We strive to ensure that every homeowner understands our roof replacement recommendations. Our experienced staff will ensure that your roof repair or replacement is done to the highest standards. Call for your free estimate today at 414-425-5796.