There may come a point in time when you notice that your vinyl siding is bulging. Damage to your exterior is never a pleasure to deal with, but knowing the source and understanding its cause can help prevent it in the future.

Make sure you inspect your siding every quarter for potential issues. When siding is damaged, you’ll find bulging and wavy pieces, gaps, exposed nails, water stains, mold and mildew, and even a chalky substance on the exterior. 

  1. Heat Source Such as a Grill or Fire Pit - Now that the summer season is coming to an end, you may have spent time grilling or sitting around the fire. Unfortunately, if a heat source is too close to your home, it may damage your siding and cause it to warp. This is a sign that the vinyl is melting from intense heat, so be sure to move your fire pit or grill away from your siding next summer.
  2. Water Damage - This is one of the most common reasons why siding may bulge. You may also spot gray, black, or white areas on your siding—which is an indication of mold and mildew. Moisture behind the panels will result in warping. A quick approach to fix this is to install a plastic house wrap to keep moisture out from behind the panels. However, not only is this unsightly, it’s also a temporary solution. Replacing or repairing the siding is the best course of action.
  3. Insect Damage - While this doesn’t happen very often, it’s possible that insect damage can cause problems with vinyl siding. This is because termites or other insects cause damage to the structure of your home, which compromises the structural integrity of the vinyl siding. This will quickly result in warping or peeling.
  4. Your Home Doesn’t Have Proper Flashing - Flashing is a thin strip of water-resistant material. It’s installed at roof intersections, as well as around windows, doors, and tops of the foundation. It helps direct water flow water away from the home and prevents long-term water damage. - If lack of flashing is causing your siding to bulge, you’ll need to add new flashing as well as repair the damaged siding. There are times when you can pull the siding back down and reinforce it, but other times bulging siding is better off being replaced. Both repair and replacement is a risky task for homeowners, especially since it can void your warranty if you tackle it on your own. 

Before you make any decisions about replacing siding that’s bulging or otherwise damaged, be sure to contact the manufacture or a siding installation company first.