Blog » Why is my Home's Siding Wavy?

When a house is brand new, siding usually appears nice, clean and straight. However, over time, home siding may begin to bulge or wave leaving an unsightly exterior. This is natural, but it can indicate a problem that requires repair.

Understanding how siding warps, as well as when to fix it is critical to protecting your home.  

When a house is brand new, siding usually appears nice, clean and straight.  However, over time, home siding may begin to bulge or wave leaving an unsightly exterior.  This is natural, but it can indicate a problem that requires repair.  There are a variety of circumstances that may cause these changes, and it’s important to know why it’s happening. 

Siding transformations occur for a number of reasons.  It’s possible the siding wasn’t chosen properly for the home, or maybe it was poorly installed.  Perhaps the siding is being adversely affected by changes in the home’s foundation.  If there’s been a lack of maintenance, the siding may simply be aging right alongside the home.   Whatever the case, the siding on a home is a reflection of what’s underneath so it’s important not to neglect changes and deformities or you could wind up with a bigger problem.   

What causes siding to wave, ripple, and warp?  

Installation errors:  Nailing strips too tightly leaves siding unable to breathe and contract during temperature fluctuations.  Using siding strips that are too long causes it to push against the trim causing further damage.  Both of these installation errors lead to warped panels especially with vinyl siding.  

Temperature fluctuations:  It’s natural for siding to expand when heated and contract when cooled. Depending on your climate this can happen frequently and appear more noticeable.  Although there’s no way to prevent it, if you’re considering re-siding you can be more aware of what materials offer the best protection against the elements.  

Foundational changes:  Homes may settle and shift into foundation over time.  Although it’s very slight and unnoticeable, sometimes it’s ample enough to affect siding. When older homes experience movement it may lead the siding to sag and bulge.    

Siding problems may be more than just a cosmetic worry and normal part of aging.  They can suggest structural defects, moisture issues and other potential hazards.  When problems are caught early sometimes it’s as simple of a repair as replacing individual panels.   However, the longer siding is warped, the more likely it is to retain a deformed shape. Your best bet is to contact a professional siding contractor to assess damage and offer suggestions on repair/restoration work.  To schedule a free onsite estimate contact PRS Roofing and Siding today!