When considering roof work, many homeowners inquire whether a new layer of shingles can simply be placed over the old ones—a practice known in the industry as a “roof-over.” However, this approach often meets resistance from professional roofing contractors. Let’s delve into the reasons why experts typically advise against roof-overs.
Reduced Roof Lifespan
Professional roofing contractors emphasize the long-term viability of a roofing system. A roof-over doesn’t address the underlying issues of the old roof, such as water damage, weakened decking, or concealed mildew and rot. By layering new shingles over old ones, the structure’s longevity is compromised, potentially leading to more extensive roof repairs for residents down the line.
Masking Problems Rather Than Fixing Them
One of the major reasons roofing contractors advise against roof-overs is that they merely mask underlying issues rather than fixing them. Roof replacement not only ensures that any structural damage is addressed but also allows for a thorough inspection of the roofing deck and underlayment. By stripping the old materials away, roofers can identify and rectify any hidden problems, ensuring a more secure and stable roof.
Extra Weight and Stress
The weight of multiple shingle layers can place undue stress on the structure of a home. This is especially true in areas with varied climates, where the additional strain can lead to premature wear and potential structural concerns. Roof replacement typically involves removing the old shingles, thus preventing any additional weight on your home’s framing and foundation.
Voided Warranties and Building Code Violations
Many shingle manufacturers void the warranty if their products are installed over existing layers. This can leave homeowners without protection should their new shingles fail prematurely. Furthermore, local building codes may limit the number of shingle layers or completely prohibit roof-overs, making it crucial to consult a knowledgeable roofing contractor.
For a roofing system that stands the test of time and the rigors of the Iowa weather, trust Genesis Roofing. Give us a call at (515) 202-1667 or visit our contact page to schedule an appointment.
