Installing a new roof on top of an old one is sometimes seen as a cheaper, faster way to replace a roof. This method is known as overlaying. However, it can bring about issues that impact the lifespan of the new roof and cost more in the long run.
At Level Up Improvement in Dearborn, we specialize in roofing services and offer some valuable insights into roof installation.
For starters, it’s a good idea to remove the old roof before installing a new one due to the following reasons:
Structural Integrity
Having multiple layers of roofing materials weighs down your home’s structure. Most structures support a certain weight limit. Adding another layer can surpass this – especially when you factor in rain or snow weight too. Over time, this extra weight may cause the roof structure to sag or, in worst cases, collapse – a serious safety concern.
Warranty and Compliance Issues
New roofing material warranties often require installation on a bare, clean surface for proper adhesion and performance. Installing over an existing layer can void the new roof’s warranty. Plus, many areas like Michigan have building codes limiting allowed roof layers or prohibiting overlays altogether.
Hidden Damage
Installing a fresh roof over aged shingles shields underlying issues: water deterioration, rot, mold – in the decking and underlay. If they can’t be seen they won’t be fixed, leading to ravaging structural integrity, decreasing new roof life. Stripping existing roofing permits thorough inspection, ensuring any hidden issues are remedied before replacement.
Roof Performance
Layering new shingles atop old compromises ventilation, insulation – impacting energy efficiency, fostering moisture buildup. This risks indoor mold growth, air quality decline. Also, new shingles may lie unevenly, diminishing aesthetic appeal and shortening usable roof life.
If your roof isn’t doing what it’s supposed to do, energy costs will rise, and indoor temperatures will fluctuate making your level of comfort less than desired.
Cost in the Long Run
Though overlaying saves initially, costlier repairs or premature replacement loom – disposal fees for multiple layers likely exceeding single-layer removal costs initially avoided. Removing old roofing before a new roof installation provides solid structural foundation, meets warranties/codes – ultimately cheaper, hassle-free longevity.
Ask a Roofing Professional
At Level Up Improvement, we prioritize roofing investments’ enduring safety. Stripping aged materials safeguards structural soundness, ensures code/warranty compliance – saving money, headaches long-term.
Speak to one of our roofing experts about our home improvement services and schedule a roof inspection to ensure the safety and efficiency of your home. We have a team that is passionate about living comfortably and it all begins with the integrity of your roof.
We also specialize in siding installation and repair, insulation installation, windows, doors and more!