What voids a roof warranty is usually something a homeowner did with good intentions: letting another trade cut into the roof, pressure washing shingles, blocking attic vents, or never registering the warranty at all. Plenty of coverage problems start with paperwork and outside work, not weather. Here are the eight mistakes to avoid and what to do instead.
Why small things can void a roof warranty
A shingle manufacturer's warranty covers defects in the product. A contractor's workmanship warranty covers the installation. Both assume the roof is left as it was installed and maintained reasonably. Anything that changes the system, or makes it hard to tell whether a failure came from the product or from something done later, gives the warranty holder a reason to deny a claim. Our article on workmanship vs. materials warranties explains the two layers in more detail.
Have a question about coverage on a roof Cannon installed? Call us at (940) 627-1045 before anyone touches it, or send a note through our contact page.
Mistakes that come from other people working on your roof
1. Repairs by someone other than the installer
A handyman patch or a different roofer's repair can void a workmanship warranty and complicate a manufacturer claim. If something goes wrong on a roof that is still under warranty, call the installer first.
2. New penetrations
Satellite dishes, antennas, bathroom vents, flue pipes, security cameras and solar mounts all involve holes in the roof. Done poorly, they leak, and the warranty holder will not pay for someone else's hole. See our guide to satellite and antenna penetrations before you let an installer drill.
Solar and HVAC equipment
Panels and rooftop equipment should be mounted with flashing the roofing manufacturer accepts. Ask the installer to coordinate with your roofer before the work, not after the first leak.
Before you sign with another installer
Ask the dish, camera or solar company how they seal their mounts, whether they carry insurance, and whether they will put their flashing method in writing. Share that with your roofer. It takes a phone call and can save a denied claim later.
3. Walking and storing things on the roof
Holiday light installers, painters and chimney sweeps walking in hot weather can scuff granules and crack tabs. Ask anyone going up to use care and to keep off the roof in peak afternoon heat.
Mistakes in cleaning and upkeep
4. Pressure washing shingles
High-pressure water strips granules, which protect asphalt from UV. Manufacturers generally advise against it. For algae streaks, use a method the shingle maker approves; our article on safe roof cleaning methods covers the options.
5. Ignoring small problems
Warranties typically exclude damage caused by neglect. A lifted shingle after a North Texas wind event or a cracked pipe boot left for months can let water rot the deck, and that damage may not be covered.
6. Painting or coating shingles
Sprayed-on paints and elastomeric coatings change the product and are generally not approved over asphalt shingles. Some can trap moisture in the shingle layer, and once applied they are very hard to remove. If someone offers to paint your roof to freshen it up, ask for the shingle manufacturer's written approval first.
Mistakes in the attic and on paper
7. Blocking ventilation
Adding insulation that covers soffit vents, closing off ridge vents, or adding a powered fan that fights passive vents can cook shingles from underneath in Texas summers. Manufacturers expect ventilation to meet their requirements, and poor ventilation is a common exclusion.
8. Never registering the warranty
Some manufacturer warranties need registration after installation to be fully in force. Keep the contract, invoice, product names and any registration confirmation in one folder.
What a warranty never covered in the first place
Some claims are denied not because coverage was voided, but because the problem was never covered. Hail, high wind beyond a shingle's rating, falling limbs and other storm damage are insurance matters. Normal weathering over time is not a defect. Knowing what voids a roof warranty, and what it never covered, keeps you from filing the wrong claim and losing time. If a storm has hit, start with an inspection and your homeowners policy, not the warranty.
How to keep your coverage intact
- Call the installer first for any repair while the roof is under warranty.
- Tell your roofer before anyone adds equipment to the roof.
- Get a professional inspection after hail or high wind, and keep the report.
- Keep gutters clear and vents open.
- Store every document from the job, including photos.
Regular professional attention helps too. Our Roof Protection Plan is built for homeowners who want someone keeping an eye on the roof. Cannon Roofing has worked in Wise County and North Texas since 1994, every employee holds the Technician Seal of Safety, and we stand behind our work with written warranties. For our coverage details, see our roofing warranties page rather than relying on a summary.
Frequently asked questions
Does a small repair by another roofer void my warranty?
It can, especially for workmanship coverage. Read your warranty and call the original installer before letting anyone else work on the roof.
Can I clean algae off my roof without voiding the warranty?
Usually, if you use a low-pressure method the shingle manufacturer approves. Avoid pressure washers and harsh scrubbing.
Does adding solar void a roof warranty?
It can if the mounts are not flashed and installed to the roofing manufacturer's requirements. Coordinate with your roofer first.
Want to keep your warranty in good standing? Call Cannon Roofing at (940) 627-1045, any hour of the day. We will inspect the roof, point out anything that could put coverage at risk and handle repairs properly. You can also contact us through the Cannon Roofing contact page.