Maryland weather is tough on asphalt shingles. Between winter ice dams, spring hailstorms and humid summer heat, most roofs in Frederick County start showing their age around year 15. A failing roof leaks money into your utility bill long before it leaks water into your attic. Catching the warning signs early saves you from emergency repairs and interior damage.
Here are the seven signs we look for during every free roof inspection.
Walk around your house and look up. Shingles should lay flat and tight against the deck. If the edges are curling up or the center is cupping like a shallow bowl, the asphalt has lost its flexibility. Curling shingles no longer shed water properly. Wind gets underneath them and rips them off during the next storm.
Cupping usually points to poor attic ventilation. Heat builds up below the deck and bakes the shingles from underneath. A full replacement with proper ridge and soffit venting fixes the root cause.
Check your gutters after a heavy rain. If you see a layer of coarse black sand at the bottom, those are the granules that used to protect your shingles. Granule loss is normal in the first month after installation. It is not normal on a 15 year old roof.
Once the granules are gone, the asphalt mat is exposed to UV rays. The shingles dry out fast and start cracking. This is one of the clearest signs the roof has reached the end of its service life.
Head up to your attic on a sunny afternoon and turn off the lights. If you can see pinpoints of daylight through the decking, water is already getting in. Even small gaps let moisture soak the insulation and grow mold inside your wall cavities.
Bring a flashlight and look for dark stains on the rafters. Those stains are a roadmap of every leak you did not know you had.
Step across the street and sight down the ridge of your roof. It should be perfectly straight. Any dip, wave or sag means the decking below is wet and rotting. Sagging is serious. It means you have hidden structural damage and the roof could fail during the next snow load.
Do not wait on this one. Call a licensed roofer the same week.
Maryland humidity is a perfect breeding ground for moss. A little green streaking on the north face is cosmetic. Thick clumps of moss are not. Moss holds moisture against the shingle surface 24 hours a day. That constant dampness accelerates granule loss and rots the wood deck underneath.
Pressure washing moss off is a bad idea. It strips granules and voids most shingle warranties. Replacement is the honest answer once moss has taken hold.
Flashing is the thin metal trim around chimneys, skylights, vents and valleys. It is the most common failure point on any roof. Look for rust, cracks, gaps or flashing that has pulled away from the wall. Old roofing tar used to seal these joints turns brittle and fails around year 10.
If the flashing is shot and the surrounding shingles are also aging, it makes more sense to replace the whole roof than to patch it piece by piece.
Most architectural asphalt shingles in Maryland last 18 to 22 years. Three tab shingles last even less. If your roof is past the 20 year mark and you are seeing any of the signs above, you are living on borrowed time.
Check your closing documents or ask a neighbor who has lived on the block longer than you. An older roof also drives up your homeowners insurance premium. Some carriers now refuse to renew policies on roofs over 15 years old.
Not sure where your roof stands? We offer free, no pressure roof inspections across Frederick, Urbana, Mount Airy, Walkersville and the surrounding areas. Our team documents every finding with photos so you have a clear picture of what the roof actually needs.
Learn more about our roofing services or contact us today to schedule your inspection. We will tell you if your roof has another five years left. We will also tell you if it does not.