Common Roof Issues - Wind Scouring of Granules in Roofing Materials
Wind scouring of granules is a subtle but destructive problem for roofs in windy regions like Central Texas. When strong winds whip across asphalt shingles or BUR (built-up roofing) systems, they can dislodge the protective granules or gravel that guard your roof against the rain and sun's harmful UV rays.
If you have one of these types of roofing systems, it's important to know the signs and safeguard against this unique form of storm damage so that premature granule loss doesn't become a serious problem. From causes and risks to realistic fixes and proactive prevention, here's what Austin property owners need to know.
Did the wind knock granules loose on your roofing materials?
Schedule a Free Roof Inspection For an Estimate on Roof Repair
How Wind Scouring Roof Damage Happens
If you've lived in Central Texas for just a few months, then you've probably already experienced the strong winds that can blow through even when there isn't severe weather. It's so common that the local weather forecast often includes wind speeds. It's the kind of climate conditions that set the stage for wind scouring that happens because:
- Strong Gusts Pull Granules Away: When winds are strong they can strip off the small ceramic granules on shingles or remove gravel on flat roofs. This is wind scouring, and it usually happens during storms, sustained high winds or in areas with constant wind exposure.
- Gradual Erosion: Unlike obvious wind uplift that tears shingles, scouring can be gradual and less noticeable, but it exposes the roof surface over time.
- Debris and Foot Traffic Amplifies the Effects: Windblown branches, leaves and grit cause further damage, accelerating the granule loss. Foot traffic can also add to the problem.
How Shingle Granule Loss Damages a Roof
No one wants to deal with premature roof replacement or major roof repairs. But that's exactly what can happen if you experience wind scouring of the granules on your roof.
- UV Degradation: Reflective granules protect asphalt from the sun. When they're gone, the roof surface becomes vulnerable to UV rays, which dry out and crack the substrate, accelerating aging and water infiltration.
- Increased Moisture Penetration: Without the granules, water sheds less effectively, leading to roof leaks, mold growth and rotten roof decking.
- Shortened Roof Life: Granule loss is often a sign that the roof is approaching the end of its useful life and needs prompt attention. Bare spots can also cause shingles to curl, crack or buckle.
- Reduced Fire Resistance: Another result of significant granule loss is reduced fire resistance.
- Clogged Gutters and Downspouts: If there's heavy rain after a strong wind blows through granules can shed into gutters and clog the drainage system causing it to overflow or water to pool on the roof.
How to Repair Wind Scouring Damage
The following table outlines common wind scouring problems, their signs, and appropriate repair solutions:
| Problem Type | Signs | Repair Solutions |
|---|---|---|
| Local Granule Loss | Bald patches, granules in gutters and the yard | Replace affected shingles or apply specialized roof coatings to protect exposed areas |
| Extensive Granule Loss | Widespread balding, leaks, UV damage | Replace large shingle sections or full roof replacement if the underlying substrate is exposed |
| Gutter/Downspout Clogs | Overflow, sediment buildup | Clean gutters and install guards to keep granules and debris out |
Preventing Wind Damage on Asphalt Shingle Roofs
The best way to avoid a roof installation and extensive roof repairs from excessive granule loss is by taking preventative measures. You can't control wind speeds but you can minimize wind stress by:
- Choosing Wind-Resistant Shingles: Opt for roofing products that are rated for high wind environments, with strong adhesive seals and heavier granule bonding.
- Scheduling Regular Inspections: Schedule regular roof inspections after major wind events and at least twice a year to spot warning signs and catch problems early.
- Controlling Tree and Debris: Trim branches away from the roof and clear debris to minimize abrasion and scraping on the shingle surface.
- Practicing Good Gutter Maintenance: Keep gutters clear and use guards to prevent granule buildup and clogs.
- Ensuring Proper Roof Installation: Ensure roofing is properly installed and nailed according to manufacturer specifications to resist wind-driven wear.
Wind scouring is often overlooked, but its long-term effects can destroy the roof's protective layer that's there to defend against the elements. Quick repairs and ongoing maintenance go a long way in preserving roof health and protecting your property.
The professional roofing contractors at LOA can make timely repairs if your roofing starts to shed granules after a wind storm. We can also help out if there's widespread granule loss, loose shingles or missing shingles that need to be replaced. If you're in the Austin area you can contact us online to schedule a free inspection or call us at 512-375-3654.
