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A St. Louis attic takes a beating. July hits the upper 90s and that heat sits in your attic like an oven. Come January, warm air leaks up from the house, melts the snow on your roof, then it refreezes at the cold eaves and backs water under your shingles. Both problems come down to the same thing: air isn't moving the way it should.
Good ventilation needs two parts working together. Cool air comes in low through the soffit vents, and hot air pushes out high through ridge or box vents. When the intake is blocked by insulation, or somebody added a powered fan without enough soffit to feed it, the whole system stalls. A roofer climbs into the attic, checks the temperature and moisture, looks for blackened sheathing or rusty nails, and counts what venting you actually have against what the roof size calls for. Then we tell you straight what's off.
Older homes on The Hill, in Tower Grove, and around Soulard often have little to no soffit venting because they were built before anyone worried about it. Newer builds out in Chesterfield and Kirkwood sometimes have vents that got painted or stuffed shut. We match the fix to the house: adding soffit intake, cutting in a ridge vent, or clearing baffles so the air has a clear path from eave to peak.
Left alone, poor airflow warps decking, cooks your shingles from underneath, and grows mold on the underside of the roof. Fixing it protects the roof you already paid for and takes a load off your AC in the summer. We walk the attic with you and show you what we found before we touch anything.
When to call us
Upstairs rooms stay hot no matter how hard the AC runs
Frost or damp wood on the underside of the roof in winter
Ice building up along the edge of the roof after snow
A musty or moldy smell coming from the attic
Soffit vents that look painted over, clogged, or missing
Curling or blistered shingles on a roof that isn't old
Attic ventilation jobs we handle in St. Louis
Attic walk-through to read temperature, moisture, and airflow
Check that soffit intake matches ridge and box exhaust
Clear insulation and debris blocking soffit vents
Install baffles to keep air moving from eave to peak
Cut in ridge vents or add box vents where exhaust is short
Look for mold, rusted nails, and warped decking while we're up there
Not sure which one you need? Call and describe what's going on. We'll confirm the scope and give you a free, no-obligation quote before any work starts.
Common questions
How do I know if my attic has enough ventilation?
A quick test: on a hot afternoon, feel how warm the attic is compared to outside. If it's dramatically hotter or you spot damp wood in winter, the airflow is off. The real answer comes from counting your intake and exhaust vents against the square footage of the attic floor. A roofer measures both and tells you if you're short on either side.
Will fixing ventilation lower my cooling bills in the summer?
It can help. When hot air escapes the attic instead of baking against your ceiling, the AC doesn't fight as hard on those St. Louis July days. Ventilation and attic insulation work together, so we look at both while we're up there.
Can you add ventilation without replacing the whole roof?
Usually, yes. Ridge vents, box vents, and soffit intake can all be added to an existing roof. We only bring up replacement if the decking is already rotted or the roof is failing for other reasons, and we'll show you the damage first.
Do you cover my part of the metro?
We work across St. Louis and the suburbs, including Clayton, University City, Webster Groves, Maplewood, Dogtown, Ferguson, Florissant, and out to Chesterfield. Call and we'll get a roofer out the same day when we can.