Roof replacement
Attic ventilation
Attic ventilation balances intake air at the soffits with exhaust at the ridge or roof vents, carrying heat and moisture out of the attic. Good ventilation extends shingle life, prevents decking rot and is required by most shingle warranties.
- Typical time
- A few hours, or during a re-roof.
- Repair or replace
- Upgrade ventilation during a re-roof.
In Southeast Texas summers, an unvented attic can pass 140°F, cooking shingles from below. Humid air condensing on decking in cooler months rots it from the inside.
More vents isn't always better: mixing ridge vents with power fans or gable vents can short-circuit airflow. Balanced intake and exhaust is the goal.
Attic Ventilation at a glance
- What it is
- Attic ventilation balances intake air at the soffits with exhaust at the ridge or roof vents, carrying heat and moisture out of the attic.
- Service category
- Roof Replacement
Signs you need attic ventilation help
- Very hot upstairs rooms
- Curling shingles on a newer roof
- Rust on nails or dark decking in the attic
- Blocked soffit vents
Quick answers
Attic Ventilation: the short version
How long attic ventilation takes
A few hours, or during a re-roof.
When attic ventilation can wait, and when it can't
Not urgent, but it affects shingle life and energy use.
Fix or replace attic ventilation?
Upgrade ventilation during a re-roof.
Why attic ventilation happens
Insufficient intake, blocked soffits, conflicting vents.
The work
What the roofer does
- 1
Evaluate
Attic size, intake and exhaust measured.
- 2
Design
Ridge vent and soffit intake sized for balanced airflow.
- 3
Install
Vents cut in, baffles added, conflicting vents closed.
What moves the price of attic ventilation
Driven by attic size and vent work.
- Attic size
- Soffit intake availability
- Ridge vent length
- Baffles and insulation work
Attic Ventilation: common questions
Should I install a power attic fan?
Often not with a ridge vent — the fan can pull air from the ridge instead of the soffits. Balanced passive ventilation is usually better.
Does ventilation affect my shingle warranty?
Yes. Most manufacturers require ventilation that meets code; poor ventilation can void coverage.
Service area
Attic Ventilation across the Golden Triangle
Related
Services often paired with attic ventilation
Asphalt Shingle Roofing
Asphalt shingles are the most common roof in the Golden Triangle.
Learn more
Roof Decking Replacement
Roof decking (sheathing) is the plywood or OSB the shingles are nailed to.
Learn more
Soffit & Fascia Repair
Fascia is the trim board behind the gutters; soffit is the underside of the roof overhang.
Learn moreGuides
Reading on attic ventilation
Call about attic ventilation
Insufficient intake, blocked soffits, conflicting vents.