What are intake and exhaust vents?
Intake vents let air in, often near the roof edge. Exhaust vents let air out, often near the top. Both must work together. Ask which paths your home uses and whether insulation or other materials block them.
Help the Roofing System Breathe.
Attic airflow and roof ventilation can affect heat, moisture, and roofing-system performance. We can evaluate visible ventilation conditions as part of the roofing conversation and explain any recommended changes in the written scope.
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Return to the HomepageKnow What Happens Before You Say Yes.
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Inspect
We look at the roof and document the concern.
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Explain
We show you what we found in plain language.
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Compare Options
Repair, monitor, or replacement—when more than one path is reasonable, we explain the tradeoffs.
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Review the Written Scope
Understand what is included, the roofing system, project details, and applicable written guarantees.
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Schedule and Build
Your local team coordinates the project and keeps you informed.
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Final Walkthrough
Review the completed work and any homeowner care information.
See how it works
A clear path from the eaves to the ridge.
Fresh air needs a way in and a way out. See how a typical vented attic moves air without heating or cooling the space below.
Three parts. One planned system.
Air sealing closes unwanted gaps between your rooms and the attic. Insulation slows heat movement. Ventilation gives outdoor air a planned path through a vented attic.
Adding an exhaust vent alone will not fix blocked intake or a bathroom fan that releases moisture into the attic. Your advisor should look at the whole arrangement.
Explore the cutaway ↓1Intake: air enters low
Soffit or other approved intake vents bring outdoor air in near the eaves. Paint, debris or insulation can block the openings.
2Baffles: keep the path open
Rafter baffles hold insulation away from the airflow path. They help air pass the eaves and enter the attic.
3Exhaust: air leaves high
An appropriate high exhaust, such as a ridge vent, lets air leave. Intake and exhaust must be sized and arranged for the roof.
4Insulation: keep it at the right boundary
In this example, insulation sits on the attic floor above the rooms. It should not be pushed into the soffit openings.
5Air sealing: control unwanted leaks
Gaps around ceiling penetrations can carry warm, moist indoor air into the attic. Ventilation is not a substitute for air sealing.
Not sure what your attic needs?
Tell us about hot upstairs rooms, moisture or winter ice. We can explain the accessible conditions and what belongs in your written roofing scope.
Read the moisture and ventilation guide →Learn more: ENERGY STAR attic ventilation guidance ↗
Frequently Asked Questions
Will ventilation be reviewed with my roofing project?
Ask your team to explain the visible ventilation conditions and any recommended changes included in the scope.
Ready to Understand What Your Roof Needs?
Start with a no-obligation inspection and a clear conversation about the next step.
What does roof ventilation do?
In a vented attic, air enters low and leaves higher up. The goal is a planned path for airflow. The right approach depends on how your attic and roof are built.
Will more vents solve the problem?
More is not always better. Different vent types may not work well together, and some attic designs are not meant to be vented in the same way. Ask for a plan that fits your roof, attic and product requirements.
How do insulation and airflow work together?
Insulation slows heat movement. Air sealing closes unwanted gaps. Ventilation manages a planned air path. These are different jobs. Ask the team to consider them together, especially if you notice moisture, drafts or uneven room temperatures.
What should I mention at an inspection?
Tell the team about musty smells, visible moisture, past attic work or rooms that are hard to heat or cool. These clues do not identify the cause on their own. A review of accessible conditions can guide the next step.
What to ask before you decide
- Where does air enter and leave my attic?
- Are any airflow paths blocked?
- What changes are included in the roofing scope?