THE ROOF, EXPLAINED · A VISUAL GUIDE
A good roof needs
room to breathe.
Roof and attic ventilation in Western Washington
What happens beneath the shingles matters, too. In a vented attic, a clear route for outside air helps manage heat and moisture. But vents are only one part of the picture.
What should I watch for?Start low. Soffit or other designed intake vents let outside air enter near the roof edges.
THE SHORT ANSWER
In a vented attic, intake, an open air path and exhaust work together. Air sealing limits unwanted air from the rooms below; insulation slows heat transfer.
WHY IT MATTERS HERE
Moisture has more than one way in.
During cold weather, warm, moisture-laden air from the house can reach the attic and condense on cold roof surfaces. Controlling that air leakage and providing suitable ventilation both matter.
For a home in Lakewood, Tacoma or the surrounding communities we serve, an inspection should consider the moisture source as well as the roof. A water stain alone cannot tell you whether the cause is rain entry, condensation or another problem.
Our roof leak vs. attic condensation guide explains the clues to discuss with John.
OBSERVE FIRST
What is worth a closer look?
These are reasons to ask for an assessment, not a diagnosis you need to make yourself.
Recurring dampness
Repeated moisture, staining or frost on attic surfaces deserves investigation. Note when it appears and whether it follows rain or colder weather.
A blocked air route
Insulation covering soffit openings can restrict airflow. Baffles can keep the intended passage open while insulation stays in place.
Exhaust ending inside
Bathroom and other exhaust fans should discharge outdoors, not into the attic. Ask where the duct actually terminates.
Share observations or photos you already have. You do not need to climb onto the roof or enter an attic with unsafe access to request an inspection.
BEFORE ADDING VENTS
Start with the design.
Then choose the fix.
Counting the vents you can see is not enough. The proposed intake and exhaust need to suit the roof, with a usable route between them. Ask how the existing arrangement works before agreeing to add or replace a vent.
A roofing proposal is a good place to make this clear: what stays, what changes, and why? See our roof proposal checklist for the other details worth putting in writing.
Does every attic need this airflow?
No. A properly designed unvented attic uses a different assembly, generally with insulation and air control at the roofline. Do not add vents to a sealed attic simply because a diagram shows them. Confirm which system your home has.
Would a powered attic fan solve it?
Not automatically. ENERGY STAR notes that a fan can draw conditioned air out of the house if the attic is poorly sealed and its intake is blocked. Check air sealing and the ventilation path before treating a fan as the answer.
Will better ventilation stop a roof leak?
Ventilation does not repair failed flashing or damaged roofing. Find the source of the water first. If roof work is needed, our repair vs. replacement guide can help you frame the next conversation.
BRING THESE QUESTIONS
Ask about the whole attic,
not just the vent.
- Is this a vented or unvented roof assembly?
- Where does air enter, travel and leave?
- Could air leakage or an exhaust duct be adding moisture?
- What work is included, and does another trade need to be involved?
Start with what you have noticed.
John can discuss the roof concerns and the next step with you. You do not need to know which vent or repair to request.
John will follow up to discuss your request and coordinate the next step. Sending a request does not book an appointment.