A Crash Course in Roof Venting - Fine Homebuilding
Vent the roof deck. If the attic space is going to be conditioned, either for living or mechanical purposes, or if a home design calls for a vaulted ceiling, provision R806.3 in the International Residential Code calls for the roof deck above the space to …
Understanding Types of Roof Vents - Fine Homebuilding
2023年10月12日 · A hip vent should be installed in the upper part of the hip, according to GAF. For roofs that run into walls, Cor-A-Vent developed the Roof-2-Wall vent that fits over a slot cut in the roof sheathing just below the roof-wall intersection. The rafter bays that normally would simply stop at the wall line now have a way of exhausting air.
Vent Flashing Done Right - Fine Homebuilding
Back up roof vent boots with flashing, counterflashing, and proper shingling to prevent leaks. By Mike Guertin Issue 276 - July 2018 Synopsis: Mike Guertin describes his method for flashing roof vent boots, a main source of roof leaks.
Step-by-Step Ridge Vent Installation Instructions
Then they nail it along the edge every 6 to 10 inches. When ridge vent installation is performed correctly, the vent increases the home’s energy efficiency and extends the life of the roof. The next step is to cap the ridge. The ridge cap used on this roof comes in 3-ft. shingles which are perforated to be broken into 12-in. squares.
Vented and Unvented Roofs - Fine Homebuilding
Installing a prefabricated vent baffle (above) is certainly the fastest and perhaps the most cost-effective way to create a vent channel: Staple prefab baffles between rafters and use canned spray foam to air-seal baffle edges. Insulating under the roof is the conventional way to go and probably the most affordable if the roof is in good shape.
A Guide to Better Boot Flashings - Fine Homebuilding
In “Plumbing Vent Flashing Done Right,” I described the way I flash the plumbing vent pipe to the roof shingles as a second line of leak defense in the event the rubber collar on a pipe boot flashing splits or is damaged. This raises the question: If ordinary boot flashings are not durable, shouldn’t we use better-designed and ...
Roof Vent Retrofit from the Outside In - Fine Homebuilding
A quick note on the depth of the vent baffles: The IRC calls for a minimum ventilation space of 1 in., though building scientists suggest leaving a 2-in. vent space for better airflow. Since the distance between the roof sheathing and top plate on this and most other low-pitch roofs is cramped, a deep vent channel reduces the space for insulation.
Should I Close My Attic Gable Vents? - Fine Homebuilding
Adding a ridge vent is a fine idea, and don’t worry about it competing with the gable vents. If the gable vents aren’t letting in rain or snow, leave them alone. Roof ventilation is a complex topic, particularly for cathedral ceilings where there is no attic between the living space and the roof.
Should I Vent a Roof Insulated With Spray Foam?
I asked a GAF engineer recently if they are warrantying spray foamed roof decks?, his answer was no unless the roof sheathing was ventilated. When a homeowner request this I always let them know these facts. Typically I will install poly vents at the underside of the sheathing, soffit vents, and ridge vent to have a ventilated roof deck.
Rules for Rooftop Solar - Fine Homebuilding
The vent, when protected from snow closure by the panel design, can be cut down from the minimum height of 6 in. to a height of only 2 in. above the roof. The vent opening must communicate with outside air over an area no less than the …