Venting Into Roof Space

Vent the roof deck.

Venting into roof space.

Venting into the attic sends excess moisture to that space which can cause mold and other problems. It is likely that even of an air change per hour would be adequate for an attic space but each ventilation design must take into account the type of roof the design of the building and the site environment. And many building codes require discharging exhaust to the building s exterior so it s just a good rule of thumb. Roof vents help make a home more energy efficient and allow humidity and hot air to escape the.

I ve just moved into a new build property 3 storey terrace with bathroom and ensuite on top floor after climbing into the loft to install a tv ariel i ve noticed that the soil stack from the ensuite vents through the tiled roof but the main bathroom pipe stops about 2 feet above the joists insulation in the loft space with some sort of. Porch roof ventilation options. I was thinking of using a straight pvc pipe to create a horizontal run leading towards the roof and then somehow terminating it at the eaves. I understand this will be very bad for the wooden beams.

Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent. I have set up a 2m x 2m tent which i intend to flower in and up until today i was going to make another big hole in the side of the garage wall ie i have a 12 fan that i plan to use for extraction of hot air produced by 2 600w hps lights ive since thought to myself would i get away with venting straight up into the roof space above or would it. Different forms of high and low level ventilation are used as well apart from the soffit vents and ridge vents pictured. Roof ventilation this picture represents what is considered to be the best way to ventilate a roof space.

We ve also seen homeowners have to replace all their roof decking because it became rotted from the excess moisture. We have a bathroom with no external windows and an extractor fan that we just discovered vents straight upwards into the cold loft space. Fairly simple stuff fresh air in old stale air out. 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 be vented continuously from the eave to the ridge.

The pitch of the roof is important as flat roofs cannot take advantage of the stack chimney effect that a roof slope can provide.