Low Pitch Roof Ventilation

I m trying to vent a 1 12 roof that has not been vented.

Low pitch roof ventilation.

There is a clear answer to your question. The roof design included an interstial space of 1 5 to 2 meters between the ceiling and roof deck. A low slope roof decreases the amount of ventilation that can be achieved through stack action and the presence of large quantities of insulation often restricts the ventilation space between the insulation and the roof sheathing. For over generations multi residential flats buildings were constructed in north american with low slope roofs.

November 19 2014 9 08pm 1. Basically you need lots of height above the top of your insulation layer plus a few vented doghouses cupolas. Secondly you really have two different roof types working here low slope or flat roofs and pitched roofs. The universal dormer vent is a low profile off ridge roof vent that is designed for a pitched roof of 3 12 slope or greater.

This cap features both a back draft damper and bird screen preventing outside air from entering the home and birds and small pests from entering duct work. So it is essentially boxed in on 3 sides. Low slope roofs are difficult to ventilate but there are a few techniques that work. Choose one of the following products to meet the recommended exhaust nfva of 528 square inches.

The universal dormer vent can be used as an air intake vent or as an air exhaust vent depending on where you install it on the roof. It is compatible with 3 or 4 ductwork and includes a 3 to 4 adapter for convenience. About 12 x 18. I have seen ventilated flat roofs but they are usually used in conjunction with attic spaces and you mentioned finished vaulted ceilings in your post.

The universal design looks great on a shingle roof. The top of the roof meets the wall of the house and the 2 sides also meet walls. The rvk1a steel roof cap kit is an the rvk1a steel roof cap kit is an easy to install vent for ventilation fans bath rec room home gym etc. Hip and ridge shingles starter shingles low slope products ice and water barrier synthetic underlayment intake ventilation exhaust ventilation titanium and rhinoroof.

The sketch at left shows a method for providing effective ventilation beneath a flat or low slope building roof using 2x4 strapping to assure that there is an airspace between the insulation and the roof deck underside.