Low Sloped Roof Ventilation

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

Low sloped roof ventilation.

An airspace is left above the ceiling insulation and below the under side of the roof decking and the roof is vented either around its perimeter with soffit vents a flat roof or the roof may be include intake venting at its lower edge through a soffit and outlet venting through a half ridge vent or similar outlet vent along the roof s uppermost edge a low sloped roof. Smartvent can be modified to provide intake ventilation for new roofs or re roofs through the fascia board for low slope roof with less than a 4 12 pitch. Hi all in new. This attic space was typically vented via static air vents.

The downside to turbine vents is that they don t provide much venting power on calm days. So that probably means you are going to use a modified bitumen roof or something like that for the 5 12 low slope flat roofs. November 19 2014 9 08pm 1. One of my goals this year is to learn about ventilation for my customers so we can make good recommendations for them.

On a windy day the vent s turbine mechanism spins which moves hot attic air up and out. Turbine vents are not low profile but in windy climates they provide more ventilation than other types of roof vents. The roof design included an interstial space of 1 5 to 2 meters between the ceiling and roof deck. I m a flat low slope roofer.

If you want a low slope roof without any spray foam or rigid foam there are only two approaches that will work as far as i know. The top of the roof meets the wall of the house and the 2 sides also meet walls. We raised a ridge vent by 2 inches from the roof surface. This clearance is more than sufficient to prevent any water from entering your house through the ridge vent.

If your low roof that ends at a wall high side is a pitched roof say 4 12. I don t know what the minimum slopes allowed for your type of metal roof materials are. Check the specs for the exact minimum. In climate zones 5 6 7 and 8 any air.

You need to create an unvented roof assembly. So it is essentially boxed in on 3 sides. You need to make sure that you have an air space of at least 6 inches between the top of your insulation layer and. For over generations multi residential flats buildings were constructed in north american with low slope roofs.

Ventilate at the gable ends and insulate the ceilings of the space if not vaulted. Last year i ran into several flat and low slope roofs with vents on the top of them in different scenarios 2 12 slope barrels and near dead level. To properly ventilate a low slope roof we ve created a special assembly method which allows the installation of ridge vent and eliminates associated roof leaks.