Low Sloped Roof Ventilation

The roof design included an interstial space of 1 5 to 2 meters between the ceiling and roof deck.

Low sloped roof ventilation.

I m a flat low slope roofer. 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. You need to create an unvented roof assembly. So it is essentially boxed in on 3 sides.

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. This clearance is more than sufficient to prevent any water from entering your house through the ridge vent. I don t know what the minimum slopes allowed for your type of metal roof materials are. One of my goals this year is to learn about ventilation for my customers so we can make good recommendations for them.

About 12 x 18. November 19 2014 9 08pm 1. Check the specs for the exact minimum. 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.

On a windy day the vent s turbine mechanism spins which moves hot attic air up and out. Look at our fasciavent which has been designed more specifically for metal roofs and provides the intake ventilation for flat to 16 12 pitches. Where wood shingles or shakes are used a minimum 1 4 inch 6 mm vented air space separates the shingles or shakes and the roofing underlayment above the structural sheathing. For over generations multi residential flats buildings were constructed in north american with low slope roofs.

The downside to turbine vents is that they don t provide much venting power on calm days. Hi all in new. 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. 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.

If your low roof that ends at a wall high side is a pitched roof say 4 12. Turbine vents are not low profile but in windy climates they provide more ventilation than other types of roof vents. We raised a ridge vent by 2 inches from the roof surface. In climate zones 5 6 7 and 8 any air.

Ventilate at the gable ends and insulate the ceilings of the space if not vaulted. You need to make sure that you have an air space of at least 6 inches between the top of your insulation layer and. I m trying to vent a 1 12 roof that has not been vented.