One of my goals this year is to learn about ventilation for my customers so we can make good recommendations for them.
Low sloped roof ventilation.
About 12 x 18.
This clearance is more than sufficient to prevent any water from entering your house through the ridge vent.
Turbine vents are not low profile but in windy climates they provide more ventilation than other types of roof vents.
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.
For over generations multi residential flats buildings were constructed in north american with low slope roofs.
November 19 2014 9 08pm 1.
Check the specs for the exact minimum.
Hi all in new.
This attic space was typically vented via static air vents.
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.
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.
You need to make sure that you have an air space of at least 6 inches between the top of your insulation layer and.
We raised a ridge vent by 2 inches from the roof surface.
Ventilate at the gable ends and insulate the ceilings of the space if not vaulted.
The downside to turbine vents is that they don t provide much venting power on calm days.
Look at our fasciavent which has been designed more specifically for metal roofs and provides the intake ventilation for flat to 16 12 pitches.
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.
I don t know what the minimum slopes allowed for your type of metal roof materials are.
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.
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.
So it is essentially boxed in on 3 sides.
The top of the roof meets the wall of the house and the 2 sides also meet walls.
In climate zones 5 6 7 and 8 any air.
I m a flat low slope roofer.
The roof design included an interstial space of 1 5 to 2 meters between the ceiling and roof deck.
I m trying to vent a 1 12 roof that has not been vented.
You need to create an unvented roof assembly.
