How Many Roof Tile Vents Do I Need

Once you know the square meterage of your roof the next stage is to calculate how many tiles you need.

How many roof tile vents do i need. Their advice will be specific to your property. If the ventilation is still inadequate ie you still have condensation in there consider 2 tile vents in each elevation approx half way up. Thus if your attic is 450 square feet you need roof vents equaling 3 square feet. Near ridge of the roof.

I can t comment on new current construction since we don t get involved in that but we work all the time on 1910 1920 s vintage slate and tile roofs and i have yet to see any of them with any sort of roof vent system other than occasionally a gable vent. As a general rule your roof needs 1 square foot of vent area for every 150 square feet of attic space. Based on your 1100 sq. On the other hand if you have bad condensation a semi detatched could need 2 3 per elevation or 2 3 front and back as a.

New code we need one 2 vent near the point of maximum flow main stack and we can use air admittance valves everywhere else. And this guideline you ll need a minimum of. How many roof tiles do i need. 3 97 x 12 6 x 2 100 04m total roof area when you know this you can work out all the materials needed to complete your project.

This is a bit like how long is a piece of string. If it s easier put a9 x 6 air brick in each gable wall these could be approx 500mm above the top of your ceiling joists. If you have ventilation by other means like soffit or eaves vents no undersarking or no condensation problems the answer may be none. Roofing superstore s full range of roof vents can be found here.

A competent roofer will advise you how to optimise the ventilation in your roof without adding too much if you install too many roof vents or the wrong type of ventilation this can make your roof more vulnerable to leaking. How to determine how many vents you need the rule of thumb used to determine the number of roof vents to install is one for every 300 square feet of attic area if your attic has a vapour barrier and one for every 150 square feet of attic area if the attic does not have a vapour barrier. Codes change every year and we don t put the air admittance valves studor vents on until the house has been water tested and all glue fumes are out of the system. They should be divided equally between inlet and outlet vents and they can be used in any combination that will work with your roof s design.