Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.
Metal roof ventilation requirements.
Hot air beneath the metal needs an escape route near the top of the roof and intake vents at the bottom of the roof.
According to their requirements you should have 1 square foot of attic ventilation per 300 sq ft of attic floor space.
A metal roof typically does not increase nor decrease the need for ventilation.
To protect their investment it is key that your customers ensure the proper ventilation system is installed.
Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.
If your roof is 1200 sq ft soffit floor space you will need 4 sq feet of roof ventilation.
Ventilation helps wto avoid the inefficient and potentially unhealthy accumulation of heat and moisture in your attic and living space.
Roof ventilation depends on the simple scientific fact that hot air rises.
The breathing of a metal roof if any is determined by the exact product chosen and its method of installation.
Metal roofing neither increases nor decreases the need for ventilation.
We do need to mention though one very rare scenario we have seen just a couple of times over our 35 years.
Ventilation that meets code requirements is adequate for any type of roofing material including metal.
You can also contact your local municipality to check on building code in your area.
Roof vents choose one of the following products to meet the recommended exhaust nfva of 528 square inches.
Mesh roll ridge vent in black nail gun version when installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic.
To ensure a balanced system 50 percent of the ventilation should be at the eave and 50 percent at the upper portion of the roof.
Ventsure 4 foot strip heat moisture ridge vent 27 lineal feet required.
It comes on an easy to install flexible mesh.
Cobra exhaust vent 10 5 in.
Most building codes require a ratio of 1 150 ventilation space to attic floor space.
Selecting metal roof and wall panels is a strategic investment for the life of a building.
The united states department for housing and development hud requirements for proper ventilation call for a ratio of 1 300 or 1 square foot of ventilation for every 300 square feet of attic.
