How Do I Ventilate My Attic

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How do i ventilate my attic. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. Exhaust vents which are located near or on the ridge line of the roof and allow air to leave the attic. If necessary use baffles to keep the insulation back from it. Calculate net free vent space building codes typically require 1 square foot of venting space for every 150 square feet of attic space.

Look at your eaves and roof. You can also contact your local municipality to check on building code in your area. A hot ceiling tells you that the attic is acting like a solar oven. Here are four signs of an unventilated or under ventilated attic.

This creates a natural air flow by drawing in the air from outside pushing it up and out through the vent at the top of the house. The first thing to do is be certain your builder provided adequate soffit ventilation for your house. This fan draws the air in your house up into the attic and evacuates it through the roof vents. A portable air conditioner is the easiest solution for cooling your attic.

Portable air conditioners do need to be vented to pump the hot air outside. This is called passive ventilation. The most common way to add ventilation to an attic is by installing air intakes in the soffits and putting an outlet at the gable of the house. It s a standalone unit that s about two feet tall and 18 inches wide and has wheels for mobility.

The venting space should be equally divided between intake. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. Soffit vents and the grills you see under the eaves all around the structure. If it is still being built i would install a whole house fan.

If you don t see any attic vents on the roof or in the eaves you need to add some. Most come with a window kit for this purpose that attaches to a hose on the back of the unit. Make sure your attic insulation doesn t block the intake vents. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Static roof line vents are effective for ventilation but generally aren t recommended due to issues with leaks. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Touch your ceiling on a warm sunny day. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Most building codes require a ratio of 1 150 ventilation space to attic floor space.