Installing Venting Through Cold Attic

Attic for example has an area of 1 200 sq.

Installing venting through cold attic.

The warm moist air inside the vent tends to condense on the colder walls. Start in the attic and drill a hole through the roof in the desired vent location. A 30 x 40 ft. First determine your attic area by multiplying the length by the width.

Adequate attic ventilation is important to reduce your utility bills and avoid damage to the roof and attic. The number of vents in your roof will depend on the size of your attic. In of vent opening per 150 sq. Then aim for about 1 sq.

If you vent through a soffit where attic vents are often located the moisture will get sucked back up into the attic or roof venting. If there s blown in insulation like ours rake back the fluffy stuff with a 3 or 4 ft long 1 x 6 or use a garden rake or hoe. You are then back to sticking the vent to the wall with the brackets and screws. Venting the soffits is often done by installing continuous strip vents between the soffit boards or by adding rectangular and round vents at regular spacing between the rafters the easier option for existing soffits.

The roof is vented by simple holes cut through the sheathing and protected with vent caps or by continuous ridge vents. Your roofer will build this frame just a little larger than size of the vent leaving 1 8 inch of extra room on each side. The building code lets you reduce that by half under some conditions but more roof ventilation is usually better. Having a vent in each side of the gable was the typical attic ventilation configuration in older houses but today it is considered woefully inadequate for an efficient house.

Install half of the required vent area in soffit vents. Soffit vents the narrow horizontal section on the underside of your roof eaves. If the attic is insulated with fiberglass batts just pull back any that are blocking the flow of air. Try to keep it close to the fan location.

The soffit vents are now installed but you still need to make sure there s no insulation blocking the new vents. Leave the drill bit sticking through the roof so you can find the hole. Attach the roof vent to the duct that is from the top of the roof. The attic is usually colder than the rest of the house during the winter and that can create a problem for a dryer vent.

Use rigid metal ducting aluminum or galvanized steel with lengthwise seams facing up and joints sealed with foil tape or duct mastic or rigid plastic pipe. There are different kinds of vents. You will then install the dryer vent through the hole that you have just made. The standard is one square foot of venting for every 150 square feet distributed evenly between the soffit and roof vents.