Roof Replacement and

Roof Repair Specialist

(703) 475-2446
READ OUR
CUSTOMER REVIEWS

Roofer911 on Facebook
Roofer911 on Google+
Roofer911 on Yelp
Roofer911 at Better Business Bureau
Roofer911 at Angie's List
Roofer911 at Angie's List
Request Estimate
Immediate Response!
Full Name:
Address:
City:
State:
Zip:
Phone:
Email:
Type of Service:
Customer Type:
Project Details:




We Proudly Accept
Testimonial
What People Say About Us
Roof Repair, Infrared
Fast quote and excellent followup.
David Caldwellbusiness
Woodbridge, VA
March 17, 2013
Roofer911 - Northern VA
0.3

Best of the Best National Award


Blog Categories
Submit Your Blog

Attic

Black Mold

Cedar

Clay Tiles

Commercial Roofing

Flashing

Green Roof

Gutters

Ice Dam

Infrared

Insulation

Insurance

Metal Roofing

OSHA

Roof Cleaning

Roof Inspection

Roof Repair

Roof Replacement

Roof Ventilation

Roofers

Roofing Companies

Roofing Supplies

Siding

Skylights

Slate

Solar

Steel

Tile


How Much Attic Ventilation Prevents Ice Dams?

July 31, 2011 by - 0 Comments

Did you like this?

How much attic ventilation needed The amount of attic ventilation you need to have to prevent ice dams from building up along the edges of your roof is a science. There is a balance between having so much air flow in the upper regions of the house that it affects the climate in the rest of the house and having so little you end up with roof leaks and water damage.

The Manufactured Housing Research Alliance and the U.S. Federal Housing Administration (FHA) have done the research that shows how much ventilation you should have. They have come up with a basic formula you can use to make your own determination.

Start by getting the square footage of your attic space. Do this by multiplying the length of the attic by its width. Now divide this number by 300. The FHA says an attic needs 1 square foot of ventilation for every 300 square feet of attic floor space. So, if your attic is 1200 square feet, you will require 4 square feet of ventilation.

The next step is to determine the minimum square inches needed for the intake and exhaust vents. You do this by multiplying your last number by 144. In the example, it would be 4 x 144 = 576 inches. Keep in mind your exhaust area should not be larger than your intake area.

Now you can go ahead and find a combination of roof vents that total this many square inches. Your roofer can look at your attic and provide guidance for the vent types of attic ventilation for your home. This will keep the ice off the roof in the winter and keep the attic cool and dry in the summer.





Browse other blogs by keywords:

Roof Repair     Ice Dam     Roof Inspection     Infrared     



Comments

0 Responses to "How Much Attic Ventilation Prevents Ice Dams?"


Speak Your Mind!

Tell us what you're thinking...
and oh, if you want a pic to show with your comment, go get a gravatar!

Name:*
Email:*
(We will not share or publish your email address)
Website:  
Comments:*
Security Code:*  (Enter the code in the image below)
Request Estimate
Immediate Response!
Full Name:
Address:
City:
State:
Zip:
Phone:
Email:
Type of Service:
Customer Type:
Project Details:




We Proudly Accept
Testimonial
What People Say About Us
Roof Repair
Quick response by staff. Courteous and very easy to communicate with. Were able to get out, survey my roof, give me estimate, and fix roof without me having to be home and all communication was done via cell phone or email. Awesome work!
Marc Bialekbusiness
Arlington, VA
December 30, 2010
Roofer911 - Northern VA
0.3


Blog Categories
Submit Your Blog

Attic

Black Mold

Cedar

Clay Tiles

Commercial Roofing

Flashing

Green Roof

Gutters

Ice Dam

Infrared

Insulation

Insurance

Metal Roofing

OSHA

Roof Cleaning

Roof Inspection

Roof Repair

Roof Replacement

Roof Ventilation

Roofers

Roofing Companies

Roofing Supplies

Siding

Skylights

Slate

Solar

Steel

Tile



FacebookTwitterLinkedInYouTube
Copyright, © 2018 Roofer911.com. All Rights Reserved