COMMUNITY FORUM

Cody

03:25PM | 05/03/03
Member Since: 05/02/03
2 lifetime posts
Bvroofing
I am installing a galvanized steel roof over existing asphalt shingles which will first be strapped with 1X4's. What is the proper way to install attic vents so they don't leak, etc. What are the best vents to use? There are no pre-existing vents on this 1940's home (yikes!). My house is 1000 sf with a pyramid style roof.

Brian Wood

11:58PM | 05/04/03
Cody, first take off the shingles. The intense heat under the metal will dry & crack them, they will come loose and you'll have an unstable roof.

To avoid leaking vents, just install a full-length ridge vent, or as much as you can. Zero leaks.

Another tip to help lower your cooling bills, coat the metal white with a good quality elastomeric product.
www.supertherm.net & www.icc-astec.com come to mind.

Good luck with your new roof.

Brian.

Cody

05:52AM | 05/06/03
Member Since: 05/02/03
2 lifetime posts
Hi Brian. Thx for your advice. Our roof is an unconventional pyramid design, meaning we will have at least 4 ridge caps that all meet in the centre of the roof. Would you still recommend ridge cap vents and if so, would you vent all four? Also, we've gotten lots of yeas and nays regarding removing the shingles first. We were left to understand as long as the roof was strapped that the heat problem would take care of itself. Thx again. Cody

Todd Miller

05:14PM | 05/14/03
Member Since: 11/13/99
7 lifetime posts
I have worked with residential metal roofing on thousands of installations since 1981. Probably 80% of those jobs have been over existing shingles. Never, not even once, have I encountered a job where going over the old shingles made the roof unstable.

Next, most types of metal roofing are designed for installation over solid decking or existing shingles (with new underlayment). If you install strapping first, make sure that the roof panels you're installing are appropriate for that type of application. Don't mess around -- contact the roofing manufacturer and inquire with them.

Next, with a pyramid style roof, you will need to use standard square static vents. Again, inquire with your roofing manufacturer for proper flashing methods.

The vents you're installing are there to allow unwanted heat and excessive moisture out of the attic. Your metal roof is not "putting" these things in there though. The need for ventilation is the same no mater what type of roof you're installing. As we do things to make homes tighter, we must increase ventilation.

Finally, these vents are for "exhaust" ... to function properly, you also need "intake" -- normally soffit vents.

Contact me if you have further questions.

Click_to_reply_button
Inspiration_banner

INSPIRATION GALLERY



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.

Reply_choose_button

captcha
type the code from the image

Anonymous

Post_new_button or Login_button
Register

Your home’s exterior is the first—and last—impression to anyone who drops by. Make it memorable with a spotlessly clean lo... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Follow_banner_a
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon
 
webapp1