11:07AM | 10/01/04
Member Since: 07/15/04
14 lifetime posts
Many cantilevered joist details that I see show continuous screened soffit vent. Is this really necessary? The only thing that I can think of is that a floor is typically not given a vapor retarder (not a problem over a vented crawlspace). I can find nothing in IRC specific to this situation.


05:38AM | 10/02/04
Member Since: 01/28/03
694 lifetime posts
Venting soffits under a cantilever may or may not be done because the cantilevered portion of the overhang needs to be fireblocked and sealed from the crawl or basement area under the IRC.

This means that soffits under a cantilever do not vent the basement or crawlspace at all because. 2x10 fireblocks must be placed over the basement wall between joists at the point where the cantilvered joists exit the basement.

And since the IRC requires that insulation equal in thickness to that used for your attic be used under any exposed cantilever, there is no requirement to have open soffits.

So don't use them.



Post a reply as Anonymous

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


type the code from the image


Post_new_button or Login_button

A simple banquette piled with pillows and lit from above with a wall sconce is a tempting spot to curl up with a favorite ... Built on a rocky island in the Drina River, near the town of Bajina Basta, Serbia, this wooden house was cobbled together ... Large steel-framed windows flood the interior of this remodeled Michigan barn with daylight. The owners hired Northworks A... Edging formed with upside-down wine bottles is a refreshing change. Cleverly and artistically involving recycled materials... A Washington State couple called on BC&J Architects to transform their 400-square-foot boathouse into a hub for family bea... Similar to the elevated utensil concept, hanging your pots and pans from a ceiling-mounted rack keeps them nearby and easy... For windows, doors, and mirrors that could use a little definition, the Naples Etched Glass Border adds a decorative flora... The thyme growing between these stepping stones adds a heady fragrance to strolls along this lush, low-maintenance garden ... Decoupage is an easy way to add any paper design to your switch plate, whether it is wallpaper, scrapbook paper, book page... 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... Reluctant to throw away any of those unidentified keys in your junk drawer? Hang them from a few chains attached to a simp... A stripped-down model, sans screened porch, starts out at $79,000. Add the porch, a heated floor for the bath, and all the... Salvaged boards in varying widths and colors make up the dramatic accent wall in this attic space. The high-gloss white of... This garden shed has been decked out to the nines. Designer Orla Kiely created the intimate home for a flower trade show, ...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon