Vinyl Soffit Span... What Backing OC?

bobaganoosh

Hi everyone. Im curious what others fasten their soffit backing at. Im installing soffit under a deck (about 7 feet span), and I am wondering what common practice is for installation of backing. Currently I am running my plywood rainscreen strips at about 30" OC for 8" wide soffit panels (D4 soffit).

Common practice I have found is to not span your soffits more than 3 feet without backing, therefore 30" OC should be acceptable.

I already know that the Vinyl Siding Institute reccomends not spanning your soffits more than 16" without backing, however Im curious as to what industry standards are in other places.

Im in Vancouver BC.

Your help is greatly appreciated!

MALCO.New.York

Eggplant Dip.......What a name!!!!

__________________
Something to One may be Nothing to another!

Ultimate Wisdom---------
http://www.youtube.com/watch?v=OW-cnizLDEE

bobaganoosh

ever seen "wedding crashers"?

Cole

I never go over 16".

__________________
Tulsa's Leader in Outdoor Living Construction | Facebook | Tulsa Pergola Builder | Tulsa Outdoor Kitchens

bobaganoosh

are you using 8" wide panels (D4) or 16" wide panels (4 panel)??

Jason Whipple

So how much money do you feel you're saving by doing less than what the manufacturer suggests? Is their a reason you don't follow directions?

__________________
Jason E Whipple, General Manager
Historic House Restoration, Cincinnati, Ohio
Facebook | Twitter

Patrick

16 or less and if its more than 3 feet, it better be beaded

__________________
Originally Posted by Celtic
Like I said...I'm sure you are very good at what you do ~ whatever that is and where ever it happens.

bobaganoosh

Who installs the backing for the soffits... the siding contractor or the framer?

Our standards in Vancouver has been the framer for most parts although the last few years they get "too busy" and we are forced to "throw it in".

Cole

Depends on crew and builder.

__________________
Tulsa's Leader in Outdoor Living Construction | Facebook | Tulsa Pergola Builder | Tulsa Outdoor Kitchens

bobaganoosh

I have just found literature for manufacturers reccomendations is not to span 8" soffit more than 48".

easy sider

The vinyl soffit spans between nailers depend on thickness of the material and tinsel strength. Economy and most triple 4 universal soffit should be nailed at 12`` oc while d-5 can span 24``. Certainteed Iron Max can span 36``. 3/8 cdx is not considered a nailer. No vinyl soffit can span 4 ft.

Alcoa Aluminum soffit can span 4 ft. Steel soffit can span 5 ft.

Tom Struble

4'? i dont know im a 16''oc beliver and if the framers dont add blocking i do