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#1 |
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Registered User
Trade: General Residential Home Builder
Join Date: Dec 2005
Posts: 10
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Foam Board Vs. OSB
Can anyone clarify for me if there is some actual benefit to using a foam board vs. OSB other than cost savings (which are minimal anyway)? I have only previously built in California and the homes have been 100% shearwall structural 1 OSB and stucco exteriors. I am now in Georgia and building homes that will have brick exteriors. It now dawns on me that in Cali we were using much more shearwall for seismic reasons, hence the 100% osb. I have never even seen this foam board before, but all builders in this area use minimal required shearwall corners and fill in the rest with foam board, wrap the whole house with plastic house wrap and brick them up. I think it seems like a cheap way to go and have specified 100% OSB with house wrap for my homes, but now I am afraid there may actually be some benefit to the foam??
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#2 |
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DGR,IABD
Trade: Electrical; Commercial and Residential Service
Join Date: Mar 2005
Location: Central PA
Posts: 9,680
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Re: Foam Board Vs. OSB
A couple point on the R-value, and the slight cost savings.
There were a few homes in my area that were burgularized that were done with Celotex and vinyl siding. The crooks yanked off a few pieces of vinyl siding, punched through the celotex, and punched through the drywall. Apparently it was easier than breaking into the security screen door and steel entry door.
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#3 |
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Pro
Trade: Carpenter
Join Date: May 2004
Posts: 6,484
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Re: Foam Board Vs. OSB
I guess the cops only clue was the guy's 'silhouette'!!
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http://www.tr-built.com |
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#4 | |
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Pro
Trade: Home Improvement
Join Date: Oct 2005
Location: Wisconsin
Posts: 302
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Re: Foam Board Vs. OSBQuote:
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#5 |
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J.O.A.T.M.O.A.C.
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Re: Foam Board Vs. OSB
better insulation comes to mind. I have been told that osb or plyboard isnt to high on the R factor list.
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#6 | |
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Pro
Trade: Remodeler
Join Date: Sep 2005
Posts: 2,168
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Re: Foam Board Vs. OSBQuote:
This reminds me of two stories: A house was burglarized and the alarm didn't go off because they did this same thing and second an x-girlfriend told me about the townhouse development she lived in once where she was looking out the window and a rat went right through the wall. Now a rat can chew through OSB, but at least it would give a little resistance. |
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#7 | |
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Registered User
Trade: Siding Windows Metal stud sheet rock grid ceilings
Join Date: Nov 2010
Posts: 6
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Re: Foam Board Vs. OSBQuote:
This is the problem with new construction builders. VINYL SIDING is NOT a made to nail over studs and call it a day. Im in the residential remodeling field where there is a house FINISHED and sealed, studs shear wall (weather it be insulation osb or 3/4 plywood) then your exterior siding(wood siding, t1-11, esbestos, shake, whatever,lol) then we come along and install 3/8- 3/4 insulation on the walls then our Vinyl. Siding needs a strong base to sit on not that cheesy black board or foam over studs. lol Sorry I said nothing about brick, lol, I dont do brick but yes the insulation provides r-value and moisture barrier. Although plywood then tyvek then brick ties makes better sense. the gap between the brick and the tyvek(dead air space pocket) creates an insulation. |
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#8 |
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Framer-billy
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Re: Foam Board Vs. OSB
We sheath our walls before we stand them, and OSB is a lot faster to build with.
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#9 |
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Pro
Trade: siding
Join Date: Mar 2007
Location: west milford n.j.
Posts: 8,875
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Re: Foam Board Vs. OSB
actually it creats a rainscreen
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Tom |
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#10 |
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Registered User
Trade: residential contractor
Join Date: May 2010
Location: Iowa
Posts: 16
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Re: Foam Board Vs. OSB
The foam also works as a thermal break, so heat or the cold doesn't "conduct" nearly as much.
md |
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#11 |
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Sean
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Re: Foam Board Vs. OSB
MD nails the only reason to use foam besides increasing the RValue of the wall structure - I still sheathe with OSB, Tyvek & then foam over that
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#12 |
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Motorboatin' son of a ...
Trade: General Contractor
Join Date: Feb 2008
Location: Orange County, CA
Posts: 1,069
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Re: Foam Board Vs. OSB
Here in CA I only used OSB for sheer panel where it's called for on the plans. Yes, it's specified by the engineer mostly for earthquakes. I don't install it just for ****s & giggles. It not usually the entire house. There may be an entire wall or portions of various walls, but not the entire house. If a portion of a wall is sheer, but not the rest, we only install the sheer where required and something cheaper where it's not required whether it's foam board or just strips of wood or plywood. Our customers get the option to save money wherever they can. I they want to OSB the entire house, we can do it if they want to pay for it.
Last edited by BKFranks; 11-05-2010 at 05:44 PM. |
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#13 |
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The great cornholio
Trade: Framing/ICF
Join Date: Jan 2010
Location: Toronto
Posts: 2,760
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Re: Foam Board Vs. OSB
ive seen them do both, this house the framers invited me into do it that way
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#14 |
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LRG WoodCrafting
Trade: Master Sawdust Producer
Join Date: May 2005
Location: Windsor Locks, Connecticut
Posts: 13,218
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Re: Foam Board Vs. OSB
This thread is almost 5 years old
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Sawdust Follows Me Everywhere http://lrgwood.com Custom Cabinets in Hartford County Connecticut |
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| The Following User Says Thank You to Leo G For This Useful Post: | Tom Struble (11-06-2010) |
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#15 | |
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Pro
Trade: Framing
Join Date: Jan 2009
Location: Utica,NY
Posts: 2,063
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Re: Foam Board Vs. OSBQuote:
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| The Following User Says Thank You to Framer53 For This Useful Post: | Tom Struble (11-06-2010) |
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#16 |
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Pro
Trade: Framing
Join Date: Jan 2009
Location: Utica,NY
Posts: 2,063
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Re: Foam Board Vs. OSB
thanks Leo. At least I responded to the person that posted today!![
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#17 |
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Pro
Trade: siding
Join Date: Mar 2007
Location: west milford n.j.
Posts: 8,875
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Re: Foam Board Vs. OSB
save your typin finger 53 judging by the few post i read he already knows everything
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Tom |
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