SIP’s in moderate climate… good value?
sacked
| Posted in Energy, Heating & Insulation on
Hello I am wondering about the usefulness of using SIP’s in a moderate climate, Davis Ca. avg # of days with highs above 100 15-20, below 35 15-20 as well, the cost for the SIP’s for a 4500′ two story house is 35,000 add to that the additional layout and upsized rim joists and it moves closer to 40k!! wouldn’t 2×6 or 2×8 exterior framing with full “blown on” urethane as well as 1″ ext stucco foam be nearly as effective as the SIP panels. The material w SIP’s is going to run 80k and local framers getting $15 per foot another 60k this seems way out of line the homeowner is looking at cost savings not to make an environmental statement. Any ideas on the values
Replies
Greetings sacked,
As a first time poster Welcome to Breaktime.
This post, in response to your question, will bump the thread through the 'recent discussion' listing again which will increase it's viewing.
Perhaps it will catch someone's attention that can help you with advice.
Cheers
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I want my money back!
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sacked,
there are several reasons to use SIP's aside from energy savings.. among them is a SIP is 200% stronger than a properly built stick built house.. Earthquake country that's a big deal..
another reason is a SIP is very quiet.. unlike stick built which is basically panels between studs which does an excellant job at transmitting sound SIP really make a statement about being quiet..
durability also enters here.. A SIP is going to be more durable than a stick built house, the only "weakness" is the OSB on the outside and they are getting better and better about making OSB able to withstand direct exposure to weather.. That "weakness" is about what a typical stick built house has but a stick built house once the outside sheating fails the house comes falling down.. a SIP will remain. the foam will be like the coffee cup there for centuries. Fire resistance is also much greater with SIP's than with stick built..
And don't forget energy saved will be .. a bigger and bigger deal in the future than it is now..
Having said that those numbers seem dramatically out of line.. I bought my panels for around $3.00 a sq.ft for walls and about 4 a sq.ft for roof.. that's a 6 inch panel on the walls and a 12 inch panel on the roof.. Labor on a SIP house should be much cheaper than a stick built house.. the panels tip up in place and the walls done..
However since I've done both SIP's and ICF's I would use ICF's in the walls and SIP's on the roof for the best combination available.. ICF's right now are either in line or at worst a 2% premium over Stick built. SIP do command a premium simply because of lack of experiance by most contractors..
Less than 2% of all housing built is built with SIP's or ICF's that means 98% of all contractors have no experiance or know that the market will supoort a premium so why not make it..