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#24924 - 12/22/10 03:00 PM Re: REMOTE system
TIMBEAL Offline
Member

Registered: 12/10/07
Posts: 1875
Loc: Maine
The obvious big cost is the sheet foam, in it's different forms.

I spray foam the cracks of the last layer and apply a stick of strapping right at that moment, so spray foam is another cost.

Next would be the screws, I am using panel screws through the strapping and next into the timber and the planks(that is what I am using), I am guessing if you studded a light wall you could screw into the studs if you can find them?

Window bucket material, and the strapping is next on my list. One item the link shows them using is Ice and Water over all the exterior of the building, I have omitted this and don't factor it in as a cost.

I can see the use of it around windows after the buckets are set and before the windows go in and draining it to the outside by some method is also nice. This is a tight building and the windows will sweat. How about one of those air exchange systems, as part of the cost?

I am using clapboarding as the siding this allows the strapping to run vertically and on 2'centers. If shingles were to be used I think I would board on the 2' straps then apply the shingles, but that is a lot of extra work/cost.

Just some thoughts and input. Is that what you were looking for, Kevin? I think it is a nice system.

I also cut in the window opening after everything is attached on the exterior, for the most part. I adjust any of the strapping if needed. I save the extra foam from the opening and work it into the last wall on the house, as a first layer, resawing on the table saw if needed. So little or no waste, there is always some, if you were creative there would be 0 waste, for those greenies.

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#24927 - 12/22/10 05:17 PM Re: REMOTE system [Re: TIMBEAL]
Kevin Rose Offline
Member

Registered: 11/08/09
Posts: 80
Loc: Tunbridge, Vermont
So, there's the cost of the 2x4 curtain wall, plus the fiberglass in the stud cavities (if one chooses), the sheathing, the membrane, the rigid foam ($3,50 / sq ft for 6") the furring, . . .

Just curious, how does that compare with a sq ft cost for an installed SIP?

I like it 'cause I can get my hands on it and don't have to contract it out. Plus, I don't need cranes, specialty tools, and a crew of workers to get it on.
_________________________
~Kevin Rose
Northern Vermont

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#24929 - 12/22/10 05:51 PM Re: REMOTE system
bmike Offline
Member

Registered: 01/09/08
Posts: 918
Loc: Burlington, VT
I'd use wet cellulose in the wall cavity instead of fiberglass. Go 2x6 or 2x8 with a thin layer of foam.

I have a client who did 2x10 with 1" of urethane sprayed in and then set cellulose with a high R on the outside. He has something like R40 in his walls.
_________________________
Mike Beganyi Design and Consulting, LLC.
www.mikebeganyi.com

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#24932 - 12/22/10 07:39 PM Re: REMOTE system
TIMBEAL Offline
Member

Registered: 12/10/07
Posts: 1875
Loc: Maine
Not to debate the topic but to give options....

3 layers of 2" urethane foam at R-7/inch get you R-42. No additional stud wall or fiberglass. Where do you run your wires? Perhaps conduit on the outside of the foam within the strapping layer. A baseboard box chase on the inside? Don't forget the interior walls which allow for conventional wiring. If you use a conventional framed floor system you get to use that for plumbing and wiring as well.

I am using 5/4" strapping, 3", 4", and 8"-10" for the corners and window buckets.

One of the worst parts for me is running the pricing numbers, so please excuse me for not going there. Finding a little difference at one store while something else is priced a little higher and so forth.

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#24935 - 12/23/10 10:40 AM Re: REMOTE system
Reid Harding Offline
Member

Registered: 06/15/07
Posts: 4
The wiring will go in the stud walls. If you don't place insulation in the stud walls, then plumbling can go there too as the stud cavity will be at room tempurature. You could replace the 2x stud wall with timber studs in 4x4 or 4x5 dimensions on the exterior walls and insert drywall in slots close to the inside surface the studs to provide a reveal. Then all your structure is timber and you have a cavity for wiring.

Reid

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#24937 - 12/23/10 01:26 PM Re: REMOTE system [Re: Kevin Rose]
frwinks Offline
Member

Registered: 06/14/07
Posts: 195
Loc: The Hills, ON
Originally Posted By: Kevin Rose
Just curious, how does that compare with a sq ft cost for an installed SIP?

that all depends on how you shop grin with SIPS, you're pretty much SOL, you've got a handfull of companies pressing them out as fast as they can get the forests shredded to make OSB and setting the prices as high as they want. If you want SIPS... you pay the quoted price and might get lucky to get a 5%-10% discount if you're nice and buy $80K worth of them grin
If you stick to the more mainstream materials, the price is what YOU want to pay. Buy when stuff goes on sale, not when you need it, look for reclaimed insualtion, buy direct, second hand, etc.. it's all up to how crafty you get with it grin
_________________________
there's a thin line between hobby and mental illness

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#24938 - 12/23/10 02:10 PM Re: REMOTE system [Re: frwinks]
Kevin Rose Offline
Member

Registered: 11/08/09
Posts: 80
Loc: Tunbridge, Vermont
thanks for the feedback. At the moment it's all just food for thought and consideration for the design of a small home that won't be built for another few years. I've gotta finish the next barn first. (Ah, the simplicity of unheated, uninsulated buildings!)
_________________________
~Kevin Rose
Northern Vermont

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#25232 - 01/18/11 11:33 AM Re: REMOTE system
Addicted Offline
Member

Registered: 11/26/10
Posts: 7
Loc: MI
How does this system perform and cost compared to the larsen truss system or the double wall system?
http://www.greenhomebuilding.com/articles/larsentruss.htm
Has anyone used either of these?
Rusty

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#25244 - 01/20/11 10:09 AM Re: REMOTE system [Re: Addicted]
frwinks Offline
Member

Registered: 06/14/07
Posts: 195
Loc: The Hills, ON
Originally Posted By: Addicted
How does this system perform and cost compared to the larsen truss system or the double wall system?
http://www.greenhomebuilding.com/articles/larsentruss.htm
Has anyone used either of these?
Rusty


the double wall Larsen/Riversong truss systems is a solid performer as well.
After hanging around Mr. Riversong on another forum, I must admit a much "greener" option to boot.
After living/working in our house for a few months now, I can tell that the sound transmission through the foam is very high...too high for a house IMO. Originally I was going to leave the wall cavities empty, now I'm planning on blowing dry pack cellulose (damp if I can find the equipment to rent) in them in order to reduce the noise transmission and as a bonus, bump up the insulation value to about R46.
_________________________
there's a thin line between hobby and mental illness

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#25282 - 01/23/11 08:22 AM Re: REMOTE system [Re: frwinks]
Addicted Offline
Member

Registered: 11/26/10
Posts: 7
Loc: MI
Do you think the sound transmission is more than what you'd have with sips?
Could the sound coming through the wall be enhanced by the wall cavity? Kind of a sound enhanced chamber?
If you infill the walls, how is that going to change the performance of your vapor barrier?
What are the benefits of damp v.s. Dry blown cellulose?
Are you happy with the current insulating performance of the wall now?
Sorry for the rapid fire questions
Thanks for all the help

Rusty

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