JCook5003
Registered Users
Posts:5
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| 09/04/2008 7:13 AM |
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Hey Guys-
I want to build a passive solar home that will be heavily bermed on three sides with large windows facing south.....
The home will be built with ICF's, Slab on grade, and I was hopeful to use an ICF roof system to create a single plane low pitch roof.....
But my question is with a slab foundation, icf walls and a relativley flat ICF roof where do I run my heating and cooling ducts? I will run PEX plumbing with every line being a home run through the walls but cant figure where to put the heating ducts?
You guys have any suggestions or advice?
Thanks
Josh |
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woulfcc
Registered Users
Posts:185
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| 09/04/2008 7:56 AM |
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We have put it in the slab in the past.
A slab that is 6" to 8" that is frost protected and heated will hold your heat in all night.
Look in to legalet see what they can do for your heating needs.
Good luck. |
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Changing how the world BUILDS!
One build at a time.
Woulf c.c. |
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Alton
Registered Users
Posts:314
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| 09/04/2008 12:17 PM |
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| Another approach is to hang the ductwork from the roof and then hide it with a suspended ceiling. This means the walls will have to be a little taller. |
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Alton C. Keown
Residential Designer and Construction Technology Consultant
Auburn, Alabama
334 329-0957 AT&T Cellular |
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JCook5003
Registered Users
Posts:5
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| 09/04/2008 2:04 PM |
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| Another problem I am having is how to install ceiling fans and ceiling mounted lights? Any Suggestions? |
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Alton
Registered Users
Posts:314
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| 09/04/2008 3:13 PM |
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Are you having a problem because you are trying to mount the ceiling fans and lights to a sloping concrete roof (ceiling)? If so, then one way would be to use Tapcon screws. If you do not want the fixture mounted to match the slope of the ceiling, then use a wood base to make the mount level. (By the way, the concrete has to be pre-drilled before installing Tapcon screws.) |
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Alton C. Keown
Residential Designer and Construction Technology Consultant
Auburn, Alabama
334 329-0957 AT&T Cellular |
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saigafan
Registered Users
Posts:12
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| 09/04/2008 7:44 PM |
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what is the cost of the icf roof vs the traditional woodframe roof with the iceyene spray?
This is something I am interested in too, but amideck roofs are 20 dollars a square foot (what someone on this form told me).
Icf roof = no worries about hurricanes :) but I need to be able to afford it, hehehe.
I am going to watch this one for the advise. sorry to hijack this thread :(
Btw I read that amideck has built in AC ducks. |
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woulfcc
Registered Users
Posts:185
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| 09/04/2008 11:51 PM |
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Hambro or speedfloor was about $11.00 to $12.00 Sq. Ft. last I seen. If you make your roof from this with a sandwich of insulation on the top and bottom for the concrete.
If you wish you may run all your duct work in it and you would get what you are looking for. |
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Changing how the world BUILDS!
One build at a time.
Woulf c.c. |
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JCook5003
Registered Users
Posts:5
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| 09/05/2008 5:06 AM |
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| Thanks for the info guys, based on what woulfcc said, a concrete roofing system wouldnt fit into my budget anyway, looks like I'm back to floor trusses with SIPs or a normal Single Plane roof with trusses and OSB+Spray insulation |
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saigafan
Registered Users
Posts:12
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| 09/06/2008 1:19 PM |
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I am thinking about precast concrete, here is a link. It has an R-20. ICF and that roof looks like a good deal. they have it up to 20 feet in length.
http://www.safecrete.com |
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saigafan
Registered Users
Posts:12
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| 09/07/2008 1:30 PM |
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Another question that may help Jcook and me is:
plumbing needs vents for the toilets, etc. How does one go about doin this with the minimum ammount of holes in the ceiling.
I saw the AAC slab system. this does not require a traditional roof, its just panels that are morter together with specialized cement and rebar. Its totally water proof, which will save costy for a no roof. Or does everyone with a AAC roof still make a traditional slope roof?
I live in south texas, never snows except maybe every 90 or so years :) |
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dmaceld
Registered Users
Posts:494
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| 09/07/2008 4:42 PM |
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Posted By saigafan on 09/07/2008 1:30 PM
Another question that may help Jcook and me is:
plumbing needs vents for the toilets, etc. How does one go about doin this with the minimum ammount of holes in the ceiling.
Ceiling? You pretty much don't. Each toilet, sink, tub, shower, etc., needs a vent going up. You could cross connect some of them, maybe, in the ceiling joist space. Of course most of the vents go through the top plate of each wall so are not in the ceiling.
Now, if what you meant was minimizing holes through the roof, that's doable. You cross connect the vents in the attic space tying several smaller vents into one larger vent. What you have to watch out for though, is the code limit of no more than 1/3 of the total developed length of the vent being horizontal, i.e., less than 45 degree slope, unless the vent is a least one pipe size larger than the min required size.
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Building house - what a way to spend retirement! |
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Alton
Registered Users
Posts:314
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| 09/07/2008 9:21 PM |
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Saigafan,
Have you considered using Studor Valves in lieu of some plumbing vents. Code approved in my area.
See http://www.studor.com/index2.htm |
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Alton C. Keown
Residential Designer and Construction Technology Consultant
Auburn, Alabama
334 329-0957 AT&T Cellular |
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saigafan
Registered Users
Posts:12
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| 09/08/2008 12:44 PM |
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Thanks for the Info.
The Studor vents seem to be the best answer. Now I know that I have to have vents. Sorry about the question. I am a total newbie to this.
Since the AAC panels seems to be a good ceiling (for the cost), I can always use a metal roof. I can have the Studor vents in the attic, which I will ask the building codes people for pre-approval. (in a couple of years when I can start building it, lol)
One of the AAC companies that imports it from Mexico is only 60 minutes away. So those freight charges will be almost none. hehehe. |
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ICF372
Registered Users
Posts:219
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| 09/15/2008 7:04 PM |
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We are nearing compleation of a 1.5 storie 4,600 square foot , slab on grade - intermeadaite concrete floor and 2 sided ICF roof home.
This home uses speed floor and IngegraSpec ICF for the walls and roof.
This is fairly simple design, eventhough there are 12 gables and seven roof elevations
Some of the smaller roofs have been poured monolithly with the wall gables
Other than myself all workers are Rookie ICF'ers
We even used brick ledge forms for a traditional look
This house will cost more than traditional roofs would have, but assureance cost much less than cheap lumber. |
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Eldon Howe
Howe Construction
Total Concrete Homes provide positive cash flow , DAY ONE . |
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icfcontractor
Registered Users
Posts:237
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| 09/15/2008 8:58 PM |
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Eldon,
Good to hear from you, thought the summer was taking its toll and you had gotten lost in the vortex of the building season. We too are nearing completion of an extremely complicated 3 story ICF building 72 % covered in earth with concrete floors concrete walls and a concrete roof. We used the Logix system for the walls and one of the parent companies for Logix, Beaver Plastics, has a floor system that we have extensively tested and is ready for prime time. I believe it will be anounced at the ICFA show in Portland the end of this month. Here is a picture of the 3rd story garage roof being placed.
ICF Contractor |
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ICF372
Registered Users
Posts:219
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| 09/17/2008 6:24 PM |
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Great photo, I love to see advancement in ICF and acceptance.
I can't figure how to add a photo. Any help? |
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Eldon Howe
Howe Construction
Total Concrete Homes provide positive cash flow , DAY ONE . |
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