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fuggy
New Member
Posts:4
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| 30 Jun 2007 01:26 PM |
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RE Gutters:
Because we are building in the hurricane zone I am going to tilt the flat ICF roof towards the street (don't want hurricane type rains funneled into my backyard). Couldn't I just have the gutter formed as part of the roof? That way it wouldn't be a separate structure that the hurricane would blow off. I haven't got the part figured out how it gets from the roof to the earth, though. (Without being a separate pipe a hurricane would rip off). Any ideas? |
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icfcontractor
Basic Member
Posts:277
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| 01 Jul 2007 02:24 PM |
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Fuggy,
In the design, we are building, the gutters are lineal drains built into the concrete. So yes it can be done.
ICF Contractor |
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ICF372
Basic Member
Posts:111
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| 04 Jul 2007 10:55 PM |
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No need to worry about isolation or thermal bridging with this system.
We simply use the speed floor joist as rafters and insert a 4" icf form.
The icf form is continuous from the footing to the peak of the roof ,gables same thing.
the house in the photo has icf hip roof. just look at the photo. osb can be screwed directly to the icf form and shingles are applied.
With this system you have lots of room for utilities beneath the icf roof inside the speed floor cavity.
No additional insulation is needed as it is a ICF roof.
Eldon Howe |
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Eldon Howe<br>Howe Construction
[email protected]
<br><br>Total Concrete Homes provide positive cash flow , DAY ONE . |
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icfcontractor
Basic Member
Posts:277
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| 06 Jul 2007 09:14 AM |
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Eldon,
It must be early, I am not following how you did your roof with speed floor anf 4" icf. can you explain in more detail?
Thanks
ICF Contractor |
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ContractorPete
Basic Member
Posts:115
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| 06 Jul 2007 11:40 AM |
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Yeah im a little confused too, pics would be awesome.
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| [email protected]<br> |
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ICF372
Basic Member
Posts:111
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| 10 Jul 2007 04:55 PM |
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We simply used the 200 series joist as rafters and instead of using plywood as the casting bed we used a 4"icf form, follow the reinforcing schedule. We poured the concrete from the peak and internally viberberated both sides. add foam to the peak and that's it. The steaper the better.
My pictures are to big to send . e-mail me. |
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Eldon Howe<br>Howe Construction
[email protected]
<br><br>Total Concrete Homes provide positive cash flow , DAY ONE . |
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jmagill
Basic Member
Posts:374
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jmagill
Basic Member
Posts:374
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ICF372
Basic Member
Posts:111
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| 11 Jul 2007 07:10 PM |
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Thanks for loading those photos Jm,
What you see in the photos above, is the icf forms resting directly on top of the lock bars. No additional shoring was needed.
The hip roof is in the bay beyond using much shorter speed floor rafters. But done in the same way. I don't have any good photos of the hip. |
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Eldon Howe<br>Howe Construction
[email protected]
<br><br>Total Concrete Homes provide positive cash flow , DAY ONE . |
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vermaraj
New Member
Posts:34
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| 11 Jul 2007 09:16 PM |
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That's interesting! Are the icf blocks running parallel or perpendicular to the speed floor rafters?
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ContractorPete
Basic Member
Posts:115
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| 11 Jul 2007 09:26 PM |
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do you have any pictures of the roof from the outside? Did Speedfloor back their product warranty with this method? What kind of engineered steel reinforcement did this require in comparision to the usual wire mesh? One more question how difficult/unconfortable did you feel walking on the forms on the roof? Its a cool idea just seems a little dangerous using an icf product for the roof given that the icf was not designed nor intended for that type of application.
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| [email protected]<br> |
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ICF372
Basic Member
Posts:111
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| 11 Jul 2007 09:48 PM |
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The icf blocks ran perpendicular to the speed floor joist, so the plastic studs run up hill 90 to the lock bars providing support for the foam block.
The casting bed safety is always up to the builder. We screwed osb to the top of the icf as we went, so it was plenty strong. Even without the osb. We had support every 12" to 16" with the lock bars , that's way more support than say lightdeck or insuldeck.
The entire house walls and roof had no#4 bar both ways no mesh. Per engineering.
We used a knock down 4" formtech form, so re bar was easily placed. |
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Eldon Howe<br>Howe Construction
[email protected]
<br><br>Total Concrete Homes provide positive cash flow , DAY ONE . |
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ContractorPete
Basic Member
Posts:115
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| 11 Jul 2007 09:56 PM |
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Yeah I can see now that it would be more doable with the osb installed on top of the icf as you went up. Congrats on a cool job. That is the first full icf roof I have ever seen/heard about.
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| [email protected]<br> |
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icfblocks
Basic Member
Posts:202
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| 11 Jul 2007 10:04 PM |
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Many times things are applied completely out of there intended use. Remember Ben Franklin's application using a kite and a house key. Many great things have been created by people taking chances and "thinking completely outside the box". |
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| Thanks,<br>Tom<br>www.advbuildingtech.com |
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icfcontractor
Basic Member
Posts:277
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| 14 Jul 2007 09:39 AM |
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Eldon,
That is a cool idea for the roof. I was curious if you increased you slump to get it to flow better since you are now pouring down a slope and not straight up and down?
We started our monster house with some monster footings. 5 feet wide across the front and 7 feet wide across the back with a double layer of rebar 7- #4 longitudinal and #5 transverse at 11" on center. We also have a 10' x 10' footing slab under the elevator pit with #5- 1' OC EW (on center each way) Some of these walls will retain 21 feet of back fill plus they are supporting 3 stories of concrete walls, floors, and roof.
ICF Contractor |
 Attachment: footing pic.jpg
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insuldeckflorida
Basic Member
Posts:158
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Raul Hinojosa
New Member
Posts:40
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Raul Hinojosa
New Member
Posts:40
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ReadyToRetire
Basic Member
Posts:212
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| 19 Oct 2008 12:03 PM |
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That looks like a strong and durable roof.
Do you have a WAG on the cost difference between that roof and comparable truss and SIP roofs?
Very respectfully,
Larry
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Raul Hinojosa
New Member
Posts:40
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| 19 Oct 2008 12:21 PM |
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Typically cost 25 to 30% more than a truss system. Here at Miami area specifically in a 4400 sq. ft one story residence (one story) cost $4,000 more than a conventional trusses system, but the homeowner is getting $5000 reduction in his insurance, so is paid in one year the difference, after that just in insurance is all savings, without count the energy efficiency and the default interior open space, that architecturally talking is very nice.
Regards. |
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