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Old 09-05-2007, 03:19 PM   #1
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Sub Floor Blocking?


I'm building a house. I'm getting ready to do the sub flooring. All the engineered floor joists, support beams, and pressure treated plywood and sill plates are installed. All the blocking down the middle of the floor joists is installed. My plans, as drawn, don't show adding blocking for nailing between the edges of the 4'X8' 3/4 subfloor plywood as I would do on the roof sheathing. On line drawings of installing the engineered floor joists don't show putting in blocking for nailing edges. Could it be that it isn't necessary?

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Old 09-05-2007, 03:38 PM   #2
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Sub Floor Blocking?


I am not a contractor, just a long-time DIYer.
If your joists are on 16" centers, which I'm sure that they are, you do not need end blocking for full sheets of plywood.
Blocking between joists normally would only be necessary if you're flooring around plumbing, such as a toilet bend, with smaller flooring pieces.
Mike

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Old 09-05-2007, 08:19 PM   #3
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Sub Floor Blocking?


You should be using t & g plywood for the subfloor, so there would be no need for continuous blocking under the seams.
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Old 09-06-2007, 09:13 AM   #4
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Sub Floor Blocking?


I've thought about that. The plans say to use OSB. OSB is a lot cheaper but has to be glued and nailed before the glue sets and it is hard to screw down when it gets squeeky. It also doesn't take moisture very well and since it's me and my wife building this strawbale house, it will have to be in the weather a long time before we get the roof over it. I think a good grade plywood liberaly coated with a weather proof sealer or paint would be the best option.
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Old 09-06-2007, 10:28 PM   #5
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Sub Floor Blocking?


Invest is a covering tarp whether you do ply or OSB. Water is the devil.
Ron
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Old 09-06-2007, 11:40 PM   #6
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Sub Floor Blocking?


T&G OSB and then go and buy OOPS paint from wherever you can get it cheap and paint it real thick on there. It will help it last a lot longer in the weather.
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Old 09-07-2007, 05:30 AM   #7
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Sub Floor Blocking?


Look into:

http://www.huberwood.com/main.aspx?p...antechflooring

(It's what we use and what we recommend)

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