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Sub Floor question SteveC 01-24-2008
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Posted by SteveC on January 24, 2008, 12:21 pm
I am putting a basement apartment in my house.
Putting down a subfloor, 2x3 strapping with 1" styrofoam covered with 5/8
T&G Plywood, strapping on 16" Centers.

What would be the best to fasten the strapping to the concrete? Was
thinking first a bead of PL400 adesive glue and then renting a hilti powder
Actuated gun to put a couple of concrete nails in each 8 foot length.

Is this overkill?

I have a air powered framing nailer, would that drive the nails into the
concrete?

Any insight would be appreciated.

Thanks,
Steve



Posted by Robert Allison on January 24, 2008, 12:56 pm
SteveC wrote:
> I am putting a basement apartment in my house.
> Putting down a subfloor, 2x3 strapping with 1" styrofoam covered with 5/8
> T&G Plywood, strapping on 16" Centers.
>
> What would be the best to fasten the strapping to the concrete? Was
> thinking first a bead of PL400 adesive glue and then renting a hilti powder
> Actuated gun to put a couple of concrete nails in each 8 foot length.
>
> Is this overkill?
>
> I have a air powered framing nailer, would that drive the nails into the
> concrete?
>
> Any insight would be appreciated.
>
> Thanks,
> Steve
>
>

The PL400 is the perfect tool for the job. You might buy some tapcons
and shims in case you have a low spot or need to mechanically fasten the
sleepers (the correct term for what you are calling strapping). I once
saw a detail for this method that described laying the sleepers "in a
river" of PL400. I like that term. It describes how I do it. Get the
larger tubes and a large caulk gun.

--
Robert Allison
Rimshot, Inc.
Georgetown, TX

Posted by SteveC on January 24, 2008, 1:27 pm

"Robert Allison" wrote

>
> The PL400 is the perfect tool for the job. You might buy some tapcons and
> shims in case you have a low spot or need to mechanically fasten the
> sleepers (the correct term for what you are calling strapping). I once
> saw a detail for this method that described laying the sleepers "in a
> river" of PL400. I like that term. It describes how I do it. Get the
> larger tubes and a large caulk gun.
>
> --
> Robert Allison
> Rimshot, Inc.
> Georgetown, TX

Thanks for the tips. I'm gonna go with PL 400, then concrete nails if
needed .
Thanks.




Posted by on January 24, 2008, 1:05 pm
wrote:

>I am putting a basement apartment in my house.
>Putting down a subfloor, 2x3 strapping with 1" styrofoam covered with 5/8
>T&G Plywood, strapping on 16" Centers.
>
>What would be the best to fasten the strapping to the concrete? Was
>thinking first a bead of PL400 adesive glue and then renting a hilti powder
>Actuated gun to put a couple of concrete nails in each 8 foot length.
>
>Is this overkill?
>
>I have a air powered framing nailer, would that drive the nails into the
>concrete?
>
>Any insight would be appreciated.
>
>Thanks,
>Steve
>

I agree with Robert on the PL400, just be sure your code does not
require PT lumber for that. In Florida all lumber in contact with
concrete must be PT. I am not sure what other areas require but it
does make good sense to do it.

Posted by SteveC on January 24, 2008, 1:25 pm
Not required here in Newfoundland.
Thanks.

>
> I agree with Robert on the PL400, just be sure your code does not
> require PT lumber for that. In Florida all lumber in contact with
> concrete must be PT. I am not sure what other areas require but it
> does make good sense to do it.



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