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Old 12-15-2011, 10:10 AM   #1
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well after trying dricore last year for 1/3rd my basement and HATING it, too nosiy, too spongy way too much work to level and costs way more, I am doing the rest of my basement with Plywood and XPS foam

I calculated this at under half the cost of dricore and a lot easier to do since I can do 32 sq ft at a time...

I want to put XPS foam down straight on the concrete, some people said glue it others said dont, not sure what is best here.. tape all the seams with housewrap tape.

put foamboard glue down so each plywood sheet is glued to the xps foam

put down a layer of plywood going the opposite direction so you have perpendicular overlapping seams

use flat head tapcon screws, not sure how many you need for a sheet of plywood I've heard as little as 10 and as many as 50 and no one seems to specify a spacing pattern or should the outsides be screwed leaving the inside alone, or do it like a drywall screw pattern?...

anyone have any advice on this?

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Old 12-15-2011, 10:18 AM   #2
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Renting a Hilti gun or a Rochester ram set will be a lot faster then tap-cons.

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Old 12-15-2011, 10:25 AM   #3
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Renting a Hilti gun or a Rochester ram set will be a lot faster then tap-cons.

Sent from a Samsung Galaxy S2
it wouldn't cause any issues with pulling the plywood into the xps or anything that would cause bumps? Screws you can torque down or out, never worked with a ram set before not sure what to expect in that area with this type of project?

if i went the ramset path i still am not sure on the number of nail down points
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Old 12-15-2011, 10:42 AM   #4
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it wouldn't cause any issues with pulling the plywood into the xps or anything that would cause bumps? Screws you can torque down or out, never worked with a ram set before not sure what to expect in that area with this type of project?

if i went the ramset path i still am not sure on the number of nail down points
They have different caliber of loads to control depth. Then you just go bang bang bang. Make sure you wear ear-plugs, esp. in a basement. I'd probably put them every 18" or so.
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Old 12-15-2011, 11:09 AM   #5
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well after trying dricore last year for 1/3rd my basement and HATING it, too nosiy, too spongy way too much work to level and costs way more,
Jheeeezh! FINALLY! AN HONEST PERSON WHEN IT COMES TO THE MERITS OF DRI-CORE.


Dri-Core has no merits.
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Old 12-15-2011, 11:13 AM   #6
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Jheeeezh! FINALLY! AN HONEST PERSON WHEN IT COMES TO THE MERITS OF DRI-CORE.


Dri-Core has no merits.
at first I thought it was a great idea, until I started putting it in, then that changed fast.... after a year with it, gag me
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Old 12-15-2011, 02:23 PM   #7
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anyone know if the XPS should be glued down to the concrete or should it just float? I've read contradicting things on that, but everyone says glue the plywood to the xps it seems like
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Old 12-15-2011, 10:47 PM   #8
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No glue, just use t&g plywood or biscuit joint; http://www.buildingscience.com/docum...g-your-basment Unless carpet, then perimeter fastening for the stretch....

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Old 12-16-2011, 10:14 AM   #9
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No glue, just use t&g plywood or biscuit joint; http://www.buildingscience.com/docum...g-your-basment Unless carpet, then perimeter fastening for the stretch....

Gary
Yeah I found that the other day and it just leaves me with more questions

The method in figure 1 is the one I've been looking into, but it says one layer of 1/2" ply fastened or two 1/2" ply overlapping with offset joints glued... but then the article says toung and grove ply, I dont know but I've never seen 1/2" plywood that is toung and grove unless I've missed it around here... usually dont see that until you get into the 23/32 range

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