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Old 02-10-2010, 02:45 PM  
orna
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Default sub floor

Is it true that we need to replace the particle board sub-floor in order to install a hard floor? ply wood sub floor will be much better?



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Old 02-10-2010, 04:01 PM  
Wuzzat?
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Quote:
Originally Posted by orna View Post
Is it true that we need to replace the particle board sub-floor in order to install a hard floor? ply wood sub floor will be much better?
The modulus of elasticity (MOE) is a measure of stiffness.
For MDF it's 0.53, for particle board it's 0.7, for fir plywood it's 1.2
so plywood is definitely stiffer.

MDF FAQ - Tutorial
http://www.springerlink.com/content/p48tw34747rtw866/

What stiffness do you need?


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Old 02-10-2010, 04:19 PM  
Rich P
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Is it particle board or OSB?

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Old 02-10-2010, 06:22 PM  
barrycarlton
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Knee jerk answer is.....yes!!!!

That said, what floor are you installing?

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Old 02-11-2010, 10:54 AM  
Bud Cline
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Particle board will not hold on to a fastener all that readily when under foot daily.

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Old 04-24-2010, 10:11 AM  
EmaRich
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Sub floor bracing is provided to transfer sideways loads down to the ground.
Bracing needs to be provided at all levels to work. Imagine a building in a wind that had bracing to resist the wind at the roof and wall levels, but not at the sub floor level.



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