Subfloor Requirements

Second Look

I removed some 5/8" plywood with vinyl flooring attached to it. The subfloor under that is 11.25" x 13/16" T&G. Is the ~7/8 T&G sufficient to carry the new 3/4" hardwood floor, or do I need plywood on top of the T&G?

__________________
Second Look home improvement www.SecondLookHome.com
Handyman and Home Repair Specialist in Rhode Island
RI Licensed Lead Safe Remodeler/Renovator, RI Registered & Insured Contractor

TNGHomes

Is the T&G sub in good shape, I have always found that t&g subfloors are not as smooth and flat as I would want so I typicaly nail and glue 1/2 over it to keep the HW from any possible movement. The thickness isnt an issue (13/16) but if there is a wavyness on the surface it will cause problems down the road. Also CDX plywood holds flooring nails better than pine. Of course this is just my opinion, but check with the manufacturer to be safe.

Second Look

Do you think 1/4" would help, or is 1/2" really the way to go? I am a little concerned about waviness, especially since this is a low-cost Bruce hardwood where there are lots of small pieces.

__________________
Second Look home improvement www.SecondLookHome.com
Handyman and Home Repair Specialist in Rhode Island
RI Licensed Lead Safe Remodeler/Renovator, RI Registered & Insured Contractor

Second Look

Does anyone have feedback on this? I would like to get some 1/4", glue and nail it over the 7/8 T&G then put the hardwood over that. It's easier to work with 1/4" than 1/2", plus the ceilings are a little low.

__________________
Second Look home improvement www.SecondLookHome.com
Handyman and Home Repair Specialist in Rhode Island
RI Licensed Lead Safe Remodeler/Renovator, RI Registered & Insured Contractor

mack9110000

If the T&G is wavy 1/4" ply will mask it temporarily,1/2" would be a lot better,if there's an issue about the height have you considered sanding out the waviness.I've done this in the past and it's worked out well.

ron schenker

I'm surprised the vinyl had 5/8" under it? That seems like overkill? Or am I missing something?

__________________
Don't worry, the baseboard will hide it!

Second Look

The vinyl butted up to 3/4" hardwood, so the 5/8 was just to get the height even.

The T&G isn't wavy, but the Bruce hardwood we're using has some pretty short pieces and I want to make sure the hardwood has a firm smooth underlayment. Will be using 1/4".

__________________
Second Look home improvement www.SecondLookHome.com
Handyman and Home Repair Specialist in Rhode Island
RI Licensed Lead Safe Remodeler/Renovator, RI Registered & Insured Contractor