HI all
I hope you are all having a pleasant saturday. I have a question for comments. if any one has some insight I have a client with a sun room insulated and heated. with 1×4 t&g fir over 2×8 joists She wants us to install 2 1/4 strip oak over it running in the same direction. any thoughts about the success with out ripping the floor up and installing plywood.
thanks
Replies
Greetings buck,
This post, in response to your question, will bump the thread through the 'recent discussion' listing again.
Perhaps it will catch someones attention that can help you with advice.
Cheers
'Nemo me impune lacesset'
No one will provoke me with impunity
What they have isn't much different from the traditional subfloor for oak. The problem (if any) is with running it the same direction.
happy?
Hi Buck,
I don't have the numbers handy for the expansion on the two woods, but strongly suspect that they will expand and contract at different rates. I foresee a problem. Could you at least run the oak on a diagonal - 45 degrees from the existing?
Don K.
EJG Homes Renovations - New Construction - Rentals
While I think it's a shame to put oak over a nice fir floor, my house has the floor you're describing. It's 3/8" t+g oak over 1x4 fir (both running same direction) over diagonal 1x8 shiplap pine. The oak is naile through the tongues, not face nailed like some that I see. It's been working fine for the last 50 years or so, I would guess.
But the humidity is low all year round where I live. A lot of expansion and contraction might be bad news for that floor.
zak
I would expect that floor to develope squeaks the day after it is finished that would get worse as time goes on'
I would plan to place 1/2" underlayment over the fir with const adhesive and screws @ c.8" oC, then install the oak over that. If there is no elevation for that extra 1/2", the optrions would be to lay a flaoting engineered floor with pad, or to remove the fir and place a new subfloor 3/4"
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Why would the oak floor squeak more nailed into the fir than it would nailed into 3/4" plywood? This is of course assuming that there are no squeaks in the fir floor. Is it because some of the nails would find their way into the joints?
With the two floors running parallel, you're going to end up with a lot of joints over joints. Any slight looseness in the fir flooring will allow the oak to rock underfoot, likely resulting in squeeking at the T&G joints, and possibly resulting in flooring that won't stay put well.At least that's my gut feel. It may well be that the effects are sufficiently minor that they can be ignored. At least the customer should be warned of a potential problem.
If ignorance is bliss why aren't more people
happy?
You'll get movement with traffic, and a good many fasteners will split the fir as well as hitting air
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Yeah, I hadn't thought about the air nail problem. Can be avoided if you're lucky with the relative pitch of the two surfaces, but could bite you big time if not.
If ignorance is bliss why aren't more people
happy?