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We’re doing a remodel of a 100 year old house, and when we demo’ed the floor, I expected to see a 3/4″ finish floor on top of a 3/4″ sub floor. All we have is a 3/4″ finish floor, T&G finish floor on top of the joists. The Joists are 2×10 net not 1 and 1/2 x 9 and 1/2, 16″oc.
We would like have new finish floor and new tile. I thought we would want to have a plywood subfloor and finish floor on top of that, but it really plays hell with the doors, the casings etc.
After looking at the situation, we elected to go with what was there, 3/4″ finish flooring T&G.
For the tiled areas, I can’t do 3/4″ ply, as it is way too flexy, so we went with 1 and 1/8 T&G ply, with 1/4″ hardibacker over that. It still raises the floor higher than I would like, but I can see no way around the issue.
Any way you guys can see to provide the support for the tile, without 1/ and 1/8 subfloor?
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Tom,
There was a thread about two months abo that talked about the problems with raising an old floor for leveling or adding new flooring. You may have a problem. Are the floor joists straight. Many times the old floors were not they would actually back out the bottom side of the floor to straighten it. Was this flooring originally 3/4 or 5/4.
Cutting a door is a small problem. You could use a 1/2 subfloor. Order a 5 or 7 ply plywood. I havent used this in years but you should be able to find it. You may habe to to meet code. in the tile area, nail a ledger about an inch down on the joist. Put 1/2 inch cdx on top and use a mortar bed. My specialty is renovating old houses. Zap me an e-mail if you have and questions.
Rick Tuk
*Hi Tom.In a circumstance such as you have described, I suggest as follows:You know that the existing floors use 3/4" finish, which is the tongue and groove. While that by itself may be minimally sufficient, I like the idea of adding subfloor.To add such subfloor, cut the plywood so that it fits in between the joists and ending flush with the top of the joists.Below the subfloor, sister 2x8s. Use plenty of PL400 and #10 nails, 4-6" on center. Blocking is important.Now nail your finish floor to the diaphragm, which is the sum of all joists, blocking and subfloor connected together.Hope this helps.
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We're doing a remodel of a 100 year old house, and when we demo'ed the floor, I expected to see a 3/4" finish floor on top of a 3/4" sub floor. All we have is a 3/4" finish floor, T&G finish floor on top of the joists. The Joists are 2x10 net not 1 and 1/2 x 9 and 1/2, 16"oc.
We would like have new finish floor and new tile. I thought we would want to have a plywood subfloor and finish floor on top of that, but it really plays hell with the doors, the casings etc.
After looking at the situation, we elected to go with what was there, 3/4" finish flooring T&G.
For the tiled areas, I can't do 3/4" ply, as it is way too flexy, so we went with 1 and 1/8 T&G ply, with 1/4" hardibacker over that. It still raises the floor higher than I would like, but I can see no way around the issue.
Any way you guys can see to provide the support for the tile, without 1/ and 1/8 subfloor?