Flooring Ideas?

[Bedlam]

I was hoping for some input to pros and cons of two different flooring ways.
Basicasly I have 2x6 joists set at 16 inch on center,proper support etc.this floor will use just under 6 sheets so relatively small are and is going to get glue down tiles. (not stick down)
whats in question is
First idea is to use 3/4 inch plywood and "box" in there the joints come on the butting edges between the joist.And then a luan subfloor before the tiles.
The second idea, is to use 3/4 T and G (OSB) (andantec)as a subfloor.The person doing the tiling wishes this and on ly this (no sub luan on top).
My opiniopn is eiother way Id want the luan for future removal ease and not ruining the 3/4 plywood or Advantec.(OSB).
Any opiniones are well welcomed.

 

[Egon]

Consider 3/4 tongue and grove plywood. Might cost more than OSB board but for a small area the difference is negligible.

Look at a Schluter system membrane for on the subfloor.

Schluter-DITRA - Schluter-Systems

 

[kthompson]

Did the person who will be installing give you reason why he did not want the luan? Some glues or dyes will bleed through some flooring, could be his issue. For my nickel one layer of 3/4 anything thing in wood flexes on 16 inch floor joist. Up until a few years ago the floor joist system was used on most construction here. The use of two layers of wood was always done and then 3/4 t&G plywood was used to save cost. Guess it did that but the few floors (concrete is now the norm construction here for floors) that I have been on it was bouncy. That even from one friend who weighs like 160 pounds. Something you need to look at is where that floor joins at such as doors to get same thickens to prevent the heel or toe trips.

 

[LarryRB]

As I type this, I am going over our floors now,., House is 45 yrs old, has 3/4 plywood sub floors throughout. In one area, 600+ sq ft, was linoleum glued down,. Was suppose to look like bricks... We pulled all this up 6 months ago, put down luan and then peel and stick linoleum tiles. And not just "cheap" peel and stick.... Now, the peel and stick is pulled up, the luan is up, I am sanding some of the glue residue from 45 yrs ago, and laying down porcelain tiles, thin set and grouting,.. I would never use OSB for flooring simply because when it gets wet, it expands like a sponge, Here in New England with all the snow and rains we get, there is just way too much water put on floors, never mind an accident or spill by accident on same. I would stick with heavy t & g glued and screwed plywood.

 

[RonMar]

I don't use OSB for anything unless I abslutely have to, and certainly not for a floor. 3/4 or thicker T&G ply glued(construction adhesive) and screwed to the joices, as used in "silent floor" systems...

 

[TheKid]

A great place to get go info on tile installation.
Ceramic Tile Advice Forums - John Bridge Ceramic Tile

 

[nolefan]

If your guy was talking about Advantech sheathing then moisture is not a concern. My builder installed this in our house as the subfloor and it is rated to withstand a pretty good amount of moisture. We had several good rains before we got the house dried in and there has been no problems at all. I'm not clear on whether your installing ceramic tile or vinyl flooring? If ceramic you need a layer of cement board firmly secured and taped and mortared at the joints to avoid any cracking later on. If vinyl, I would still want another layer of something smooth like luan because I would be worried about the somewhat rough surface of the advantech projecting through the vinyl. Also, as you and other have mentioned, it makes it alot easier if you decide to change the flooring in the future.

 

[Bedlam]

Wow thanks so far. all good ideas and feedback.Yes the guy is calling it advantech the local Home Depot said that was a brand name and it was same as OSB TG If this is correct or not im not sure

 

[nolefan]

It has been about 5 years since we completed building but if I remember correctly Advantech is not to be compared with regular OSB and unfortunately I believe the difference in price reflects this! I do believe the extra cost is worth it when your flooring may be exposed to the elements during construction but if you already under roof then regular OSB should work.

 

[E_Sanborn]

I ..... have 2x6 joists set at 16 inch on center,proper support etc. this floor ....is going to get glue down tiles. (not stick down)

I am assuming ceramic tile in my feedback. Other materials have different requirements.

The John Bridge forum is an excellent resource for tile, even for DIY'ers.

Deflection requirements for ceramic tile are considerably more rigorous than your 2x6 floor framing will likely provide. The reason for for this , other than structural integrity, is that masonry materials are inherently inflexible and brittle. Thinset, tiles, and grout will crack if significant subfloor flexibility is present, around a modulus of L/270-L/320 is more or less an accepted standard for elasticity in the subfloor to be tiled.

The john bridges forum will have links to resources that detail the various industry-standard practices which are commonly accepted for durable installation under varying service conditions.

Otherwise, only contribution I can make is: The choice of one or another type of sheathing product; Advantek vs regular plywood should not make too much of the "weathering qualities" of the material. Treated sheathing is great for limiting moisture damage during short exposures during construction, its a completely different matter to consider a material which may become saturated for say a decade or two... the idea is to prevent the subfloor from becoming saturated..

 

[/pine]

First idea is to use 3/4 inch plywood and "box" in there the joints come on the butting edges between the joist

maybe I am reading this wrong...but all the but ends of the plywood or OSB (T&G w/ glue is highly recommended) should break on top of a joist?

sorry if missed something and this is off the wall...

 

[2manyrocks]

I'm a little confused here. Are we talking glue down vinyl flooring or ceramic tile? If it is ceramic tile, I thought the subflooring needed to be something like 1 1/4 inch thick to stop any deflection that would crack the tile.

 

[CinderSchnauzer]

If you really want to do the job right for ceramic tiles use Schluter Ditra.

Schluter-DITRA - Schluter-Systems

 

[Carykong]

2x6 floor joists on 16" center will deflect/bounce with 3/4" t&g or OSB or plywood. recommend that you mate another 2x6 to each existing joist. generous with the nails,liquid nails would help too.

 

[CurlyDave]

2x6 floor joists on 16" center will deflect/bounce with 3/4" t&g or OSB or plywood. recommend that you mate another 2x6 to each existing joist. generous with the nails,liquid nails would help too.

Unless the span is very short, I agree 2x6 will deflect.

If you can take all the load off the floor by removing everything in the room, and if you have access to the bottom, consider adding a layer of 3/4 OSB or plywood on the bottom of the joists. Screwed and glued with liquid nails. Let this set up & dry for a couple of days before walking on the floor.

As far as the flooring goes, for vinyl, flexible stuff, they used 3/8 pressboard on top of our OSB subfloor in the kitchen and it has been very good. I would use this before I used luan.

Our floors are 3/4 OSB on 12" centers and have no bounce at all. Now we kept the BCI span to about half of the claimed amount and that helped a lot.