Have I fudged up?! Wrong plywood ??

[Chris1991]

I've just finished replacing my old ruined floorboards with 18mm plywood.. All went well and smooth.
I got the ply from wickes where it was simply marked up as hardwood plywood 18mm..(8x4)

Was about £30 a sheet and seemed nice and solid.
Now the jobs done and I've been having a look about online I realised the wood I have says 'non structural'

Have I completely messed up?!
My joists are spaces 1foot apart and ive used a truck load of screws.

Without sounding dumb is there a big difference between structural and non structural plywood of the same 18mm thickness

 

[chappers]

It will be fine, just means it doesn't have a structural grading or certification

 

[Chris1991]

It will be fine, just means it doesn't have a structural grading or certification

I'll start putting my hair back in!

 

[dazlight]

Be ok that mate. Good quality plywood from Wickes

 

[Will..]

Square edge ply? Did u route a tongue and groove onto it? Butting square edges up is a recipe for squeaky floors.

22mm P5 T+G chipboard glued and screwed is the way to go.

 

[Chris1991]

Square edge ply? Did u route a tongue and groove onto it? Butting square edges up is a recipe for squeaky floors.

22mm P5 T+G chipboard glued and screwed is the way to go.

I left a 1/8th inch gap between boards and caulked all the gaps. I read on a different thread on this forum from years ago that someone did that and got no squeak issues..

 

[Will..]

Square edge ply? Did u route a tongue and groove onto it? Butting square edges up is a recipe for squeaky floors.

22mm P5 T+G chipboard glued and screwed is the way to go.

I left a 1/8th inch gap between boards and caulked all the gaps. I read on a different thread on this forum from years ago that someone did that and got no squeak issues..

Each to their own

 

[dazlight]

You did right Chris.
T&G I've found rubs as locked together.
18mm leaving 2-3mm gap works well.dome that on a lot of damaged floor board jobs.

 

[Will..]

You did right Chris.
T&G I've found rubs as locked together.
18mm leaving 2-3mm gap works well.dome that on a lot of damaged floor board jobs.

Matter of opinion. I've done loads of T+G floors and they are solid as a rock. Glued joints and glued to joists, no way it's ever going to squeak. Wouldn't catch me doing it your method in a month of sundays.

 

[dazlight]

These will be ones that aren't glued. A lot of them aren't and wring screws are used.
How can plywood screwed to joints squeak ?
I don't do that much as I'm a floor finisher. But have done the old area repairs

 

[Will..]

Agreed that not glued they can make hell of a noise.
Plywood laid in your method with gaps won't, my main worry would be caulk debonding and dropping out.

 

[dazlight]

Good point. With most floors not and heating boards do move.
Best sub floors are 1900-1940s floor boards. Solid.

 

[chappers]

with T and G I always do as will does PU glue to fix to joists and in joints, with ply I have in the past caulked and butted up lightly, but generally don't bother now.
Glue down and provided you use enough screws it won't move so no squeaks.

 

[Chris1991]

No squeaks yet! I also primed some areas and poured some self levelling compound which has been set about 24 hours with no cracks yet! Next job is fibreboard and laminate. The fitting a kitchen next week... This diy stuff seems never ending!!!