I have to replace my blown chipboard flooring, and will be using plywood to do this., but which type

i have spoken to my timer supplier (arnold Laver) they have recommended
2400x600x18mm Weaver Spruce Tounge groove plyboard for my floor.

Due to is been tounge and groves it will be stronger at the joints, but i will have 3 joints going across the floor.

Or i get 2240x1220x18mm exterior ply and will have a joint either where i'll stand using my sink or the entrace door (dependant on where i start to lay), or just where my bath ends (under the last tile) if i lay it right to left

I am thinking the stronger weaver spruce due to it been tounge and grooved joins, and will have less chance of movement and squeeks

I am using Ardex 7001 on the floor and priming it with BAL APD Primer

Do I have to place anything over the joints, like the plasters jointing mesh??

any ideas on my above post as i need to get it for the weekend

hi npinks go for the exterior ply.just put extra noggins to stiffen the floor where your unsure about and ensure the floor is rigid,sound,clean,dry and free from any contaminating barrier. plywood floors must be primed on the reverse face and edges and screwed every 300mm.good luck

I'd use wbp ply (water, boil proof)

thats a great floor as long as you don't want to lay tiles on it Spruce is soft wood i believe you can get wpb tongue and grove I am using Ardex 7001 on the floor and priming it with BAL APD Primer is that what ardex and bal recommend ? :Pete

It is essential the Ardexflex 7001 is used with Ardex P51 primer, NOT bal. The ardex stuff is designed as a System and should be used as such.

The flooring should be sealed on the reverse face and edges with polyurethane varnish before laying to have any hope of having a manufacturers warranty.

Originally Posted by grumpygrouter

It is essential the Ardexflex 7001 is used with Ardex P51 primer, NOT bal. The ardex stuff is designed as a System and should be used as such.

The flooring should be sealed on the reverse face and edges with polyurethane varnish before laying to have any hope of having a manufacturers warranty.

thanks for the advice there, need the BAL for the walls, so i shall get some Ardex P51 too, my supplier said the BAL was ok

and see where i can get T&G WBP PLY

I read on here that you can seal the wood with the BAL, or does it have to be a polyurethane varnish?

got myself 22mm WBP Plywood with tongue & groove
Ardex p51 primer
and a whole load of screws on order

Originally Posted by npinks

thanks for the advice there, need the BAL for the walls, so i shall get some Ardex P51 too, my supplier said the BAL was ok

and see where i can get T&G WBP PLY

I read on here that you can seal the wood with the BAL, or does it have to be a polyurethane varnish?

You can use the P51 on the walls if you wish, may have to dilute it first though. Ardex state Poly Varnish for sealing not acrylic primer, you are best to follow recommendations form the addy manufacturer where ever possible.

Which BAl product you talking about? APD or Bond SBR?

Originally Posted by npinks

got myself 22mm WBP Plywood with tongue & groove
Ardex p51 primer
and a whole load of screws on order

its good to see peps taking good advice well done mate thats what this is all about :Pete opps sorry about the humor

using BAL ADP as it was recommended on here to use that, nothing was said about SBR (i hope thats correct )

as per my other thread, in the "prep area" on the forum, will be going on to tile stripped plasterboard using BAL Flexi

edit to add
Just been out to buy the poly varnish, extra tough matt coat by Ronseal is that suitable???

Originally Posted by npinks

using BAL ADP as it was recommended on here to use that, nothing was said about SBR (i hope thats correct )

as per my other thread, in the "prep area" on the forum, will be going on to tile stripped plasterboard using BAL Flexi

edit to add
Just been out to buy the poly varnish, extra tough matt coat by Ronseal is that suitable???

yes mate that will be fine. it is just for sealing to protect against moisture ingress.

Thanks for your help on this

What a great forum full of helpful people