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[r1]

got to do some tileing on to floor boards so got to lay some plywood down first to stop flexing but shoulld it be shiney side up or down?
cheers

[jimac]

Plywood doesn't necessarily have a shiny side.  Do you mean hardboard?  If so, I would put it shiny side up.

[Keith ABS]

   Dont matter with the ply as you have to then use a primer to make sure the flexable adhesive takes to it.
Keith B

[redelitev6]

  Make sure it's at least 12mm thick, the 6mm stuff will bounce
easily and the tiles will work loose

[Richie London]

Screw it down about every 6" apart for best results. stops it lifting and cracking the tiles if any water gets under

[STMO123]

Screw it down about every 6" apart for best results. stops it lifting and cracking the tiles if any water gets under

Or use 25mm annular ring shanked nails.

[Richie London]

Screw it down about every 6" apart for best results. stops it lifting and cracking the tiles if any water gets under

Or use 25mm annular ring shanked nails.

i always use screws. you know its not gonna lift again. easier with nails and quicker but more chance hitting yer fingers 

[r1]

thanks
 well i only bought 3.6 mil as i havnt much room and ive laid it shinny side up and sealed it with some watered down emulision
so far so good.

[OOMV6]

thanks
 well i only bought 3.6 mil as i havnt much room and ive laid it shinny side up and sealed it with some watered down emulision
so far so good.

Maybe I have misunderstood - I hope not. Watered down emulsion is not gonna be much of a sealant against any water that might one day get under there. For your sake I hope it'll be ok, but if you have laid plywood on boards to avoid flexing, 3.6ml is not gonna be up to the task, especially without other products, such a bonding agent and/or stiffener.
Obviously I am not there, so can only judge from what is written.

[r1]

Maybe I have misunderstood - I hope not. Watered down emulsion is not gonna be much of a sealant against any water that might one day get under there. For your sake I hope it'll be ok, but if you have laid plywood on boards to avoid flexing, 3.6ml is not gonna be up to the task, especially without other products, such a bonding agent and/or stiffener.
Obviously I am not there, so can only judge from what is written.
[/quote]

hi
oh dear well its done now so we will have to see what happens.the floorboards are well supported and solid so i can hope.never laid tiles before couldnt go any thicker on the plywood without chopping lots of doors and i didnt fancy doing that.iam not a diy man but so far it looks good,will it last?only time will tell.

[twiglet]

This is what I would recommend using...

http://www.tilegiant.co.uk/tile-grout-adhesive/aquapanel/6mm-aqua-panel-tile-backer-board.html

[STMO123]

This is what I would recommend using...

http://www.tilegiant.co.uk/tile-grout-adhesive/aquapanel/6mm-aqua-panel-tile-backer-board.html

For a 5X4 room that would cost about £250

[OOMV6]

Maybe I have misunderstood - I hope not. Watered down emulsion is not gonna be much of a sealant against any water that might one day get under there. For your sake I hope it'll be ok, but if you have laid plywood on boards to avoid flexing, 3.6ml is not gonna be up to the task, especially without other products, such a bonding agent and/or stiffener.
Obviously I am not there, so can only judge from what is written.

hi
oh dear well its done now so we will have to see what happens.the floorboards are well supported and solid so i can hope.never laid tiles before couldnt go any thicker on the plywood without chopping lots of doors and i didnt fancy doing that.iam not a diy man but so far it looks good,will it last?only time will tell.
[/quote]

Fair play to you for having a go. That's great. As you say time will tell - it maybe that you incur absolutely no problems. What I would say, is maybe ask the questions on a forum such as this, do research etc some days prior to actually starting.
Anyway, as I said, good on ya.

[twiglet]

This is what I would recommend using...

http://www.tilegiant.co.uk/tile-grout-adhesive/aquapanel/6mm-aqua-panel-tile-backer-board.html

For a 5X4 room that would cost about £250

As the OP is tiling onto floorboards, I made the assumption that it's a bathroom he's doing.  Therefore, maybe 4-5 square metres max.  At the end of the day, you get what you pay for.  I've used this product, so can personally recommend it.