Tiling on Floorboards

[Tilestiles]

Hi Chaps. Got a bathroom floor to do tiling on floorboards. I understand it needs to be boarded out but customer doesnt want the height raising too much. Was thinking of using the hardibacker (6mm) boards but never used them before. Can anyone please give me some advice on how to fit. I believe they should be stuck and screwed at 150mm intervaks. the advice I am after is what adhesive to use to stick the boards?? Will SPF be OK?? Is it applied in dot and dab fashion when sticking these boards or combed on as you would do with a floor?? Anyadvice greatly appreciated.

[Turkish]

If they`re solidly fixed couldn`t you use fastflex straight on them?

Turkish

[wetdec]

Are they propper 6x3/4 inch softwood boards. How big a room


tiler

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[ad tiling]

if theres a topps near you get a leaflet on hardibacker , straight forward to cut and lay.

[Tilestiles]

Was thinking of going direct with Ardex 7001 after primimg but floorbirads are quite old and quite a bit of movement in them so not too sturdy. However, it is only a small area to be tiled of approx 3 square metres in total

[wetdec]

Screw the existing boards down till sound, lay 6mm ply over them nailing as you say 150 centres. Any reputable flexible. On that area no problem m8

tiler

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[GazTech]

Screw the existing boards down till sound, lay 6mm ply over them nailing as you say 150 centres. Any reputable flexible. On that area no problem m8

tiler

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If you prepare this way, Bal will only recommend Fastflex and wide joint grout with GT1 added. If you can get the boards stable, go directly with fastflex on such small area, but still add GT1 to your grout ......Gaz

[wetdec]

Well I said

Any reputable flexible

so bal will do I guess

[Dave]

And if you are overboarding then i would recommend using screws not nails....

[bearwithme]

tiles, if you use no more ply instead the stockist should have in the adhesive as well as screws. locally its, £10 per board, £5 box of screws and £8 for a tube of their adhesive.

[GazTech]

Well I said so bal will do I guess

Sorry tiler I didn't want people confused with single or rapid set flexible, and two part flexible.....these have different preparations and applications.
BAL Single Part Flexible this requires 18mm overply onto T&G boards.

BAL Fastflex Powder & Liquid two part flexible does not.........Gaz

[wetdec]

Gentlemen

He only has 3m2 to do dont get the poor fella paranoid and skint, I know Gaz Dave your all talking data sheets etc which is cool but by the time he gets all his stuff in the room he will need to sit outside init.

Hey Gaz ... no prob mate


tiler

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[GazTech]

Gentlemen

He only has 3m2 to do dont get the poor fella paranoid and skint, I know Gaz Dave your all talking data sheets etc which is cool but by the time he gets all his stuff in the room he will need to sit outside init.

Hey Gaz ... no prob mate


tiler

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If you deduct plywood, labour to fit plywood, screws to fix, primer for the rear and edges of the boards, travel to get the plywood & time, it works out cheaper to go directly onto secured boards with 2 part flexi. Working for Bal as you know I do, I have an obligation to people on the forums to state how incorrect procedure (in preparation and application) of our products can affect their lifetime guarantee.....I don't mean to offend....Gaz

[wetdec]

Hey chill I fully realise your obligation as you are a Bal man you dont offend me I would be the same with wetrooms

tiler

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[Tilestiles]

Thanks guys for all your help and advice once again. Main reason for this question was how to fix the hardi-backer (ie. what adhesive and how it should be applied) as this is the way I was going to go with it. I know 2 other tilers have viewed the job and given estimates and both of them redcommended boarding it out as I did. However, I have got the job over the other 2 guys (even tho price was more) as I showed them pics of my work and the others didnt (Maybe a tip for others!!). So please, can anyone just advise me on what adhesive should be used to fix the hardibacker and how the adhesive should be applied. Cheers!!

[GazTech]

What thickness of backerboard ?

[Tilestiles]

6mm Gaz

[GazTech]

Screw the backer down at 200mm centres, pilot drill the holes in board first before screwing. 10mm is required thickness for standard flexi addy, so again I recommend 2 part flex....GT1 added to grout....Gaz