for the sake of a couple of spf's and an hours work just stick them down, why chance it ?
Discuss Hardibacker laid with no adhesive. in the UK Tiling Forum area at TilersForums.com.
It's 12sqm onto chipboard. The only addy to use is Fastflex @ £80 for 3sqm coverage (maybe a little bit more coverage with a 6mm trowel under the Hardibacker). Anyway, the customer is paying full retail for this adhesive as it's a Topps approved fitting job. Basically I have told them they will have to purchase 8 'portions' of Fastflex @ £80 a portion! plus 13 boards of Hardibacker @ £12.49 a board. Plus all the materials for 2 more rooms. The job is guaranteed by Topps for 1 year. I have done all my research and if they choose to ignore my advice about addy under the Hardibacker I am getting that in writing. However, the Hardibacker rep has spoken to Topps manager and agreed that it is ok to lay the Hardibacker straight onto the floor if it's level enough. Again, I have asked for this in writing. At the end of the day this job is worth over £700 to me, plus if there is any comeback then it's Topps that has to sort it out.for the sake of a couple of spf's and an hours work just stick them down, why chance it ?
You can if it just to fill the voids! You can then use the fastflex (oh the joys!) to stick the tiles to the Hardie. If ti was me, and they were spec-ing dry lay Hardie I wouldn't do the job. I haven't yet seen a sheet of 6mm hardie that is "flat"!100% agree with you about filling the voids, but it's the interaction between SPF and the chipboard that is an issue. I can't use SPF on chipboard. You are also right about the number of cooks. Not looking forward to this job. The customers are taking time off work and I feel they will be checking my every move! Cheers for advice. Sean
You can if it just to fill the voids! You can then use the fastflex (oh the joys!) to stick the tiles to the Hardie. If ti was me, and they were spec-ing dry lay Hardie I wouldn't do the job. I haven't yet seen a sheet of 6mm hardie that is "flat"!
....... plus 13 boards of Hardibacker @ £12.49 a board.
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