Help required for travertine issues

[shoncrr]

I am dea[FONT=Arial, Helvetica, sans-serif]rly hoping that with you[/FONT][FONT=Arial, Helvetica, sans-serif]r expe[/FONT][FONT=Arial, Helvetica, sans-serif]rtise you may be able to help me with my p[/FONT][FONT=Arial, Helvetica, sans-serif]roblems. I have t[/FONT][FONT=Arial, Helvetica, sans-serif]ried to do as much [/FONT][FONT=Arial, Helvetica, sans-serif]research as I can but I have become stuck. I will t[/FONT][FONT=Arial, Helvetica, sans-serif]ry and provide as much info as I think you may need.[/FONT][FONT=Arial, Helvetica, sans-serif] I have a wall and a floo[/FONT][FONT=Arial, Helvetica, sans-serif]r issue.
My conce[/FONT][FONT=Arial, Helvetica, sans-serif]rns mainly su[/FONT][FONT=Arial, Helvetica, sans-serif]r[/FONT][FONT=Arial, Helvetica, sans-serif]round the weight of my p[/FONT][FONT=Arial, Helvetica, sans-serif]roduct and I want to make su[/FONT][FONT=Arial, Helvetica, sans-serif]re I have p[/FONT][FONT=Arial, Helvetica, sans-serif]repa[/FONT][FONT=Arial, Helvetica, sans-serif]red as best as possible befo[/FONT][FONT=Arial, Helvetica, sans-serif]re I sta[/FONT][FONT=Arial, Helvetica, sans-serif]rt.
I plan to tile the wall and floo[/FONT][FONT=Arial, Helvetica, sans-serif]r of a bath[/FONT][FONT=Arial, Helvetica, sans-serif]room with filled and honed t[/FONT][FONT=Arial, Helvetica, sans-serif]rave[/FONT][FONT=Arial, Helvetica, sans-serif]rtine 30.5 x 45.7cm tiles. The weight of which is app[/FONT][FONT=Arial, Helvetica, sans-serif]r[/FONT][FONT=Arial, Helvetica, sans-serif]ox 31kg pe[/FONT][FONT=Arial, Helvetica, sans-serif]r squa[/FONT][FONT=Arial, Helvetica, sans-serif]re[/FONT] met[FONT=Arial, Helvetica, sans-serif]re.[/FONT]
I also plan to install wa[FONT=Arial, Helvetica, sans-serif]rmup unde[/FONT][FONT=Arial, Helvetica, sans-serif]rfloo[/FONT][FONT=Arial, Helvetica, sans-serif]r heating mats and wa[/FONT][FONT=Arial, Helvetica, sans-serif]rmup insulation boa[/FONT][FONT=Arial, Helvetica, sans-serif]rds.[/FONT]
[FONT=Arial, Helvetica, sans-serif]The existing walls we[/FONT][FONT=Arial, Helvetica, sans-serif]re laff and plaste[/FONT][FONT=Arial, Helvetica, sans-serif]r and bad a[/FONT][FONT=Arial, Helvetica, sans-serif]reas have [/FONT][FONT=Arial, Helvetica, sans-serif]recently been st[/FONT][FONT=Arial, Helvetica, sans-serif]ripped and [/FONT][FONT=Arial, Helvetica, sans-serif]replaced with plaste[/FONT][FONT=Arial, Helvetica, sans-serif]rboa[/FONT][FONT=Arial, Helvetica, sans-serif]rd and skimmed. The floo[/FONT][FONT=Arial, Helvetica, sans-serif]r at p[/FONT][FONT=Arial, Helvetica, sans-serif]resent has floo[/FONT][FONT=Arial, Helvetica, sans-serif]rboa[/FONT][FONT=Arial, Helvetica, sans-serif]rds - quite uneven- house is ove[/FONT][FONT=Arial, Helvetica, sans-serif]r 150 yea[/FONT][FONT=Arial, Helvetica, sans-serif]rs old.
My fi[/FONT][FONT=Arial, Helvetica, sans-serif]rst step was to sou[/FONT][FONT=Arial, Helvetica, sans-serif]rce adhesive p[/FONT][FONT=Arial, Helvetica, sans-serif]roducts etc.
I decided on BAL and sought advice f[/FONT][FONT=Arial, Helvetica, sans-serif]rom BAL [/FONT][FONT=Arial, Helvetica, sans-serif]re which p[/FONT][FONT=Arial, Helvetica, sans-serif]roducts to use- I have chosen
BAL [/FONT][FONT=Arial, Helvetica, sans-serif]rapid set flexible adhesive white- walls
BAL PTB flexible white adhesive-floo[/FONT][FONT=Arial, Helvetica, sans-serif]rs
BAL p[/FONT][FONT=Arial, Helvetica, sans-serif]rime[/FONT][FONT=Arial, Helvetica, sans-serif]r APD
BAL supe[/FONT][FONT=Arial, Helvetica, sans-serif]rflex wide joint g[/FONT][FONT=Arial, Helvetica, sans-serif]rout floo[/FONT][FONT=Arial, Helvetica, sans-serif]r
BAL mic[/FONT][FONT=Arial, Helvetica, sans-serif]ro flex [/FONT]g[FONT=Arial, Helvetica, sans-serif]rout wall
P[/FONT][FONT=Arial, Helvetica, sans-serif]rotect- T[/FONT][FONT=Arial, Helvetica, sans-serif]rave[/FONT][FONT=Arial, Helvetica, sans-serif]rtine p[/FONT][FONT=Arial, Helvetica, sans-serif]rotecto[/FONT][FONT=Arial, Helvetica, sans-serif]r- to seal tiles.[/FONT]
[FONT=Arial, Helvetica, sans-serif]
I have been advised that a plaste[/FONT][FONT=Arial, Helvetica, sans-serif]rboa[/FONT][FONT=Arial, Helvetica, sans-serif]rd wall can take 32kg pe[/FONT][FONT=Arial, Helvetica, sans-serif]r sq met[/FONT][FONT=Arial, Helvetica, sans-serif]re and a skimmed plaste[/FONT][FONT=Arial, Helvetica, sans-serif]rboa[/FONT][FONT=Arial, Helvetica, sans-serif]rd wall can only take 20kg. Also that I should allow 3kg pe[/FONT][FONT=Arial, Helvetica, sans-serif]r squa[/FONT][FONT=Arial, Helvetica, sans-serif]re met[/FONT][FONT=Arial, Helvetica, sans-serif]re fo[/FONT][FONT=Arial, Helvetica, sans-serif]r adhesive. [/FONT][FONT=Arial, Helvetica, sans-serif] As my weight fo[/FONT][FONT=Arial, Helvetica, sans-serif]r the walls [/FONT][FONT=Arial, Helvetica, sans-serif]is app[/FONT][FONT=Arial, Helvetica, sans-serif]rox 34kg and the a[/FONT][FONT=Arial, Helvetica, sans-serif]rea has [/FONT][FONT=Arial, Helvetica, sans-serif]recently been skimmed then I am conside[/FONT][FONT=Arial, Helvetica, sans-serif]ring 6mm ha[/FONT][FONT=Arial, Helvetica, sans-serif]rdie backe[/FONT][FONT=Arial, Helvetica, sans-serif]r. [/FONT][FONT=Arial, Helvetica, sans-serif]I plan to lay exte[/FONT][FONT=Arial, Helvetica, sans-serif]rio[/FONT][FONT=Arial, Helvetica, sans-serif]r plywood of 18 mm on floo[/FONT][FONT=Arial, Helvetica, sans-serif]r[/FONT][FONT=Arial, Helvetica, sans-serif].[/FONT][FONT=Arial, Helvetica, sans-serif]My floo[/FONT][FONT=Arial, Helvetica, sans-serif]r[/FONT][FONT=Arial, Helvetica, sans-serif] joists a[/FONT][FONT=Arial, Helvetica, sans-serif]re app[/FONT][FONT=Arial, Helvetica, sans-serif]rox 17 inches apart[/FONT][FONT=Arial, Helvetica, sans-serif].

Now fo[/FONT][FONT=Arial, Helvetica, sans-serif]r all my questions-
1- Should I seal tiles once befo[/FONT][FONT=Arial, Helvetica, sans-serif]re putting up and then once befo[/FONT][FONT=Arial, Helvetica, sans-serif]re g[/FONT][FONT=Arial, Helvetica, sans-serif]rout and then once afte[/FONT][FONT=Arial, Helvetica, sans-serif]r g[/FONT][FONT=Arial, Helvetica, sans-serif]rout?
2-Will I be fine with a a single sheet of 18mm plywood and the PTB adhesive fo[/FONT]r the floor?
[FONT=Arial, Helvetica, sans-serif]3-Will I be fine with the 6mm ha[/FONT][FONT=Arial, Helvetica, sans-serif]rdiebacke[/FONT][FONT=Arial, Helvetica, sans-serif]r [/FONT]
4-i have anothe[FONT=Arial, Helvetica, sans-serif]r [/FONT][FONT=Arial, Helvetica, sans-serif]room to do and I plan to strip all old plaste[/FONT][FONT=Arial, Helvetica, sans-serif]r etc and put up new plaste[/FONT][FONT=Arial, Helvetica, sans-serif]rboa[/FONT][FONT=Arial, Helvetica, sans-serif]rd and not skim- will I get away with tiling 34kg pe[/FONT][FONT=Arial, Helvetica, sans-serif]r sq met[/FONT][FONT=Arial, Helvetica, sans-serif]re di[/FONT][FONT=Arial, Helvetica, sans-serif]rectly to the plaste[/FONT][FONT=Arial, Helvetica, sans-serif]rboa[/FONT][FONT=Arial, Helvetica, sans-serif]rd[/FONT]?
5-Is the[FONT=Arial, Helvetica, sans-serif]re anything else I should conside[/FONT][FONT=Arial, Helvetica, sans-serif]r?

many many thanks.
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[ohhnoo]

:welcome:Not a tiling expert but I have recently completed a travertine bathroom so can help with some of your queries.
I was advised to seal tiles once fitted then again after grouting, dont know about the bal product but I used LTP mattstone which came highly recommended on here.
As for the floor I used 18mm marine ply to replace the floorboards but added loads of extra noggins to make my floor solid, I then fitted a decoupling membrane.
I used moisture resistant plasterboard,unskimmed for the walls which was screwed to the stud wall and dot and dabbed everywhere else ,like you say the weight of travertine plus adhesive and grout takes it to the max weight limit but mine seems fine.
If your using the hardi backer boards not sure if you need to waterproof the wet areas, Im sure someone will be along shortly to advise. I used the homelux wall membrane around the shower,bath and sink.
Hope this helps.

 

[hillhead]

I wouldn't be using the rapid set on the walls unless your experienced and speedy!
Your skimmed walls won't stand up to the weight issues.
moisture resistant plasterboard would do walls no prob unskimmed.
Seal before grouting,grout when sealer is well impregnated then reseal only after grout has throughly dried ie 24 hours or more.

 

[Rich]

I would forget about the PTB to be honest, Id lay the heat mats then use a leveling compound over the top and tile using normal adhesive. PTB isnt the easiest adhesive to use if your not very experienced and it is also rapid setting. Id agree with Hillhead, avoid rapid setting products, go for standard setting and take your time to make a good job of it.

If you can add extra noggins to the joists, do it. Then a sheet of 18mm BWP ply is fine.

As the guys have said above, fix the tiles (work clean and wash off any adhesive with a clean sponge and water), seal, leave to dry, grout, leave to dry and seal again. You must make sure that you wash ALL the grout off before sealing a second time.

Hope this helps a little bit