tiling onto weyrock?

[tactile]

i know your not meant to tile directly on to weyrock, but can anyone tell me why?
its very sturdy, unlike floorboards.

i might have a job coming up which have weyrock floors , small and large.

any advise?
im sure some tilers must tile direct on to it.

cheers

[Dave]

You are advised not to tile to it becaue it is a partical board so its not structuraly very strong compared to plywood etc....but if it is solid as in no deflection then it can be tiled too( i don,t) ......
This is the product that is suitable to use for your job in hand......

BAL Fastflex Powder & Liquid

A two part, rapid-setting, sulphate-resistant, water-resistant and frost-resistant floor tile adhesive and isolating, anti-fracture underlay, suitable for use in interior and exterior locations. Suitable for fixing ceramic floor and porcelain tiles and mosaics (including fully vitrified), dark natural stone and slate. Suitable for use on tile backer boards, glazed tiles, concrete bases, cement:sand screeds, tongue & groove floorboarding, plywood overlay, floating plywood/chipboard floors, ceramic/quarry tile/terrazzo/hard natural stone bases, vinyl tiles/sheet, mastic asphalt, steel, glass reinforced polyester (GRP), steel and galvanised steel. Conforms to BS EN 12004, Type C, Class 1F.

Then grout with these....

BAL Wide Joint Grout

A water-resistant, frost-resistant cement-based powder grout designed for grouting ceramic floor tiles, mosaics, quarries etc. Also suitable for use on walls. Not recommended for soft glazed wall tiles, or tiles with metal decor or lustre. Suitable for use in interior and exterior locations in both wet and dry conditions. Suitable for swimming pools. Conforms to BS EN 13888, Type C, Class G1.

NOTE: The physical properties of BAL WIDE JOINT GROUT can be enhanced by the addition of BAL ADMIX GT1. The polymer admixture imparts flexibility, increases adhesion and reduces the water permeability thus widening the application possibilities of the grout, with a classification of BS EN 13888, Type C, Class G2.
BAL Admix GT1

A polymer additive for BAL cement-based grouts. Not for use with adhesives. The addition of BAL ADMIX GT1 greatly improves the physical properties and characteristics of the grout.

• Increased mechanical strength.
• Increased flexural strength and flexibility.
• Reduced water permeability.


Good luck and let us know how you get on......

p.s. i would still advise to over-ply or similar but its down to personal choice...

[tactile]

cheers for the advise. i pretty much use similar products anyway. topps tiles give you a lifetime guarantee if you use BAL everything on a job. as long as you've done it by the book of course.

i dont think i'll risk it on this job
but the next small weyrock bathroom or toilet floor i might!