First time laying Hardie on Saturday

[Time's Ran Out]

I find it very unnerving that 2 minute tilers can pass such scathing comments on products that they have never used and have no knowledge that the method of installation has been completed correctly!
I have used Impey products for over 8 years and have never been called back to any wet room construction undertaken.
My advice to the OP would be to read all manufacturers instructions prior to purchase and not rely on opinions from 'tilers' with no experience!

 

[Sean Kelly]

To make life easier use an impact driver to drive in the screws.
To make life cheaper use Reisser screws from Toolstation http://www.toolstation.com/shop/Screws+Fixings//Reisser+Cutter+Screw+40+x+25mm/d/sd/p95628
Stagger the boards like brickbond.
Cut the boards with a Hardiebacker carbon tipped blade (about £7).

Once the boards are glued and screwed you can tile straight away.

 

[jonnyc]

hi bud, I wouldn't of commented without knowledge. I will deffinately try to find out what system has been used. all i know is an impey system has been used throughout all of the building sites i currently am working on and it has not gone well, 12 months down the line they are all failing and it is not down to installation. and very recently a wetroom repair that had previously been repaired they tried to strengthen underneath the tray for a second time and once my big backside stood on top was bouncing (i could even see it moving let alone the guy with his eye against the ground)... its costing thousands per property as it is all mosaic stone too!

i don't have spec in front of me but my basic understanding is that the trays need to be solid bedded in first instance before tanking applied. Done plenty of these wet dec impey systems and only problem seems to be if tray not solid bedded.
yes they are pigs to do but do work if manufacture instruction followed.
ash please explain why there are problems even though manufacture instructions followed.

 

[mache]

To make life easier use an impact driver to drive in the screws.
To make life cheaper use Reisser screws from Toolstation http://www.toolstation.com/shop/Screws+Fixings//Reisser+Cutter+Screw+40+x+25mm/d/sd/p95628
Stagger the boards like brickbond.
Cut the boards with a Hardiebacker carbon tipped blade (about £7).

Once the boards are glued and screwed you can tile straight away.

Impact Driver - Check, brilliant tools
Screws, - Already got the Turbogolds after a few recommendations, but had seen Reisser and Spax mentioned in the past. Thanks for the input though.
Hardie score and snap blade - I've been robbed !!!! paid £9 for mine...

 

[prceramics]

The hardie knife is quite good it took me about a year to buy one was always using Stanley knifes I never use there screws I get the turbo gold 25mm from screwfix , hardie is a nightmare stuff to cut if you just need a bit off, usually use the grinder outside with a mask

 

[mache]

hi bud, I wouldn't of commented without knowledge. I will deffinately try to find out what system has been used. all i know is an impey system has been used throughout all of the building sites i currently am working on and it has not gone well, 12 months down the line they are all failing and it is not down to installation. and very recently a wetroom repair that had previously been repaired they tried to strengthen underneath the tray for a second time and once my big backside stood on top was bouncing (i could even see it moving let alone the guy with his eye against the ground)... its costing thousands per property as it is all mosaic stone too!

Don't get me wrong, not doubting what you found, but would be interested to hear more about what was installed if you can find out. e.g. if the trays were the older flat bottom or the matrix ribbed versions. Membrane identification should be fairly easy as it will be the bitumen based tilesafe or the waterguard co polymer. Any word on site with regard response from Impey on reason for failure? sounds like a site of this size the first port of call would be to get the manufacturers in for investigation. Please do post what information you find as I am interested.

 

[Mr Tiler]

Don't get me wrong, not doubting what you found, but would be interested to hear more about what was installed if you can find out. e.g. if the trays were the older flat bottom or the matrix ribbed versions. Membrane identification should be fairly easy as it will be the bitumen based tilesafe or the waterguard co polymer. Any word on site with regard response from Impey on reason for failure? sounds like a site of this size the first port of call would be to get the manufacturers in for investigation. Please do post what information you find as I am interested.

well as you stated yourself mate it will be bitumen based as already stated you cant use Silicon in any areas which is ridiculous and should be unheard of, as for the rest I can not comment but will by the end of next week when I have a chat with the gaffa. main reason for failure is both tanking membrane and tray.... the tray after a unreal amount of strength was still bouncing and the tanking system was failing... even once pulling up the bitumen we found that it was damp underneath so what does that say? and that specific room hadn't been used in a week or so

 

[Bathfix Bob]

When screwing down the Hardiebacker.....I find myself putting more screws round the edges than are needed at around 100mm centres.

Does anyone else do this for added piece of mind or am I wasting screws?

 

[TJ Smiler]

If you are having underfloor heating why not use insulation boards rather than Hardie, same price but much easier to cut and designed for UF................Or have i missed something on this thread?

 

[Qwerty]

If you are having underfloor heating why not use insulation boards rather than Hardie, same price but much easier to cut and designed for UF................Or have i missed something on this thread?

You are quite right, I thought the same.

 

[Andy Allen]

same here, would be using 10mm marmox boards myself..