tanking - why?!

[ross lewiss]

those web sites are excellent, just found www.wedi.co.uk and theres loads of info on you tube if you type in wedi....got all the info about fixing today from that but it mainly echoed whats been said on here, really interesting stuff
thanks,ross

 

[wetdec]

Tanking is an essential part of a bathroom installation whether its for a shower, general bathroom or wetroom. Todays buildings being made like boxes that will turn to mush if you add water have seen to the importance of tanking.

In Europe its law and its on its way over here, if your honest who in his right mind would have accidental spillage of water over an electrical socket no one yet people happily put showers, wetrooms, free standing baths over kitchens etc. with no waterproof membrane.


If your doing a bathroom then tank the floor it litteraly takes an hour to do a good job and you know its safe, walls around. A bath shower can be done but go to the floor costs a few pennies more and its a solid job. Showers/wetrooms need the walls tanking 200/500mm outside the shower area and the floor below so say 5m2.

There are a few waterproof membranes to be had which are made for the job.

Membranes vary :

Tilebacker boards are ok but are generally more expensive than a really good membrane. Tilebacker (Wedi) 5m2 £140 + tapes

Paint on membrane (mapeigum) is there to be used but due to thickness variations when applying working conditions and differing ideas on how it should be used its not the most consistant of products. 5m2 coverage £35/45 + tapes

Tanking mat durabase is a system on a roll which is stuck to the walls with flexible adhesive so no paint brushes and seperate tubs required. Put it on like wall paper and it is an actual barrier between tiles and substrate. 5m2 £55

Tilesafe, the market leader pays for all its advertising by charging £175 for a 5m2 kit but like all others it has its place.



As a solution that is consistant and proven then Durabase or Kerdi ( no drying time, waterproof absolute) are the solutions the pro's should be using as they are the the undoubted way that this sector is going to go........ a sheet membrane system.



Not being unfair to any we sell them all at www.wetdecs.co.uk, if they arnt on the site then a simple email or call will get it sorted.

Hope this helps out a little

tiler

..

 

[sWe]

Let me put it like this:

In Sweden, it's been law to waterproof entire bathrooms and such, since the eighties. The standards have developed, and the rules have become more and more stringent. For about 13 years, roll on kits and joint tapes have been standard, but it's not enough it seems, because the insurance co's still pay up to the equivialent of £10m every week for water damaged properties, and that's in a country of about 9m people. Granted, the water damage claims are nothing now compared to what they were, but it's still a helluvalot of money.

 

[wetdec]

No reflextion on the fixers then lol


..

 

[sWe]

Of course there's alot of cheating and skimping, but that's only part of the problem. I'm not entirely sure what the english terminology is here, but the main causes of damage, in no particular order, are:

• Faulty installation of the waterproofing
• Insufficient vapor diffusion resistance in the waterproofing
• Insufficient waterproofing of punctures in the waterproofing made during or after fixing of tiles or sanitary wares
• Faulty installation of plumbing resulting in failiure and water leaks, often for an extended period of time

The first, third and fourth points are being addressed with increased training, and greater demands on tilers/plumbers who wish to qualify for a wetroom license (domestic bathrooms are classified as wetrooms over here), or a plumbing licence. The waterproofing/plumbing systems are also being modified accordingly.

The second point is being addressed through increased demands on the waterproofing manufacturers. Waterproofing needs to be both water and vapor diffusion proof now. This excludes almost all roll on systems, unless they used in combination with water and vapor diffusion proof membranes. The reason for this is that the water vapor which does get through the waterproofing, even very little, is likely to cause mold growth.

The use of gypsum based board materials isn't permitted in bathrooms any more. The use of wood based substrates has been prohibited for many years.

The materials needed to waterproof an average bathroom today, costs in the region of £400-500, compared to £200-300 just six months ago.

 

[sibs]

in response, as a professional tiler specialising in domestic work, i want to guarantee my customers that their shower enclosure wont leak, not that if or when it does there is damage limitation in place!
this is the point i have been driving at and no-one so far has convinced me otherwise!
if epoxy grout stops this, why not just use it?
also hardibacker boards are waterproof anyway.
ps i dont want to "sell" tanking i want to do the best tiling job possible.
i am happy to put the stuff on, god knows its not rocket science, i am just uncomfortable with the thought of water behind my tiles!
best regards, adam

A little note on epoxy grout....
Firstly it is mainly used in situations where cleanliness/ sterility is of the upmost importance such as commercial kitchens or hospitals.
Secondly it works out very expensive compared to cement based grouts.
Thirdly is is/can be almost impossible to remove from tiles if left on for too long
Fourthly its nasty stuff.... it carries a COSHH warning so if you do use it wear gloves and if it gets on your skin wash it off as soon as possible as it is very corrosive to the skin. I was told it can burn the flesh down to the bone.
Just so you are aware

 

[Gazzer]

A little note on epoxy grout....
Firstly it is mainly used in situations where cleanliness/ sterility is of the upmost importance such as commercial kitchens or hospitals.
Secondly it works out very expensive compared to cement based grouts.
Thirdly is is/can be almost impossible to remove from tiles if left on for too long
Fourthly its nasty stuff.... it carries a COSHH warning so if you do use it wear gloves and if it gets on your skin wash it off as soon as possible as it is very corrosive to the skin. I was told it can burn the flesh down to the bone.
Just so you are aware

I have an allergy to some epoxy grouts, my skin will turn red and in the worst case it will blister. Very painful indeed, it takes weeks to clear up. No good wearing gloves either as it makes no difference. It wasnt always the case though so i dont know what changed but after 3 cases of this happening to me i dont touch epoxy anymore.

 

[sibs]

I have an allergy to some epoxy grouts, my skin will turn red and in the worst case it will blister. Very painful indeed, it takes weeks to clear up. No good wearing gloves either as it makes no difference. It wasnt always the case though so i dont know what changed but after 3 cases of this happening to me i dont touch epoxy anymore.

Ouch!! SirRamic that sounds nasty. It really isn't pleasant stuff is it. Sounds like you have developed a sensitivity to it

 

[sWe]

Also remember that most epoxies emit toxic fumes which can cause nerve damage if you're exposed to it for long enough.

Wear. A. Proper. ****ing. Face. Mask. When. Using. Epoxy. Period.