Discuss Bathroom tiling in the Bathroom Tiling Advice area at TilersForums.com.

U

Unregistered

I have a two fold question:
Is it stipulated in building regs that you have to use water resistant plasterboard in a bathroom?
If ordinary plasterboard is used, sealed correctly and tiled over with waterproof adhesive and grout, what is the proabability of water getting behind the tiles and damaging the plasterboard inside a shower enclosure? What time period would you expect this to happen over?
Thanks for your help.
 
M

MICK the Tiler

Very interesting debate on waterproofing issues my fellow members and for what it is worth down here waterproofing in wet areas is mandatory and you need a seperate license obtained through the B.S.A (Building Services Authority) to preform this task. Our code stats that a minimum of water penatration protection should include internal corners to a ht of 1.8m and joins extending into the recess the floor of shower cubicles that are to receive tiling and the perimeter walls on slab on ground. The entire floor if dwelling has habitable living space under. Also areas around wall perforations for vanities and toilets etc.

Once this has been done a certificate must be lodged to the BSA and council as well as the home owner. Failing to issue such certificate can negate the on selling of a property until the waterproofing criteria are met.

Waterproofing insurance claims are still one of the greatest causes wet area failures in the state of queensland and cost 100s of millions to rectify each year due to inadequate materials unsatisfactory installation unlicensed aplicators and corrupted council officials.

Waterproofing in the Uk should become mandatory IMHO even though the systems in place are not perfect down here. It still gives the home owner and contractor reasonable amounts of protection should things not go according to plan.
 
S

sibs

Thats a very interesting post there Mick....Fekin I agree with you 100%. Thats the reason why I didn't give a timescale for water ingress and just said "over a period of time" because there are all sorts of variables like that. SirRamic I could never divorce you! :winkiss:
Bloody hell poor guy only wanted to know what plasterboard to use :lol:
 
U

Unregistered

Thanks very much for all your input. The reason that I am posing this question is that after tiling onto sealed foil backed plasterboard in a bathroom, a building surveyor has informed me that I have used the incorrect plasterboard (that i should have used mositure resistant plasterboard) and that it all needs to come off and be replaced with the whole bathroom being re-tiled at my expense. I have found nothing to agree with his opinion as to mandatory use of moisture resistant plasterboard and a property developer informs me that he does not use any specialist plasterboard on any of his developments. Who is right? And where can I find a definitive answer?
 
G

grumpygrouter

Maybe the best thing you can do is ask the surveyor to point you in the direction of the regulations backing up his assertion. It is possible that regulations local to your area stipulate the type of materials to be used. Only a guess mind!

Maybe you could go to your local library and see if they have a copy of the building regs. This may give you an idea.

Grumpy
 
S

sWe

Argh, I just wrote a post, but I didn't notice I wasn't logged on... Could a moderator please remove the unregistered version of my post? Here comes the same post again, but while logged in :)

Very interesting debate on waterproofing issues my fellow members and for what it is worth down here waterproofing in wet areas is mandatory and you need a seperate license obtained through the B.S.A (Building Services Authority) to preform this task. Our code stats that a minimum of water penatration protection should include internal corners to a ht of 1.8m and joins extending into the recess the floor of shower cubicles that are to receive tiling and the perimeter walls on slab on ground. The entire floor if dwelling has habitable living space under. Also areas around wall perforations for vanities and toilets etc.

Once this has been done a certificate must be lodged to the BSA and council as well as the home owner. Failing to issue such certificate can negate the on selling of a property until the waterproofing criteria are met.

Waterproofing insurance claims are still one of the greatest causes wet area failures in the state of queensland and cost 100s of millions to rectify each year due to inadequate materials unsatisfactory installation unlicensed aplicators and corrupted council officials.

Waterproofing in the Uk should become mandatory IMHO even though the systems in place are not perfect down here. It still gives the home owner and contractor reasonable amounts of protection should things not go according to plan.


We've got a similar system in Sweden, where you have to get a licence from a central authority. The rules and regulations on water proofing, substrates, and the pure technical aspects of tiling, are pretty strict over here. There's seldom any doubt on how to apply the rules, as they leave little room for interpretation. The rules apply nationwide, and state clearly what's allowed and what's not. You very liable if you haven't followed the regulations and something goes wrong, and surveyors can ask you to redo everything if they deem it necessary, though you can demand a second opinion. On the other hand, if you do follow the regs, you're pretty much covered if something goes awry, as the licence comes with a mandatory insurance.

Regarding substrates: It's mandatory to waterproof pretty much everywhere you can access water through anything more than a single faucet. It's verboten to use plasterboard with cellulose based "skin" in wetrooms (bathrooms are classified as wet rooms over here). That's because if the skin is subjected to even a little moisture, black mold starts growing on it pretty fast, as it feeds off damp cellulose.

Approved substrates in wetrooms include a few select board materials, such as fiber cement boards with pre-applied waterproofing, plaster boards with plastic "skin", or fiber-reinforced polystyrene boards, or solid materials, such as concrete. You always have to seal any and all joints, around pipes etc, no matter what, and any surface which isn't water proof on it's own needs to proofed, except in a few very specific cases.

A problem with most waterproofing systems is that while they don't allow water through, they do allow some steam through. As a result of that, new regulations kicked in 1st of January this year, which make it mandatory for all waterproofing systems to have a certain level of steam resistance. The currently approved systems tend to involve epoxy, water and steam proof membranes, or special fiber cement boards with pre-applied water- and steam proof coating, where you just have to proof the joints.
 
Last edited by a moderator:
W

wivers

If you hear a cricket chirping and you have a watch, you can estimate the temperature where the cricket is. If you can hear more than one, you can tell whether they are experiencing different temperatures. To calculate the "cricket temperature," count the number of chirps in a 14-second period. Add forty to the result, and you have a rough estimate of the Fahrenheit temperature of the cricket.

Well everyone else was talking all grown up so i thought i'd try!
 
S

SnipSnap

Maybe the customers need to see what it could happen if plasterboard are used and no tanking or waterproof membrane is not used.

Also if they are not prepared to pay more for allowing grouting on the next day.
 

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