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Tanking a bathroom. Is it worth it?
Hello. We live in a first floor flat and have a bathroom wall (length of standard bath) and a shower wall (width of standard bath) that is in need of tiling. We have previously used damp proof/bathroom paint on the bathroom walls however there is a small leak from either the gaps in the border tiles or through the plaster on the wall. This is why the area needs tiling. Once tiled the whole are will need to be properly sealed.
I was wondering if there any way to seal the floorboards under the bath/the walls around the shower & bathto prevent any water penetrating through?.
I have seen that we may be able to use a tanking system prior to tiling.
How effective is this and how much will this affect the cost?.
- Ystevejv 21st Apr, 2012 Bathroom Fitting
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If you already have a leak that has penetrated the plaster I would strongly advise replacing the plaster as it is now damp and will start to crack and eventually turn mouldy. I would strongly recommend using a tile board such as hardie backer or aqua panel instead of plaster board as these are cement based boards and are therefore waterproof, mould proof and rot proof!! My local topps tiles has had an off-cut of these boards in a water tank for the last 7 years and it is in the same condition as the day it went in! These boards maybe more expensive than plaster board approx £9.50 each however you will not need to plaster them as they are ready to tile straight onto. Just remember to prime both sides of the boards first with either an acrylic or latex primer & fibre tape ALL joints and corners.
As far as tanking goes it isn't always necessary as it's predominantley used in wet rooms however it all really depends on how much you wish to safeguard your room. I would use it in every room exposed to moisture but that's just me as I prefer peace of mind and I've never had any comeback's after fitting tanking in a property. Its reasonably inexpensive at approx £60 and really easy to diy if you wanted to. Just mix the 2 components and roller it onto the areas necessary. One kit will cover approx 8m2 and 2 coats are required which can take as little as 4 hours to complete and your ready to tile. Ardex, weber and Bal all provide really good tanking kits and they can all be found at your local CTD showroom (ceramic tile distributors). All in all its probably a days work for a tiler and its always worth checking if he/she has an account with a local tile merchants as like myself I can get materials 30% cheaper than those without. Worth thinking about ;-)
Please bare in mind that if any of the stages are completed inadequatley then all your efforts of waterproofing will pretty much be null and void and that could prove to be very costly indeed!
I hope that this has helped you in making a desicion. Good luck with your project.
Adam Summers - Adsumm Tiles
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