Mould resistant bathroom tile grout?

Bogof_Babe

We had our bathroom walls re-tiled a year last March, and there is still not one speck of discolouration on the grout. However some small tiling jobs that OH has done himself over the years, with DIY chainstore grout, have only lasted a few months before they start to look dingy, with patches of black mould. We always religiously ventilate the room and wipe the tiles etc. down after use.

So, can anyone recommend a grout that the public can buy that would be of superior mould-resistant quality? We have another job pending and would like to get it right!

Grenage

I have no idea if the mould resistance of different grouts varies, but you could try bleaching it white, and applying some grout sealant.

I've never used grout sealant, but you'd have to assume it would assist in reducing water absorption and therefore mould growth.

penguingirl

Don't have a suggestion for supplies, but I've cleaned grout with a bicarb of soda and thick bleach paste as recommended on here. Mix them together and apply with a paintbrush. Leave overnight and rinse off. Some recommended scrubbing with a toothbrush, but we didn't find it needed it. Grout looked brand new afterwards.

[Deleted User]

Based on my experience of shower curtains, I think bleach will have limited effect. Starting with blue curtains covered in black mould, after a week of soaking in a bucket of bleach I ended up with white curtains and pink mould.

Bogof_Babe

Shower curtains are a different thing altogether. They are cheap and can be replaced regularly. Re-tiling the bathroom is another matter!

Thanks everyone. I guess the type of wonderful grout that our professional tiler used is a trade secret then .

lg13mza

We recently used an mould preventing additive for paint that can also be used in grout. That was 9 months ago and all is still well. Not particularly cheap if are painting/grouting a large area but better than having to re-do it.

[Deleted User]

Bogof_Babe wrote: »

Shower curtains are a different thing altogether.

It's the same mould though.

andyhop

Mapei Ultracolour grout

penguingirl

jack_pott wrote: »

It's the same mould though.

Yes, but it is easier to clean off some areas than others. I've not tried shower curtains but the bicarb/bleach combo worked brilliantly on grout, but was useless on silicone/sealant.

Polly05

Yeah, I've heard that the mapei stuff is good. I'm planning on using that soon. Also, you can buy LTP grout seal stuff that I'm planning on doing too...

MX5huggy

To grout use BAL microflex with microban, Topps Tiles stock BAL products.Use Dow Corning 785 silicone sealer Screwfix stock this. To clean mould use HG bathroom mould spray.