How quick can I tile a new screed

[easyt]

I am doing a bathroom and lavatory refit. I will have to replace most of the floor screed in the toilet. An area of about 1m x 1.5m 25mm thick.

I will use a 4:1 mix

I expect similar problems in the bathroom and will repair screed and tile walls first leaving the bottom cut row until I can tile the floor.


How long do I need to wait before tiling the floor ?

Can I reduce the time using a fast set cement ?

 

[jay]

hi best to let it dry naturally 1mm needs 1 days drying if its 25mm thick give it 25 days why did the screed need replacing

 

[easyt]

Poor mix some 50 years ago. I had a similar problem 20 years ago when I was tiling sitting room. I suspect some areas were too dry. The area under the toilet seems OK. Some areas are a bit pitted and dusty where old thermoplastic tiles laid on a bitumen layer were removed. I will have to seal those areas somehow after replacing the screed to make the toilet accessible. I will do the screed late today so that the toilet is out of operation just overnight. (We have a caravan we can use).

Easy T

 

[easyt]

Don't really fancy having to leave it for 3 weeks.

 

[jay]

take it you use a slurry coat before screeding

 

[doug boardley]

I think mapei have brought out a green screed adhesive

 

[easyt]

Floor with part screed removed showing plastic sheet over concrete and remaining screed.

 

[easyt]

take it you use a slurry coat before screeding

I was just going to lay on plastic membrane. No slurry coat. pva the existing abutting edges and a little in the mix.

I am open to advice though.

 

[jay]

if you have a concrete base remove plastic to let screed to stick

dont repeat dont use pva find an acrylic primer dampen concrete slightly apply primer mixed with water (check directions) sprinkle neat cement on top mix together using stiff brush (slurry coat) then lay screed on top make sure slurry coat stays wet and this will help it to bond hope this helps :8:

 

[easyt]

Thanks for the advice Jay. As all the existing screeds are laid on a visqueen (SP?) layer over the concrete I assumed that this was to do with damproofing.

 

[jay]

Thanks for the advice Jay. As all the existing screeds are laid on a visqueen (SP?) layer over the concrete I assumed that this was to do with damproofing.

if you have any concerns with damp you can use a waterproofing over the top of the new screed contact wetdeck he knows his stuff hope this helps

 

[merlecollins]

Can I reduce the time using a fast set cement ?

Yes, use BAL Quickset Cement in place of OPC in your screed mix and you can be tiling in 24 hours

BAL Adhesives - Products - quickset cement

 

[JamesBrownLive]

if you have a concrete base remove plastic to let screed to stick

dont repeat dont use pva find an acrylic primer dampen concrete slightly apply primer mixed with water (check directions) sprinkle neat cement on top mix together using stiff brush (slurry coat) then lay screed on top make sure slurry coat stays wet and this will help it to bond hope this helps :8:

Do you always have to use a slurry coat on concrete before screeding, or is it just best practice/reccomended?
What are the likely consequences of not using a slurry coat?

Cheers

 

[Scott]

Wetdec has gone/is going on his hols

 

[pete f]

i use ultra slc tile over day after