How quick can I tile a new screed

[Houston]

about fortnight or Bal do an adhesive called Bal Green Screed which u can use 24hrs after laying ur new screed

 

[jay]

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

more chance your screed wont stick to substrate if you dont use slurry coat:8:

 

[Ajax123]

if you put in 4:1 sand cement screed at 25mm expect to be re laying it pretty soon. It is much too thin. If you are laying on an existing concrete or screed floor it needs to be 50mm minimum. If you are stuck with 25mm I would mix 3:1 and add SBR and polypropylene fibres. This would also dry significantly quicker as the SBR will reduce the water content and the water cement ratio will be lower meaning more of the water in the mix is used up by the cement hydration.

 

[easyt]

if you put in 4:1 sand cement screed at 25mm expect to be re laying it pretty soon. It is much too thin. If you are laying on an existing concrete or screed floor it needs to be 50mm minimum. If you are stuck with 25mm I would mix 3:1 and add SBR and polypropylene fibres. This would also dry significantly quicker as the SBR will reduce the water content and the water cement ratio will be lower meaning more of the water in the mix is used up by the cement hydration.

I know that it is too thin. Having said that there was no noticeable problem until I ripped up the thermoplastic tiles. The house is 55 years old. If the problem recurs in half that time it is unlikely to be my problem.:lol:

I think that I will keep the mix on the strong side. When they built the house they must have had poor control over the base concrete levels. Screed about 23mm in toilet - In bathroom about 45 - In sitting room it was over 50mm.

I will probably remove the plastic membrane from the failed area and bond the screed directly to the floor slab. In the adjoining bathroom there was no general problem. Screed has failed over existing pipes in a small 500mm x 75mm area. Cover to pipes is probably only 20mm.

 

[terrygrant]

Why not bed 20mm wedi type board onto the floor with adhesive then tile that the same day.

Every one is a winner :hurray:

Good luck

Terry
On The Tiles - Professional Tiling Service - High Quality Tiling London

 

[easyt]

:mad2: dohh. Thanks Good idea.

(Wish I hadn't just laid the screed).

 

[JamesBrownLive]

Why not bed 20mm wedi type board onto the floor with adhesive then tile that the same day.

Every one is a winner :hurray:

Good luck

Terry
On The Tiles - Professional Tiling Service - High Quality Tiling London

Do you still need to use an isolation membrane with Wedi boards? Or does the fact they have a styrofoam core provide that functionality?

Cheers

 

[terrygrant]

No membrane required. Wedi is dimensionally stable in all conditions excepting perhaps a house fire. Its quick and easy to fit, it allows you to level out a floor, it has great insulation properties.....I just whish I had developed it!

Terry
On The Tiles - Professional Tiling Service - High Quality Tiling London

 

[JamesBrownLive]

No membrane required. Wedi is dimensionally stable in all conditions excepting perhaps a house fire. Its quick and easy to fit, it allows you to level out a floor, it has great insulation properties.....I just whish I had developed it!

Terry
On The Tiles - Professional Tiling Service - High Quality Tiling London

In your professional opinion, how do you rate it next to Marmox?

Cheers