Low screed - advice please?

[amsie]

Hi all, Tiler by trade.

Having a home extension done and a plasterer friend of mine kindly offered to do my screed for me. However, he has somehow managed to do it 20mm out of level. Starting off 20mm too low from the mark sloping over 3.5m to 40mm too low. Room length is 5m. Im gobsmacked to say the least and I could have done a better job myself!!!! However, its obviously left me with a problem screed.

Some of the options put to me have been take it all out and start again or SBR slurry/SBR screed with fibres into it, either grinding the floor or scabbling it. I've also been told this might not work???.

SLC by my calculation would prove very expensive.

I would really appreciate some advice and options please. Id rather not take the whole lot up unless it really has to come out.

Thanks in advance

Paul

 

[Ian]

SLC seems the obvious solution and surely would be cheaper than ripping out and starting again. How long has the screed been down? Is it dry yet?

 

[peteablard]

You can get bags of chippings for £5/£6 per 25kg bag which you could bulk it up with, much cheaper that doing the whole lot with just SLC. Just make sure you choose SLC that will go to that depth as not all will.

 

[Ajax123]

If you could squeeze it up to minimum 25mm you could use a sureflo bagged screed bonded. You would need to SBR and sand broadcast over the existing screed to provide a good mechanical key. I suspect it would be considerably cheaper than using a self levelling compound.

It is too thin to put in a traditional screed even with fibres in.

Sureflo is GYPSOL self compacting anhydrite screed in bags available from CCF. You can mix it and install it yourself. If you need a contact for who to speak to send me a private message and I will be happy to help.

otherwise you are pretty much left with self levelling compounds at the depth in question.

 

[White Room]

Could try this Ronafix for Screeds

 

[amsie]

Thanks for the advice. Screed is getting on for 4 weeks old now. Just considering the options vs cost atm