UFH screed sanding back

[Lesgrandepotato]

Due to a minor miscommunication.. aka I forgot to book it... the floor is being sanded back on Monday to take the top 5-10mm off ready for tiling etc. The house is fully open plan with no doors at the moment and stuff generally stacked around. Is this a relatively tidy operation or an oh shit get the house dust proofed sort of operation? We have painted walls and light fitted so I don't really want tonnes of dust everywhere. 

 

I leaning towards assuming the magic machine has extraction built in and it'll be fine. 

 

Am I a raging eejit?

[IanR]

Really messy. 

 

I've not seen floor grinders with extraction, only the small hand grinders they'll use for the edges.

 

The dust seems to come off electrically charged and sticks to painted walls surprisingly well. 

 

5-10mm grinding is a a lot. Is there not a way around it? 

[Lesgrandepotato]

It's to take the watery crust of the top of the screed from when it settled down. It was a 40mm fibre screed and it goes in a like a custard or soup consistency. 

 

5-10mm may be my misunderstanding! 

 

I'll get the rooms not involved sheeted off and get a soft broom for the rest! 

[Nickfromwales]

Are we talking liquid screed?

40mm screed with 10 off = 30mm left = not good. Should be 3-5mm off max?

[Lesgrandepotato]

Suspect it's my misunderstanding. Looks super flat to me. But apparently the top bit is a crust and needs to come off.

 

will get sheeted up this afternoon!

 

 

[Lesgrandepotato]

Cheers gents - I've sheeted all over the place 

[Grosey]

5 hours ago, Lesgrandepotato said:

Cheers gents - I've sheeted all over the place 

 

I believe the correct verb is Shat...

 

[Lesgrandepotato]

57 minutes ago, Grosey said:

 

I believe the correct verb is Shat...

 

To be fair the site bog has a hint of trainspotting about it. 

[Lesgrandepotato]

So I've popped in today, sanded back site immaculate and no sign of dust. What witchcraft is this!?! Still jobs been done dropped can of paint clearly has been sanded out!

[Roundtuit]

Interesting. I need to get about 150 sq m done in the near future. How big a job is it? One man with a floor sander for a couple of hours, or something more complicated?

[PeterW]

Any indication on price per M²   ??

[Lesgrandepotato]

On 21/08/2017 at 22:48, Roundtuit said:

Interesting. I need to get about 150 sq m done in the near future. How big a job is it? One man with a floor sander for a couple of hours, or something more complicated?

 

Couple of lads for a couple of hours. There were doing three jobs a day. That was 110sqm done. 

[Lesgrandepotato]

23 hours ago, PeterW said:

Any indication on price per M²   ??

Approximately £1.10. 110sqm or so. £125 

[PeterW]

Que..??!! 

 

What did they use ..??! Have they taken a fair bit (i.e. 2-3mm) off..?

 

The disks alone to hire are £40...

[Nickfromwales]

That's not cheap, it's FREE 

[Roundtuit]

That's what I was hoping? 

 

If it's a low laitance liquid screed, doesn't it just need a quick once-over with a 60 grit to provide a key, rather than a couple of mil?

[Lesgrandepotato]

It looks like a pretty light going over, some good sized swirl marks in the surface. It's taken some thing off as we had paint all over the show. It was the screed guys who've done it. We looked at the hire of the kit at about 75quid for the machine and disk. Made no sense for my lads to do it at 125. 

 

That said we did have to wait until they were in the area to do it, they'd got three jobs lined up within a few miles that they did. 

[jack]

If you were expecting 10mm off the top, does only having had a couple of mm off make an important difference to your floor heights? None of our external doors would have opened if our floor had ended up 7mm higher than planned!

[Lesgrandepotato]

Its all good, the doors open outwards and we have a tolerance built in for the floor make up of tiles into the doors.