Sanding walls

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Discussion

singlecoil

33,728 posts

247 months

Tuesday 30th January 2018
quotequote all
There are plenty of extractors on the market. Basically the same as vacuums but with a socket you plug the sander into. When you turn the sander on, the vacuum will start automatically and run for a few seconds after you turn the sander off.

For instance

http://www.argos.co.uk/product/6734686

Powerful machines, so when you are sanding make sure the filter doesn't get clogged or the motor will overheat.

Do not use a sander without a suitable vacuum extractor.

Trustmeimadoctor

Original Poster:

12,642 posts

156 months

Tuesday 30th January 2018
quotequote all
I have a shop vac that I'd try it with first I can get away with 380 ish 700 ish for the propper extraction unit is a bit much at the mo

Or the sebo but Mrs would kill me

singlecoil

33,728 posts

247 months

Tuesday 30th January 2018
quotequote all
Trustmeimadoctor said:
I have a shop vac that I'd try it with first I can get away with 380 ish 700 ish for the proper extraction unit is a bit much at the mo
Did you miss the link to a perfectly adequate extractor that I posted earlier?

It's £140. I ran the previous model with a Mirka extractor for several years.



hyphen

26,262 posts

91 months

Tuesday 30th January 2018
quotequote all
Trustmeimadoctor said:
I have a shop vac that I'd try it with first I can get away with 380 ish 700 ish for the propper extraction unit is a bit much at the mo

Or the sebo but Mrs would kill me
I use a Deros with Abranet, hooked up to a normal Henry. No visible dust. If I was a pro, then would get a proper M-Class for maximum health protection, but for diy, its fine.

The hose may need an adapter to fit your vac, I use this type: https://www.mirka.com/product/#/8393001511/Adapter...

Edited by hyphen on Tuesday 30th January 10:57

fatfunkymonkey

63 posts

82 months

Tuesday 30th January 2018
quotequote all
I have just done this myself, used an orbital sander to get the worst of the imperfections out followed by an Aldi "special buy" dry wall sander to get the surface flat again. lots of dust so get a good mask with plenty of spare filters, windows open with outward facing fan. I also left Henry turned on and that seemed to help the dust clear.

Trustmeimadoctor

Original Poster:

12,642 posts

156 months

Tuesday 30th January 2018
quotequote all
Right thinking
The 5650 cv deco kit at £380

B17NNS

18,506 posts

248 months

Tuesday 30th January 2018
quotequote all
Trustmeimadoctor said:
Right thinking
The 5650 cv deco kit at £380

Trustmeimadoctor

Original Poster:

12,642 posts

156 months

Tuesday 30th January 2018
quotequote all
Mrs gonna kill me!

King Herald

23,501 posts

217 months

Tuesday 30th January 2018
quotequote all
V8RX7 said:
I've never known anyone machine sand plaster walls.

If a quick blast with something like this
https://www.screwfix.com/p/pole-sander-260-x-85mm-...

doesn't work then it's better to re skim
^^^This^^^

I’d be using a fairly big sanding block, with some good quality fairly rough paper on, sand in straight lines up and down. A random orbital sander will chew soft plaster to bits and leave your wall with curved marks on it. As well as be hard work, vibrating like crazy all day long.



Or


B17NNS

18,506 posts

248 months

Tuesday 30th January 2018
quotequote all
Head over to any of the pro decorator forums/Facebook groups (actually don't, it's not the most exciting of subject matter smile) and you'll see them all switching to Mirka's with extraction for this very purpose.

Trustmeimadoctor

Original Poster:

12,642 posts

156 months

Tuesday 30th January 2018
quotequote all
Do I become a pro when I receive it?

The next issue is making sure I don't make a dogs ear of the painting! Oh and buying decent brushes and roller

B17NNS

18,506 posts

248 months

Tuesday 30th January 2018
quotequote all
Trustmeimadoctor said:
Do I become a pro when I receive it?
No, for pro status you'll need a 5p carrier bag to keep your tools in.






and a Skol habit hehe

The future is spraying.

http://www.graco.com/gb/en/products/contractor/eme...

https://www.youtube.com/watch?v=AnvpOMLK92s

Edited by B17NNS on Tuesday 30th January 16:36

V8RX7

26,913 posts

264 months

Tuesday 30th January 2018
quotequote all
B17NNS said:
Head over to any of the pro decorator forums/Facebook groups (actually don't, it's not the most exciting of subject matter smile) and you'll see them all switching to Mirka's with extraction for this very purpose.
I don't understand... very quickly you'll be through the hard outer and the surface falls apart - particularly on older plaster.

If it's rough it needs filling / skimming not sanding

I'll admit the fancy extraction / sanders would be perfect for the resin worktops we've just fitted - my god that was dusty.

B17NNS

18,506 posts

248 months

Tuesday 30th January 2018
quotequote all
V8RX7 said:
I don't understand... very quickly you'll be through the hard outer and the surface falls apart - particularly on older plaster.

If it's rough it needs filling / skimming not sanding

I'll admit the fancy extraction / sanders would be perfect for the resin worktops we've just fitted - my god that was dusty.
I'm not saying sand it until it's all flush. I'm saying fill the imperfections with Easi- fill and then sand (120 grit should be fine for plaster). You'd need to be very aggressive with grit and pressure to burn through 2 or 3mm of finish to hit the backing coat.

https://www.youtube.com/watch?v=6wa_m_RKWjw&t=...

I'm multi-trade so always skim. But this is a DIY'able solution which with a bit of work can give the same results as a re-skim.

V8RX7

26,913 posts

264 months

Tuesday 30th January 2018
quotequote all
B17NNS said:
I'm not saying sand it until it's all flush. I'm saying fill the imperfections with Easi- fill and then sand (120 grit should be fine for plaster). You'd need to be very aggressive with grit and pressure to burn through 2 or 3mm of finish to hit the backing coat.

https://www.youtube.com/watch?v=6wa_m_RKWjw&t=...

I'm multi-trade so always skim. But this is a DIY'able solution which with a bit of work can give the same results as a re-skim.
Fill and light sand - fair enough - that didn't seem the OP intention.

However IME the older plaster you have less than 1mm of hard outer before it all goes to crap.

Trustmeimadoctor

Original Poster:

12,642 posts

156 months

Tuesday 30th January 2018
quotequote all
Less than about 6 years old the house it's just getting the really bad finish the builders left on every wall!

hyphen

26,262 posts

91 months

Tuesday 30th January 2018
quotequote all
B17NNS said:
I'm multi-trade so always skim. But this is a DIY'able solution which with a bit of work can give the same results as a re-skim.
Also multi-trade (diy) and nowadays I actually prefer to easil-fill the whole thing and sand down. Especially ceilings. Literally skim the whole thing with filler using a larger trowel, and then sand down. Perhaps repeat once more if needed.

With a good sander, it's much less demanding physically than skimming, plus you can paint same day as opposed to waiting for it to dry.

Did a flawless ceiling last time around, took out all cracks in a lathe & plaster, bonding to the lathes then filled and sanded. Deros doesn't weigh anything and hose is long so nice and easy.

Edited by hyphen on Tuesday 30th January 20:02

hyphen

26,262 posts

91 months

Tuesday 30th January 2018
quotequote all
Trustmeimadoctor said:
Right thinking
The 5650 cv deco kit at £380
If you haven't already, look on ebay, some good deals tend to be on there from reputable authorized sellers. Useful to get a package including sheets, as Abranet isn't sold by many (any?) retail stores so saves waiting for delivery later.

With you mentioning woodworking later I would say once decorating is done, sell it on within the guarantee period (3 years?) and should easily get most of it back.

Reason for this is that imo Deros isn't the best tool for woodworking-great finish sander, but takes ages for any hardwood stuff needing major work - it very lightweight so you need to apply pressure. (I did floorboards using Abranet HD and whilst came up fine, would have been much faster with a more aggressive device such as the dual rotex stuff).

Edited by hyphen on Tuesday 30th January 20:07

Trustmeimadoctor

Original Poster:

12,642 posts

156 months

Wednesday 31st January 2018
quotequote all
Well its done 5650 and a v-tuf m class extractor ordered!

King Herald

23,501 posts

217 months

Wednesday 31st January 2018
quotequote all
singlecoil said:
There are plenty of extractors on the market. Basically the same as vacuums but with a socket you plug the sander into. When you turn the sander on, the vacuum will start automatically and run for a few seconds after you turn the sander...

...Powerful machines, so when you are sanding make sure the filter doesn't get clogged or the motor will overheat.

Do not use a sander without a suitable vacuum extractor.
I have one such vacuum myself, from Screwfix, £70. It is basically a decent sized ‘shop vac’. Very useful having the automatic on/off when using the sander. I’d recommend wearing hearing protection if you have a sander and a vacuum going at the same time for a while.

https://www.screwfix.com/p/titan-ttb430vac-1400w-3...