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dasherdiablo1

Original Poster:

1,662 posts

109 months

[news] 
Friday 17th July 2009 quote quote all
My floor is driving me mad!

About 2 months ago I added a workshop to the back of my garage. Problem is the new concrete floor is continously dusting. Every time I sweep it it dusts up. This week I've applied 2 bottles of sealer from Wickes, I applied it exactly as advised in 3 coats but it hasn't make any difference. I've then applied 2 additional final coats and still rubbish.

Thing is I want to improve the garage next year my removing render and painting the walls/replacing roof etc and hope to put down a decent interlocking tile or paint (probably epoxy).

In the meantime I want to stop this dusting. Any ideas on best solution?

Thanks in advance!
David

TheD

2,753 posts

87 months

[news] 
Friday 17th July 2009 quote quote all
How long was the concrete down before you applied the sealer? What kind of sealer is it?. Is it a concrete sealer or a patio and brick sealer?
You could always try a Pva mix

T350 Al

573 posts

79 months

[news] 
Friday 17th July 2009 quote quote all
Just doing this myself now for the very same reasons! I've got my paws on some non-slip floor paint from B&Q; £17.99 for 5ltrs. I already used some undercoat to seal and am just waiting for some good weather to apply the non-slip.

Might be worth a look!

HRG.

60,286 posts

127 months

[news] 
Friday 17th July 2009 quote quote all
I used some Johnstones floor paint on mine, I think it says the concrete has to be down six months before application.


sleep envy

61,951 posts

137 months

[news] 
Friday 17th July 2009 quote quote all
the slab won't have fully cured in 8 weeks

water will still be bleeding from it which is why the sealant isn't staying down

give it another couple of months before you reapply it
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Orb the Impaler

1,881 posts

78 months

[news] 
Friday 17th July 2009 quote quote all
Mine is still doing this after 15 years!

dasherdiablo1

Original Poster:

1,662 posts

109 months

[news] 
Friday 17th July 2009 quote quote all
Thanks guys for the rapid response!

It's been down for around 3 months and to be honest that is more than enough time for it to have cured. On site you can load up Holorib concrete floors after 2 weeks!

I think the problem is these ready mix companies often add more water than is actually needed to keep it workable. The result being when you vibrate & then float the surface the cement/ballast settles leaving a watery weak layer at the top, this obviously remains weaker under traffic as the bulkier aggregate is deeper down. In hindsight I should have left it 50mm lower an then finished with a structural fibre screed!

I must admit I think I'll go down the PVA route and then paint at a later date.

sleep envy

61,951 posts

137 months

[news] 
Friday 17th July 2009 quote quote all
dasherdiablo1 said:
It's been down for around 3 months and to be honest that is more than enough time for it to have cured. On site you can load up Holorib concrete floors after 2 weeks!
after 3 months is a different story

cured sufficiently to load up is one thing, curing times is something else - have you never tested and analysed the test cubes?

bertie

6,419 posts

172 months

[news] 
Friday 17th July 2009 quote quote all
Once it's dry, forget trying to paint it, waste of time in my opinion and expierance, it'll always flake off, usually attached to your tyres!

I bit the bullet and did mine with this, the only way to get a decent floor IMHO.

http://www.versatileflooring.co.uk/garage-flooring...

StreetDragster

788 posts

106 months

[news] 
Friday 17th July 2009 quote quote all
Just on confirm, its this stuff you used from wickes?

http://www.wickes.co.uk/Concrete-Dustproofer-Surfa...

I did this on my driveway about six months ago, and i've got to say it worked perfectly.

In the garage i laid Epoxy garage floor paint, theres a thread on here i started about it somewhere, that has also worked perfectly.

Thanks

Matt

kellys hero

470 posts

138 months

[news] 
Friday 17th July 2009 quote quote all
This sounds ridiculous but it worked on my concrete floor which like the O.P was just concrete dust.

I put about 1/4 liter of PVA glue into a bucket of water and brushed it round with a broom, the water and PVA soak into the top of the concrete and the PVA seals it, you can then paint on top if you still want to. This stopped the dust overnight and has been down for 3 years now, there is a small patch I missed under the work bench which is still dusty so I could comapre before and after.

It is a very quick and inexpensive way to seal a concrete floor.

pimpin gimp

1,561 posts

88 months

[news] 
Friday 17th July 2009 quote quote all
kellys hero said:
This sounds ridiculous but it worked on my concrete floor which like the O.P was just concrete dust.

I put about 1/4 liter of PVA glue into a bucket of water and brushed it round with a broom, the water and PVA soak into the top of the concrete and the PVA seals it, you can then paint on top if you still want to. This stopped the dust overnight and has been down for 3 years now, there is a small patch I missed under the work bench which is still dusty so I could comapre before and after.

It is a very quick and inexpensive way to seal a concrete floor.
spot on, I did mine a few months ago. just load up pva and water into the fence sprayer (I'm lazy) spray all the walls and floor, brush the floor around a bit to make sure it;s even and leave for a day or two - once it's soaked in.. dust be gone!

bertie

6,419 posts

172 months

[news] 
Friday 17th July 2009 quote quote all
pimpin gimp said:
kellys hero said:
This sounds ridiculous but it worked on my concrete floor which like the O.P was just concrete dust.

I put about 1/4 liter of PVA glue into a bucket of water and brushed it round with a broom, the water and PVA soak into the top of the concrete and the PVA seals it, you can then paint on top if you still want to. This stopped the dust overnight and has been down for 3 years now, there is a small patch I missed under the work bench which is still dusty so I could comapre before and after.

It is a very quick and inexpensive way to seal a concrete floor.
spot on, I did mine a few months ago. just load up pva and water into the fence sprayer (I'm lazy) spray all the walls and floor, brush the floor around a bit to make sure it;s even and leave for a day or two - once it's soaked in.. dust be gone!
And then tile over it!

tom g

977 posts

83 months

[news] 
Friday 17th July 2009 quote quote all
Could also screed it, the self levelling stuff is very easy to apply.. just pour it on

GregE240

10,839 posts

155 months

[news] 
Friday 17th July 2009 quote quote all
I recently did mine with "International" garage floor paint from Homebase. Cost 40 quid for 5 litres.

I did not seal the concrete beforehand, and so far it has stayed down very well - even the areas which see a lot of "traffic" (i.e. out to the beer fridge & back).

I echo sleep envys comments about curing - if it is still letting water vapour out then painting it will be a waste of time as it will lift it off.

I got a roller on a long pole as well - you'd kill yourself doing it by brush. And preparation was everything - I brushed then hoovered the concrete to get the last vestiges of dust off.

crusty

369 posts

108 months

[news] 
Friday 17th July 2009 quote quote all
I believe that a concrete slab drys a mm a day, ie if you have a 100mm slab allow 100 days before painting etc

Biggriff

2,115 posts

172 months

[news] 
Saturday 18th July 2009 quote quote all
Elephant version; bigger and fatter; therefore better coverage!

The Lukas

2,770 posts

82 months

[news] 
Saturday 18th July 2009 quote quote all
PVA isn't bad.

dasherdiablo1

Original Poster:

1,662 posts

109 months

[news] 
Tuesday 21st July 2009 quote quote all
I went the PVA route and no more dust! Down side is I used standard PVA as I wasn't sure I'd be able to paint the waterproof PVA, which means if it gets wet it become 'live' again.

Can't wait to paint it!!!! What's the best paint?


StreetDragster

788 posts

106 months

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