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Posted by Tim Leech on August 9, 2008, 3:14 pm
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On Sat, 9 Aug 2008 18:50:56 +0100, "Andrew Mawson"
>
>> I am setting up a new workshop in my garage.
>> I need to address the state of the floor, before investing my hard
>earned
>> cash in machinery
>> It is 40+ year old concrete, which is dry and dusty in some areas,
>but with
>> some very significant damp patches.
>> I suspect it was laid without any damp proofing.
>> I have done some research on the web, which has not been very
>conclusive.
>> Most coating systems I have seen say don't apply if there is any
>damp
>> present
>> Does anyone out there have any experience of dealing with a similar
>> situation?
>> Any recommendations would be greatly appreciated for a cost
>effective method
>> of sealing the floor.
>>
>> Regards
>>
>> Stuart
>>
>
>Only really effective solution is to Kango it up and re-lay it
>incorporating a membrane. If the cracked bits seem stable and not
>moving relative to each other you may get away with an epoxy patching
>cement then epoxy floor paint, but it'll probably crack again I'm
>afraid.
>
>I've just finished jack hammering out 1200 sq foot of cracked uneven
>floor in my new workshop, and I've re-layed a 6" slab of RC45 concrete
>with fibres incorporated, as well as 6mm reinforcing mesh all floating
>on 50 mm of polystyrene - obviously also with a dpc membrane.
>Needless to say a messy, time consuming and expensive process. I'll be
>p****d off if that gets damp or cracks !!!!
>
>AWEM
>
I didn't see any mention of cracks.
Before adopting Andrew's extreme cure, you could try a couple of coats
of diluted PVA glue. If nothing else it'll seal the dust to a degree,
and if the 'damp' patches are only damp and not wet, it might help
there.
Cheap & cheerful but no guarantees.
Tim
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> I need to address the state of the floor, before investing my hard earned
> cash in machinery
> It is 40+ year old concrete, which is dry and dusty in some areas, but
> with some very significant damp patches.
> I suspect it was laid without any damp proofing.
> I have done some research on the web, which has not been very conclusive.
> Most coating systems I have seen say don't apply if there is any damp
> present
> Does anyone out there have any experience of dealing with a similar
> situation?
> Any recommendations would be greatly appreciated for a cost effective
> method of sealing the floor.
>
> Regards
>
> Stuart