Rising damp fun

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29 Mar 2005
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Hi all.

I've got a 20 year old garage with a concrete base that can't have a Dpm as the floor inside is damp.

It's not flooded or running with water but the concrete has slightly damp areas that look darker and feel damp.

I want to make it a usable garage to fix my car in over the wet months rather than in the street in howling wind and so would like to make the floor a bit more hospitable to spend hours on my back on.

My initial thought was 4 sheets of 9mm osb3 on top of a 1000ga sheet this would fit nicely and although I'm not looking for it to last forever I'm not sure how it would stand up to jacks and axle stands.

My second thought was an epoxy 2 part garage floor paint. I've found one called floorsaver that should give 2 coats for about 40 quid but not sure how well it will do on my damp floor.

I've got very little to spend on this hence me having to fix the car myself rather than the pros so anyone with experience or advice on the floor issue would be much appreciated.

Thanks
 
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If you're getting the OSB for free then fine, you may find the garage starts smelling a bit damp (with all the water trapped beneath the DPM).
For comfort you might to better with those interlocking soft tiles that appear occasionally in Halfords etc at £10 for 6- they'll just compress under axle stands but give you a nice warm soft surface to wriggle around on (I use them on my gravel drive and in the garage all the time, makes a massive difference to how long you can work before getting tired and fed up)
If the concrete is damp I wouldn't shell out on expensive floor paint, good odds it'll fail quite quickly
 
Don't just stick OSB down it'll end up trapping bacteria and moisture under there and it'll stink.
 
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As soon as you cover it the for will stop evaporating naturally and it will get wetter and wetter. The dpm must be continuous to keep it all out.aa sensible way
aywould be and blinding dpm and then something like screed on top. You have to protect the dmp from damage or movement.
 

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