Flooring & Floor Covering
May 10, 2021 10:13 pm
I Have bought an 80+ year old house, just doing the basics to move in, then ran into an issue when taking up old carpet in the back of the house (which was a later addition, ) carpet was moldy underneath. Got a damp/mold expert to come in to do damp meter readings etc.
He said the slab contains high levels of water, likely no damp membrane when poured did not cure properly and is also likely thin, as was laid over sandstone, so considering the less than great job, they probably didn't dig out enough of the sandstone before laying down the slap in the first place.
I have 3 conflicting pieces of advice being given from a number of different tradespeople... Would super appreciate any thoughts info or advice.
Does anyone have any different advice or opinions?
1- Use a Reactive penetrating concrete sealer + hotplug around edges + silicone injection for the interior and exterior walls & waterproof the first 500mm of bricks inside and out + add ventilation THEN float a floor on that. OR Tile it to further waterproof.
2 - Use Epoxy coating to seal it - 1 apply 2 coats of epoxy. Step 2. Apply 2 coats of WPA 100 + silicone injection for the interior and exterior walls & waterproof the first 500mm of bricks inside and out + add ventilation THEN float a floor on that. OR Tile it to further waterproof.
3 - Dig up / jackhammer up all the dud concrete, dig a little extra into the sandstone, seal this with a concrete coating on the edges and then gravel the bottom, lay down plastic pipes with drainage holes so that any moisture can drain away, more gravel, then place waterproofing membrane over the top of gravel. Create a frame possibly from metal, and then a floating floor on this?
Any help or advice, super appreciated
Re: Rising Damp in Concrete Slab Floor - Confused by options2
May 11, 2021 1:59 am
You can simply spray with Radcon, e.g. https://www.radcrete.com.au/product/rad ... la-7%C2%AE
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