Browse Forums Paving & Concreting 1 Oct 04, 2008 6:49 pm Im about to embark on a long term wooden floor project (when they cost this much its the only way) Im intending to paint on some kind of damp protection on the slab (and may use it like that for a while) then cover with plywood (bolted to slab, and finaly nail and glue tongue and groove 135mm wide spotted gum to the plywood.
Question: What paint on product can I use for the damp protection, and how would i need to prepare the slab (its brand new with paint marks all over) Re: Water proofing for concrete in prep for wooden floor 2Oct 04, 2008 7:01 pm something like davco k10 would be fine as long as there is no negative hydrostatic pressure (rising damp) app. $250 per 20 ltr drum
with new slabs / concrete it is advisable to acid etch concrete first but being internal thats not really an option you could look at a scarfing machine but that is probably going over kill the best option is to obtain the membrane if you need it, and follow the manufactures instructions on pre application preparation. the ply would only need to be ramset to slab not bolted Da Vinci Outdoor Living Architectural landscaping http://www.davincioutdoor.com Re: Water proofing for concrete in prep for wooden floor 3Oct 04, 2008 8:07 pm What would equate to negative hydrostatic pressure, is that normal moisture that one would encounter in their slab, If so then I may need something a little more moisture tight.
And do you know if you can treat Davco K10 like a floor covering for a while? Re: Water proofing for concrete in prep for wooden floor 4Oct 04, 2008 8:43 pm normally neg. static is encounted on, as an example an external concrete slab (alfresco etc) were ground moisture can rise thru the concrete and get in between the membrane and the top surface (no poly membrane)
i would be assuming that your house slab whether raft or pod would not encounter rising damp aslong as there is no rising ground water like the lower part of lynbrook estate had / has. under your slab there is a poly plastic membrane layed over the rock base / sand pads, this helps to reduce ground moisture from underneath but not from the sides of your slab, agg. drains etc control moisture / water above and some sub surface moisture / water but in saying that it would be unlikely that you would encounter this problem. the timber floor installer would be the best person to ask. most flexable paint on membrane's can be traficable but if you pierce the membrane then it is useless. so in short for a small amount of time k10 can be left expossed but you would probably damage it. there may be a purpose made membrane / sheet available for your application so as i said speak to your floor installer and or supplier Da Vinci Outdoor Living Architectural landscaping http://www.davincioutdoor.com Re: Water proofing for concrete in prep for wooden floor 5Oct 04, 2008 9:17 pm Thanks for that Davinci, It certainly sounds like you know what your talking about. I may just use a concrete floor paint in the meantime and use a plastic membrane when the time comes to cover with plywood. Re: Water proofing for concrete in prep for wooden floor 6Oct 04, 2008 9:21 pm if you use a concrete paint then chances are if you do need a paint on membrane which you probably dont, the paint will need to be stripped of before membrane application Da Vinci Outdoor Living Architectural landscaping http://www.davincioutdoor.com Re: Water proofing for concrete in prep for wooden floor 7Oct 04, 2008 9:53 pm You dont need to waste money on applying a water proof membrane. All you need to do is get a roll or 2 of thick black plastic and lay that out and tape up the joins. Then the plywood can be fixed on top of that using 5.5mm drive pins and then the flooring glued (using a 3-4mm notched trowel and something like Bostic flooring adhesive) and secret nailed ontop of that.
The plastic does the same job as any waterproofing membrane and is much cheaper. Re: Water proofing for concrete in prep for wooden floor 8Oct 06, 2008 8:39 am I agree with I_Build, plastic membrane is quite acceptable if installed correctly.
There is some great information at the following site http://www.timber.org.au/menu.asp?id=101 Good luck - keep us posted. Re: Water proofing for concrete in prep for wooden floor 9Oct 13, 2008 8:44 am I did a test in the garage this weekend.
I acid etched the concrete using a watering can(... big mistake, i should have used a pneumatic garden spray ) which didnt allow the acid to cover the whole floor surface. I did manage to get a milder mix spread over the whole surface later though. Lessons learned: (all of which were not on instructions) dampen concrete before applying acid. apply acid with fine spray wear face mask. I then proceeded to water blast the acid off. Lesson learned: stick painters tape firmly to skirting before using gurney. Then squeeged the water off and left to dry for 2 days before painting. lesson learned about painting a floor: water down first coat ( 20% water) Then apply second coat undiluted (will be much easier on your arms) All in all, I learned a lot and got a pretty good result. so now,I have to figure out how to acid etch inside the house without damaging the walls and kitchen cabinets. Any one out there done this before Re: Water proofing for concrete in prep for wooden floor 10Oct 14, 2008 7:11 pm if you have a decent pressure cleaner ie : petrol you can hire hand held floor cleaners that attach to cleaner and have an acid intake, no splash etc and you will also need an industrial wet vac, with a mate on the end of it sucking up water etc as you clean.
most pressure washer suppliers hire these out Da Vinci Outdoor Living Architectural landscaping http://www.davincioutdoor.com thanks Chippy, i hope they have applied sealer but i am doubt to be honest, so i am gonna do this job after handover. 8 16286 It worked for me in getting all non notified rain days removed from the builders claim, although the LDs was only $50/day 7 5952 Scientists have used random matrix theory to demonstrate theoretically that the neutrino mass hierarchy can be explained mathematically. When a substance is fragmented… 21 20660 |