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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Carpentry Questions >> bathroom floor- its chipboard!! https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1229104531 Message started by birty on Dec 12^th, 2008, 5:55pm

Title: bathroom floor- its chipboard!!
Post by birty on Dec 12^th, 2008, 5:55pm

Just had a new 22mm chipboard floor layed on the joists (Obviously!!) in our new build house but the ensuite and bathroom are 22mm chipboard aswell. Should I treat it or something? Whats the best thing to do. :-?

Title: Re: bathroom floor- its chipboard!!
Post by jasonB on Dec 12^th, 2008, 6:40pm

What are you intending as the floor finish? as this will determine what you heed to do.

Jason

Title: Re: bathroom floor- its chipboard!!
Post by woodsmith on Dec 12^th, 2008, 6:42pm

If it's green, then it is already moisture resistant and you don't need to do anything

Title: Re: bathroom floor- its chipboard!!
Post by jasonB on Dec 12^th, 2008, 7:52pm

Unless you intend to tile onto it

Jason

Title: Re: bathroom floor- its chipboard!!
Post by Lectrician on Dec 13^th, 2008, 7:24am

All the builds around my area use green chipboard throughout these days.

Title: Re: bathroom floor- its chipboard!!
Post by birty on Dec 13^th, 2008, 10:58am

Its gonna be Amtico/karndeen I think at this stage. It may even be tiled. Too early to say. Assume worst case scenario- it needs waterproofing? It aint green, that was fitted in my mates new house because he was timber frame and the floors remain exposed to the elements whilst building. Mine is normal 22mm E - Sonae UK Ltd Dek P5 T&G. Well thats what it says on the label. :-?

Title: Re: bathroom floor- its chipboard!!
Post by jasonB on Dec 13^th, 2008, 12:42pm

their P5 is moisture resistant so you won't need to add anything.

For the Amtico the installer will likely lay a thin sheet of ply, laytex the joints and then lay onto that.

Chipboard is not suitable to tile onto, you will need to overboard it with a minimum of 12mm WPB ply depending on your joist spacing. or if this creates height issues rip up the chipboard and replace with 22mm flooring ply or 25mm WBP ply.

You will need to decide on what floor covering soon as the sanitary ware should sit on top of any tiled surface so the plumber will need to know to set them possibly upto 25mm above the chipboard

Jason
Jason

Title: Re: bathroom floor- its chipboard!!
Post by birty on Dec 13^th, 2008, 1:16pm

P5 - You must have heard of it before then?? Is it an industry standard?? Do I not need to cover it with a sealent just to be safe??
Yes I realise the issues with floor levels/plumbing because I have just First fixed the electrics to the house and kitchen and we aint even confirmed the layout of the Kitchen!!!! Decisions, decisions!!! I only know the location of baths showers etc at moment. Again I need to really purchase it all!! (and floor finish) :(

Title: Re: bathroom floor- its chipboard!!
Post by jasonB on Dec 13^th, 2008, 4:45pm

you can read a bit more here

http://www.sonaeuk.com/04_10_particleboard.htm

I would not apply a sealant as you will only be applying it to one side this will cause an imbalance in the board which may lead to cupping/bowing as moisture in the air will affect one side and not the other.

Jason

Title: Re: bathroom floor- its chipboard!!
Post by CWatters on Dec 16^th, 2008, 7:53am

birty wrote on Dec 13^th, 2008, 1:16pm:

I need to really purchase it all!! (and floor finish) :(

Welcome to self building. I made a list of all the "client supply" items I would have to buy for my builders. To my surprise there were 70 items on the list! Couldn't keep up and had to tell them I would do one ensuite and some light fittings myself. Two years later I still haven't got them all done :)