My bathroom has been completely refurbished and installed the chipboard floor extremely rotten so was replaced with chipboard.
Sealant for chipboard flooring.
Seal the floor using granfix acrylic bonding agent and allow it to dry.
Lay the pieces in the room according to your sketch on graph paper.
Apply a subfloor sealer.
The best floor sealer for pet urine is a stain blocking primer such as kilz 3 premium interior exterior primer which not only blocks stains and odors but also contains a mildewcide.
Work from one end of the room to the other moving backward as you apply sealant.
Set pva is water soluble so that won t work.
What you may.
If your floor passes the two fat men test proceed as follows.
Any all purpose oil or water based stain blocking primer will work especially if you apply two or three coats.
Let the sealer dry thoroughly.
Fix your tiles using granfix ultimateflex adhesive.
Hardie doesn t add strength to the floor as hardie recommend via a formula a maximum allowable deflection to allow hardie to be used on the floor.
Bathroom flooring grade chipboard usuaully with a faint green stain will not rot when it gets wet but it will probably still soak up piss and smell.
What is the best way to waterproof chipboard flooring.
Grout with granfix maxigrout flexible in your choice of colour.
Just getting wet from adhesive won t blow it.
Is the aim to handle bad aim or a potentially leaking toilet.
Chipboard fails when it is wet and stays wet.