Priming

[Wood's better]

Evening all,

I hope you can help?

I have taken up an unsuitable floor and re laid using tongue and groove 22 mm plywood, glued joints and glued and screwed to the joists. I want to overlay with 6 mm Hardibacker

A question if I may?

Is it advisable to prime the plywood first and if so with which primer and dilution (I understand that the adhesive is only to fill voids, however, think I would like the best possible adhesion!)

Many thanks in advance

Richard.

 

[Gazzer]

You need to do what the adhesive manufcturer recommends , Some say No, others Yes.

 

[One Day]

Most would say prime the back and edges - leave the face clean and unprimed.
Just prime the areas which could (in theory) be affected by moisture ingress.

 

[tobins tiling]

I personally do prime the plywood or floor boards, I know Hardibacker say it's only to fill the voids but the floor feels a lot more solid when it's stuck down with tile adhesive and screwed so I think the primer will help the adhesive stick to the wood

 

[Wood's better]

Thanks all