fixing hardibacker 250 to a highly glossed floor

[kilty55]

lo all,ive fixed hardi boards numerous times with addy and screws to t and g boards,,this job i have looked at has an old painted border on it...seems to have been done profesionally a long time ago and has a very glossy varnish over the boards,,what do you guys/gals reckon will it be safe enough to fix as per normal over these floor boards?

 

[doug boardley]

Jamie, I'd be inclined to run a belt sander (or orbital) over it to remove the varnish

 

[White Room]

Same as Doug, rough the surface before fixing

 

[kilty55]

cheers doug i was thinking this to rough it up/key the boards again

 

[DHTiling]

The adhesive is just to take up voids not adhere it..

 

[kilty55]

surely it also helps it more solid on the floor tho dave?

 

[DHTiling]

why..?.. the screws are to pull the board down and adhesive fills voids/// not rocket science..:smilewinkgrin:

 

[TheWrightTiler]

am with dave on this, but if u can be fussed roughing up then cool

andy

 

[White Room]

If the adhesive dos'nt stick to the floor it's only the screws holding the board IMO

 

[jay]

If the adhesive dos'nt stick to the floor it's only the screws holding the board IMO

yes thats right adh is mainly to fill hollows (cuped floorboards ect) it sticks to backer board and screws do the holding thats why screws are better than nails

 

[doug boardley]

I was thinking more along the lines of primer soaking into t and g, :shy:

 

[DHTiling]

It states on the HB site that the adhesive is just to take up voids in the substrate,,

 

[White Room]

yes thats right adh is mainly to fill hollows (cuped floorboards ect) it sticks to backer board and screws do the holding thats why screws are better than nails

I actually forgot to screw one to the floor but used sbr with the addy and it stuck, I was advised from a shop to nail and adhesive under the hardie then remove nails:yikes:

 

[doug boardley]

It states on the HB site that the adhesive is just to take up voids in the substrate,,

but you know us guys from plastering backgrounds are happy to rough it up:lol:

 

[DHTiling]

If you like it ruff, who am i to disagree..:lol: