Priming of floorboards before fixing cement boards?

[mmmadman]

Hi all

I'm using Topps Trade Rapid-Set Flexible adhesive to secure 6mm Hardy cement boards onto floorboards, do I need to prime the floorboards with anything?

Many thanks

 

[mmmadman]

Forgot to add that I am also screwing them down......

 

[jay]

you dont need to prime floorboards as the adh under cementsheet is only to fill voides so cementsheet is flat and sound screws hold it in place recomend you stagger c/s

 

[mmmadman]

Thanks for the quick reply, what type of screws do u recommend as the Hardy ones are to long @ 28mm. I got some external use screws from B&Q....!

 

[jay]

best bet to go with the recomended ones or ones nearly identical external grade is better check around there are shorter ones

 

[CCTiling]

I would be using a 2 part superflex adhesive and 25mm stainless steel screws

 

[doug boardley]

Thanks for the quick reply, what type of screws do u recommend as the Hardy ones are to long @ 28mm. I got some external use screws from B&Q....!

How thick are your floorboards?

 

[The Legend; Phil Hobson RIP]

I like to overlay t&g with ply 9mm in small, deflection free areas screwed at 6" centres, then glue and screw Hardie 6mm (or the like) cement board over this. I know it might not be exactly to the book, but I also know it works. I am now ready to receive the back lash. ( I always use Mapei Keraquick with latex plus) never had a problem:smilewinkgrin: I would like to hear anyones comments on this method.:yikes:

 

[DHTiling]

In theory Phil, it is to spec .. 15mm over board but with double layer adhesive.. so OTT for some..

 

[doug boardley]

I like to overlay t&g with ply 9mm in small, deflection free areas screwed at 6" centres, then glue and screw Hardie 6mm (or the like) cement board over this. I know it might not be exactly to the book, but I also know it works. I am now ready to receive the back lash. ( I always use Mapei Keraquick with latex plus) never had a problem:smilewinkgrin: I would like to hear anyones comments on this method.:yikes:

do you mean the old style floorboards Phil, as opposed to t&g chipboard flooring?