How to install a balustrade over James Hardy Secura flooring?

[damon99]

I am installing James Hardie Secura Exterior Flooring over a balcony with a wooden structural frame. I will be applying a waterproofing membrane and tiling over it.

Finally, I plan to install an aluminum balustrade and was wondering whether I can screw the upright supports directly through the tiles and/or flooring into the joists, or if I need to cut out sections of the tiles and flooring so the balustrade posts can be fixed directly to the wooden joists.

[Jewelleryrescue]

Hi @damon99 

Balustrade's need to be rock solid I would be aiming to fix them as strongly as  possible to the wood joists.  Adding extra  joists if  needs  be to support the Balustrade 110%

Then floor sheet around the legs and waterproof and then tile. 

This way the fixing is solid the water proofing is absolute and dosnt need  breaching, The tiles  can be cut around the  legs too.