Impey easy fit wet room former

[dogman]

Fitting my Impey wet room former and am ready to screw it down.

 

However i have read the instructions and watched the video but cannot see them using mastic either under the tray or between the rotating ring and the tray.

For those who have fitted an "easy fit" is this right?

[Nickfromwales]

5 hours ago, dogman said:

Fitting my Impey wet room former and am ready to screw it down.

 

However i have read the instructions and watched the video but cannot see them using mastic either under the tray or between the rotating ring and the tray.

For those who have fitted an "easy fit" is this right?

It's down to how good the subfloor is tbh. I always set them into a lattice of Sikaflex EBT and drill and countersink every single hole position. 

 

A solid deck of 18mm plywood

 

D4 expanding wood glue ready for fitting the 9mm fillet of ply used to raise the tray accordingly, 

 

The tray set into SF and screwed at every hole marker ( the little pillars seen in the GRP from underneath ). See the little circles in the pic above   

 

You don't need mastic on the ring TBH ( DONT USE SILICONE WITH GRP EVER ) but I do use EBT regardless as I know it's bombproof then. The reason that Impey don't show that is because they assume you'll be covering the whole thing with they're waterproof decoupling membrane which terminates into the mouth of the waste, therefore after / past that ring and below the surface of the tray, negating the requirement of any sealant anywhere as the water ( in theory ) cannot ever get there anyway. 

Problems arise if you stray away from the Impey family of products so are you using their membrane? 

[dogman]

15 hours ago, Nickfromwales said:

so are you using their membrane

Thanks an excellent post as normal

 

Yes we are using the full impey system.

 

will need to fill a couple of areas with ply as they didn't show that either but as we have yet to board the ceiling underneath its not an issue 

 

 

[Nickfromwales]

5 minutes ago, dogman said:

Thanks an excellent post as normal

 

Yes we are using the full impey system.

 

will need to fill a couple of areas with ply as they didn't show that either but as we have yet to board the ceiling underneath its not an issue 

 

 

The ply is belt n braces but I'd never even consider doing it without it tbh. 

Are you saying you need to offer the ply up from underneath in sections ?

[dogman]

yes 

 

we have pozijoists that are about 100mm wide 

 

they run approx 1 each edge and one in the middle. 

 

as per instructions added extra support at each end as well

 

don't have a picture of floor  but this is what it looks like.

 

the next picture is of the other bathroom that has a 25mm stone tray this has ply fitted on top of the joists

it shows how i have framed the opening

 

all supports are glued and screwed

[Nickfromwales]

Youll be fine with what you have there tbh, with the additional cross bracing. The one I did had the ply for a few reasons, one was to act as a noggin as the TF company had decided they aren't necessary ?

Your arrangement is much like another I did with the same tray.    

15 lengths of 3x2 iirc