Hi all

I am planning to replace a leaky shower tray. It is in an alcove whose
walls are made from "Paramount" type partitions (i.e. a cardboard
honeycomb sandwiched between two sheets of plasterboard).

The alcove is 74 cm wide. The existing shower tray is about 78cm wide
and is mounted on a riser kit in such a way that the top of the tray
is about 26cm from the floor.

In order to accommodate the tray, an 11cm tall section of the sheet of
plasterboard was cut away on all three sides of the alcove (so in that
"slot" area, the wall consists of just the cardboard honeycomb and the
rear plasterboard face). The cut-away section starts at 19cm from the
floor and stops at 30cm from the floor.

I suppose the easiest thing to do would be to put in a new shower tray
at the same height. However, it would look neater if the tray could be
lower. As far as the waste pipe is concerned, that would be fine as
the waste runs at a height of a couple of cm above the (chipboard)
floor for 40 cm or so before disappearing under floor. Can anyone
recommend a way of patching the Paramount board so that the new tray
can be set lower than the old one?

thanks

Julian

On May 29, 6:09*pm, " wrote:
Hi all

I am planning to replace a leaky shower tray. It is in an alcove whose
walls are made from "Paramount" type partitions (i.e. a cardboard
honeycomb sandwiched between two sheets of plasterboard).

The alcove is 74 cm wide. The existing shower tray is about 78cm wide
and is mounted on a riser kit in such a way that the top of the tray
is about 26cm from the floor.

In order to accommodate the tray, an 11cm tall section of the sheet of
plasterboard was cut away on all three sides of the alcove (so in that
"slot" area, the wall consists of just the cardboard honeycomb and the
rear plasterboard face). The cut-away section starts at 19cm from the
floor and stops at 30cm from the floor.

I suppose the easiest thing to do would be to put in a new shower tray
at the same height. However, it would look neater if the tray could be
lower. As far as the waste pipe is concerned, that would be fine as
the waste runs at a height of a couple of cm above the (chipboard)
floor for 40 cm or so before disappearing under floor. Can anyone
recommend a way of patching the Paramount board so that the new tray
can be set lower than the old one?

thanks

Julian

Fill the void(s) with canned foam. Trim off & skim. Or, push
plasterboard into the foam before it goes hard.. You will need to prop
it in position to stop the foam pushing it out. Do a good job of the
prop, the foam pushes quite strongly.
Helps if you spray a SMALL amount of water into the hole/back of
plasterboard. (water makes the foam go off).

BTW, you need to be sure water can't get to the paramount from the
shower. It's not in the slightest waterproof.

I used it years ago, it was quite good but haven't seen any for years.

Fill the void(s) with canned foam. *Trim off & skim. Or, push
plasterboard into the foam before it goes hard.. You will need to prop
it in position to stop the foam pushing it out. Do a good job of the
prop, the foam pushes quite strongly.
Helps if you spray a SMALL amount of water into the hole/back of
plasterboard. (water makes the foam go off).

Thanks I will try that!


BTW, you need to be sure water can't get to the paramount from the
shower. *It's not in the slightest waterproof.

I used it years ago, it was quite good but haven't seen any for years.

The house was built in about 1993, it looks like all the internal
partitions are made from this. Luckily the tiles in the alcove came
off cleanly, as it would have been a pain to repair/replace the walls
if they has been damaged