Previous posts suggest screwing the plate to the chimney.
Errr how? The simplest I can think of is bending over an inch and using
rawl bolts ie all metal construction, a bit OTT but fireproof. The inch
forms a tab parallel with the chimney wall in order to screw through.

Presumably prior to that you connect up the liner to stove pipe and
afterwards you seal up the plate with fire proof sealent and then pour
vermiculite down the chimney. Top bit I'm okay with.

Would aluminium register plate be okay or is it likely to be too hot even
for that?

--
Mike W

visionset wrote:
Previous posts suggest screwing the plate to the chimney.
Errr how? The simplest I can think of is bending over an inch and
using rawl bolts ie all metal construction, a bit OTT but fireproof.
The inch forms a tab parallel with the chimney wall in order to screw
through.

Presumably prior to that you connect up the liner to stove pipe and
afterwards you seal up the plate with fire proof sealent and then pour
vermiculite down the chimney. Top bit I'm okay with.

Would aluminium register plate be okay or is it likely to be too hot
even for that?

For a normal gas fire 1/8" will be ok,but a stove needs metal.

You still have to seal around the edges with cement.

--
Sir Benjamin Middlethwaite

That's what I did in mine but I used stainless steel folded 25mm all round
then predrilled the holes in the fold down and used normal plugs with
stainless screws,also spread fire cement on fold before fitting and it gives
a more secure seal.the folded area was slightly sloped out on all sides.It
is much harder to work with but as I have no liner in my chimney I felt it
was more secure.As you have liner mild steel would be more than adequate.

Alex

Alex wrote:
That's what I did in mine but I used stainless steel folded 25mm all
round then predrilled the holes in the fold down and used normal
plugs with stainless screws,also spread fire cement on fold before
fitting and it gives a more secure seal.the folded area was slightly
sloped out on all sides.It is much harder to work with but as I have
no liner in my chimney I felt it was more secure.As you have liner
mild steel would be more than adequate.

Alex

If I may ask,how much did you pay for the mild steel?
Last job I done the guy paid 18GBP for a sheet of cement board.
Bitch of a job doing it that way.

--
Sir Benjamin Middlethwaite

Did not pay for the stainless steel,I managed to get a offcut that was just
right for my requirements from a friend

Alex wrote:
Did not pay for the stainless steel,I managed to get a offcut that
was just right for my requirements from a friend

You owe your friend a couple of pints then. :-)

Aluminium or Mild steel plate is expensive, particulary when the thickness
exceeds 1.5mm

--
Sir Benjamin Middlethwaite

If I may ask,how much did you pay for the mild steel?
Last job I done the guy paid 18GBP for a sheet of cement board.
Bitch of a job doing it that way.

--
Sir Benjamin Middlethwaite

I just paid £15 for 1000mm x 300mm galvanised 1.5mm thick steel plate
to use as a register plate, it cuts quite easily with a jigsaw and tabs
for fixing can be bent over with pliers.

It would have cost £90 to get it cut to size with holes etc.