been specified while the external
structure is partially dismantled to allow
the rusty components to be either
repaired and treated or replaced. We felt
it necessary that the external timber frame
should be fully exposed so that it can be
inspected and treated or replaced.
When one deals with conservatories,
one understands the Meccano-like form
of construction and it is comparatively
easy to take down and replace or fix on
Work is just commencing on site and
we have specified that we should inspect
all the ironwork and timber frame as it is
exposed so that decisions can be made
about how to deal with each of the
component parts. Once we have
dismantled the first section, we will be
able to look at the detailing to see whether
we can improve the present protection
from the elements. We have specified
that all the ironwork shall be grit blasted
to SA 2.5 and two coats of zinc-rich paint
applied with a chlorinate rubber finish; a
specification that we have used in the
past very satisfactorily. As far as the grit
blasting is concerned, this is initially to be
carried out ‘softly’ to see that no particular
harm is being done, particularly to the
finer details, before the final finish
specification is agreed.
The cracks to the cast iron columns
Above: photograph 3 - filigree structure -
applied both externally and internally.
Below: photograph 4 - section of columns
removed revealing timber.
will be investigated further after cleaning
off the paint, but we have specified that
these be stitch-welded which is a
comparatively easy operation.
Where it is necessary to replace cast
iron elements, it is not a particularly
expensive exercise because we will have
the original castings to form any necessary
The overseeing architects for the
owners are Weightman & Bullen - Peter
M Joyce; and the contractors are: DGT
Fabrications of Norwich - Cedric Profit.
I hope this article will give some
encouragement to Conservation Officers
who look at conservatories. I have yet to
find a conservatory which cannot be
repaired, assuming that the basic
structural elements exist.
Brian Morton is Consultant to The Morton Partner-
sh~pLt4 61 Islington Park Street, London Ni JQB.