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Self-Fit
Guide
2.1 REMOVAL TECHNIQUES –
Metal Windows
There are two main types of metal windows
which may have to be removed:
1. Aluminium Windows, either directly fixed to brick work or
set into a timber sub-frame.
There should be screws retaining aluminium frames to the timber
sub-frame or brick wiork which are generally easy to remove.
Removal of these retaining screws allows easy removal of the
aluminium framework. Opening sashes and fixed glass and sub-frames
should be removed using the same method as timber windows, although
many aluminium systems have beading and gaskets which can be
removed by using a putty knife or screwdriver, allowing easy
access to the retained glass.
2. Metal Windows, usually steel and mostly known as “Crittal
Windows”.
Metal windows are usually directly fixed to brick work by lugs
or screws. Remove opening sashes by using an angle-grinder or
hacksaw. Drive screws or lugs through the frame work by using
a punch. Cut through the outer frame work by using an angle-grinder,
using removal methods similar to timber window removal. Cut
through or grind down lugs or screws to the brick-line, if difficult
to remove, as leverage may cause damage to the fabric of the
brick aperture.
2.2
REMOVAL TECHNIQUES – Timber Box-Sash Windows
Most box-sash windows pre-date modern cavity walling and are
built into the internal reveals of solid brick work. Therefore,
removal take place from the inside of the building in all cases.
Houses built around and before the Victorian age, may have retained
interior decorative timber cladding or architraves built around
the inside of box-sash windows. If this material is to be retained,
careful removal, using a sharp knife on joints and careful prising
can successfully retain these materials for re-installation.
1. Remove beading to the front of the lower sash to allow free
access to the lower sash.
2. Cut the sash cords to either side of the frame work. This
will release the weights within the side boxes – You may
hear the weights drop - Do not panic !
3. Remove the lower sash in one piece and dispose.
4. Remove the parting beading between the lower and upper sashes.
5. Remove the upper sash in one piece and dispose.
6. Remove the lining of the boxes to expose the cavity and weight
mechanisms.
7. Remove all box material and weights.
To Bear in Mind:
Removal of box-sash windows often exposes years of accumulated
major debris and dirt.
The depth of old box-sash framework may be up to 250mm. Our
upvc replacement windows in casement style are 70mm deep and
balance spring vertical sliding sash windows are 128mm deep.
Plastering or cladding of the make-up area will be required
in most cases.
Please consult a Customer Services Team Member on 0870 7744775
for further advice or information of techniques and reinstatement
options.
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