PVC-U Double Glazed Windows, Doors, PVCu PVC, uPVC Conservatories -
in association with Double-Glazing-UK.co.uk
PVC-U, uPVC, PVCu Replacement
an excellent, highly insulate material, which benefits from little or no
external maintenance. It is readily available and well tested and is
usually the lowest cost option of all three materials. It is mainly seen
in white but also available in Mahogany and Oak woodgrain styles. PVCu is
by far the most popular material for windows and doors today.
are many well-proven PVCu extrusions available. Problems with
discoloration are virtually unheard of and most suppliers will warrant
against this. The design of the windows varies from company to company.
Here are a few of the main points. You may like to raise them with your
Internal or Externally glazed
PVCu systems will now give you this option. As a generalisation Internally
beaded windows (where the glass is held in from the inside) are considered
more secure and burglar resistant. That said there are a lot of
satisfactory externally beaded PVCu systems about - many of which feature
either internal wedge gaskets or a "double sided" tape which holds the
external bead firmly in place. You should investigate this particular
issue with your supplier.
Thickness of PVCu
Most PVCu systems for window and door
construction are "multi-walled" with internal reinforcement by means of
either Aluminium or Galvanised Steel box section. Wall thickness can vary
from system to system - most are around 3 - 3.5 mm thickness. Generally
speaking the "thicker" the walling - the stronger the section. Ask your
supplier for an example section and enquire if the frames are fully
reinforced. Note also that the greater the number of internal walls - the
greater the strength.
Depth or thickness
Actual depth of frame extrusion varies from
as low as 50 mm to a number at 70 mm and above. Most are in the 60 - 65 mm
region. Clearly this does have an effect on the structural strength of
your replacement window or door. This is especially worth bearing in mind
when comparing prices. It would not for instance be fair to compare the
price of a conservatory built using a 55 mm depth of frame with a window
made using 70 mm depth of frame.
We bring the points above
to your attention purely to give you a feel for the sort of questions you
should ask a potential supplier. The above is by no means the whole story,
and there will be varying arguments one way and the other.
a short list of PVCu systems companies supplying extrusion for the
manufacture of PVCu windows and doors in the UK. These include Rehau,
Veka, Spectus and Synseal.
For some, however, PVCu lacks
authenticity when it comes to the more traditional designs. It is not
acceptable to planners for use on listed buildings and not popular with
planners in conservation areas.
colour do you want? You name it and today you can almost certainly get it.
Standard colours for PVCu and aluminium are white, whilst for hardwood it
is a natural stain option such as mahogany, walnut or light oak. You can,
however, have hardwood already primed in green, cream and teak plus a
whole host of options to your specification. PVCu in mahogany woodgrain
and cherry oak woodgrain styles is also increasingly popular.
Additionally, both PVCu and aluminium can be specially coloured in red,
blue, green, black and orange! (and that's just a few of the
The above only really touches the surface on some of the
options available. Your supplier will be pleased to give you a more
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