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About pvc windows - About PVC-U Double Glazed Windows This...

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About PVC-U ouble Glazed indows This is 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. There 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 supplier . Internal or Externally glazed windows Most 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 walling? 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 of frame 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
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