Older PVCu windows were fitted with externally glazed beads, had simple cockspur locking handles and in short were basic windows designed to address the early need for replacing old original timber or metal windows. However there are clues in the pictures. One of the first things a window professional will notice is that it appears the glazing rebate that the glass sits against uses glazing tape.
Glazing tape is widely used in PVCu windows so this is nothing out of the ordinary. Modern externally glazed windows have moved away from tapes choosing secure internal wedge gaskets that do a far better job.
What closer inspection of the picture does show is a very basic frame profile. Compare this to a modern externally beaded window and there are many more grooves and channels that are designed into extrusions for many reasons and one being security. So we would guess from the tweeted images that this is a very early generation externally beaded window that lacks the design or glazing components to keep it secure.
The early generation PVCu windows were in fact externally beaded as were the very first aluminium windows. Move forward to current PVCu windows and the message of these products is still low maintenance but now it is also about security, thermal efficiency, aesthetics and window style choices. This was lacking on early double glazing.
One of the reasons why PVCu windows quickly moved towards internal glazing was the physical weakness of a plastic glazing bead. These early externally beaded windows were actually quite brittle and it was commonplace for external plastic beads to simply snap when removal by a glazier rather than a burglar was attempted. The PVCu industry quickly spotted the design flaw in a plastic bead that was so susceptible to breaking and being easy to remove and moved the beads to the inside of the windows.
This then created the marketing opportunity to promote internally beaded windows as more secure. The early design flaws in internally beaded PVCu products are all to evident when you look at how easy it is to kick in a PVCu panelled door. On the video by Distinction doors, one of the most noticeable things is how quickly the PVCu beads simply fall away from their glazed positions.
Regular readers will know that we promote the strength, aesthetics and other advantages of aluminium windows. But in the interests of fairness and balance, all modern double glazed windows and doors now have something older generations of windows did not — certification to recognised security standards. Early double glazing was sold on features that old metal or timber windows did not possess such as multi point locking.
But rarely was there official documentation to prove that windows were secure. Indeed specific testing institutes have been set up that test all types of windows in many different materials on a daily basis.
These tests are carried out with expertise and knowledge. The Police work with these institutes sharing their knowledge of how burglars break into windows, the methods and tools used as well as the knowledge gained from former burglars turned advisors. On a typical test a series of tools, attack methods, timed attack tests and much more is carried out to test the security of a window.
But do your research and any window can be broken into if the opportunist thief has ample time to do so. Therefore our view is that older generation windows have security flaws that those in the know can exploit. But this is actually no different from cars that had simple locks on the doors that could easily be picked with a coat hanger. As flaws in products have come to light so these have been enhanced over time. Smart Build Projects. Depending on frames even older glazed units with external beads will still need to remove internal gasket so as long as in good condition you should be able to de glaze panel and replace for a new glazing unit.
Really depend on who is buying and what are the expectations is it really worth changing complete Windows before a sale surly. If they are that bothered you can knock off the price you was going to pay for new ones.. Advanced Glazing Solutions. You can just replace the double glazed units into the existing frames easily.
Depending on the style of the frames some externally glazed windows have a internal wedge gasket, when removed this allows the unit to be pushed back against the frame allowing the beads to be removed. Another style is a double adhesive glazing tape which bonds the unit to the frame. Once the beading has been removed a wide putty knife can be used to run around the rebate with some glass cleaner or water and fairy liquid to ease the glue a little allowing the unit to be released.
Through my experience the new owner will probably replace the frames for a more efficient and modern style anyway. This cannot be removed without the glass being removed first. The wedge gasket is never placed on the outside of a window. The wedge gasket also plays a huge part in locking the window beads into place. Once pushed into the gap between the glass and the window frame the windows are secure. Aesthetics play a big part in choosing a window and externally beaded windows you may find look more attractive than internally beaded ones from the outside and vica versa when viewed form the inside.
It is also worth remembering that insurance companies do not presently favour one type of window over another. This is also worth mentioning to your customers when selling windows. Unfortunately we are unable to see visitors at our offices. You are welcome to get in touch via our contact form or by email from our contact page.
Skip to primary navigation Skip to main content Skip to primary sidebar Skip to footer If your window company presently sells a lot of PVCu windows and you are interested in selling more aluminium, how can you teach your salespeople to accurately explain about aluminium windows when compared to PVCu? Most aluminium windows fitted to residential properties will be externally beaded. An externally beaded window where the bead is locked into the profile by the internal wedge gasket and cannot be removed.
Published on July 28, and updated on June 15, Contact us. Latest Posts Alitherm Heritage windows review October 29, How slide and turn doors are better than bifolds September 14, New Cortizo bifold doors explained August 26, We use cookies to optimise our website and our service. The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
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