However there are many types of these windows and doors on the market today, so care has to be taken when purchasing that the ones you select are a quality brand. You will always be able to find more efficient windows out there than double glazed PVC doors or windows, if cost is not a factor.Double Glazing has some nice tips on this.
If however you have a budget to consider, then quality uPVC doors and windows are a cost effective option that should be an excellent choice.Many homeowners have older type, single glazed timber windows in their homes and these units are very easy to force for most burglars. Double glazed windows are more difficult to break through as double glazing itself is surprisingly strong and difficult to break, especially if you are trying to do it quietly.
uPVC doors have advanced locks fitted into the framework and this makes it even more difficult for thieves. Most thieves want easy targets and will often leave a home with secure windows and doors fitted in preference for one that does not. There are many varieties of doors and windows available. Many materials are also used in making of doors and windows and costing depends upon the material costs.