1.Will it work well for the next 20-25 years? This must be the average life span of any good quality double glazing window which has been installed equally well. <\/p>\n\n\n\n

2.Have you checked multiple quotes or are you relying on a single vendor blindly? Well, it is always better if you compare double glazing companies and then come to a conclusion. <\/p>\n\n\n\n

3.Have you checked their credentials? Are they qualified? Are they certified? For example, you can check a FENSA or CERTASS registration, they must carry at least one, or something alike. <\/p>\n\n\n\n

4.When you compare double glazing companies, it is common that they\u2019ll confuse you into the nitty-gritties so as to churn some extra cash from you. Make sure they are ready to promise everything in detail, and in writing, before you pay them. <\/p>\n\n\n\n

5.What must you do besides this to compare double glazing companies? Check their rating. Check the reviews. It is a very important element when deciding on the credibility of any vendor, many-a-times you can easily pick up loose pieces of information from such reviews that can save you a lot of unwanted hassle.<\/p>\n\n\n\n