Just like you should be keen when purchasing your windows, you have to make sure you have covered all bases when deciding who will do the installation work. When the windows are not installed correctly air seepage will be a real problem and energy efficiency will be an issue as well. No one is going to compensate you for any shortcomings on the performance of the window when you did not follow the term and conditions laid out in the warranty document. You have to find the right contractor to do the job. Figure out the kind of windows you will install because this is the first step in selecting a qualified professional to do the job. The research should be done in good time so that when you are conducting the interview you will know what to get. You might be hurrying to complete the project but this does not mean you have to choose a candidate because they have knocked on your door. Do not stop looking for contractors because the first person you have met has offered you a deal you think you might not get anywhere else because chances are you might find an even better one which is why you need bids from other contractors.
There is more to bid than the price. You need to know the kind of materials and products the contractor will be using and if the money for labor and materials will be coming from your pocket or from theirs. You also need to know how long the installation will be going on with specific dates has to go in the bid. With specified bids, nothing is left hanging which mean the possibility of conflicts arising in the future is low given that no one can say the terms and condition where misunderstood. The payment terms have to be discussed in the bid. Do not agree into paying the entire bill before you satisfied with the work done.
This kind of work requires a contract and you need to comprehend every clause before you put your signature down. A lot of windows break down because of installation shortcomings which is why you ought to insist on getting 10 years of warranty for the workmanship. Knowing the traits and skills of a professional before you spend your money on them is crucial and for total strangers, you have to insist on getting references. It is not the reference of the contractor you have to check but also for the window products supplier. The contractor should have a portfolio not to forget narrating to you the history of the business including the number of years they have been in service.