Are you registered with FENSA and a member of a trade organisation such as the FMB?

How long have you been manufacturing and/or installing windows?

If you just install, which window manufacturers do you tend to work with?

Do you provide replacement windows for period properties?

What styles do you specialise in?

Where can I read references from previous clients?

What level of service will you provide?

What choice of materials do I have for my budget and which type of window would be your recommendation?

Is that type of window CE marked?

What are the WER (window energy rating) and U-value of this type of window?

Do you have a showroom nearby where I can take a closer look?

What is the most difficult part of this project and how will you tackle that?

Who will actually be carrying out the work and are they fully qualified?

Will you be using sub-contractors?

Will all workers be covered by public liability insurance and employer's’ liability insurance?

Is your written quote fixed and inclusive of all labour, materials and VAT?

Please can we agree a start and completion date and discuss what happens if the completion is delayed?

How much disruption and mess will there be?

Is a deposit required and, if so, is it protected by an Insurance Backed Guarantee?

Is the work covered by guarantee or warranty?

Will you repair faults without charge if they occur and be on hand to provide aftercare?

Who will be my main point of contact after the job is completed?