Yes certainly, we will to provide you with a fixed price on quotation so there are no surprises at the end of the project. However, where unforeseen circumstances occur during a project and extra work needs to be carried out we will immediately inform you and discuss any additional costs with you.
Yes we work seven days a week where necessary, we also work long hours if it needed to get the job done quickly for you.
It's upto you, if you like you can use us purely as a labour service.  Alternatively we are happy to provide materials for you. All materials supplied by us will be itemised on your invoice.
Yes we have full public liability insurance.
It is highly unlikely but if that did happen we would return and repair it free of charge.