Would have given 0 stars if an option. Avoid like the plague! 1st Glass UK are incompetent cowboys who will not turn up when expected and if and when they do will then do a very poor job. They also lie and/or completely ignore you. We are now 1 year into a complaint which was only acknowledged once we involved the finance company. They are also reluctant to provide FENSA certificates. We had to pay for an independent company (RISA) to inspect our windows and doors and provide a report at a cost of £480. Numerous very basic but catastrophic installation faults found (no drianage points, huge gaps, windows not sealed at all, doors letting in horrendous drafts) and windows and doors not compliant with FENSA Regs. This company do not care and are completely incompetent. Be warned and take your business elsewhere.