I would appreciate some advice on the following matter, I am in dispute with a glazing company X that fitted my extension bifolding doors at incorrect floor level, end of last year. The doors come from a reputable factory and are of high quality. The cost of the job was not at all small and the balance was paid in full before the issue became apparent. Certificates and guarantees have been provided. When their surveyor turned up to measure, the screed had not been laid down yet in the extension. He argued that the finished floor level had to be provided and requested a sign off as a condition of the contract. This was liaised with the building contractor who provided the final floor level datum with a laser cross level, based on the existing house floors. I have learnt this is not something uncommon in construction due to the stages of work. It is important to note that the company did not refuse to undertake the work, it only set a condition as it was clearly requested the weather track had to be flush with the floors. Company X put everything on email, including heights of the weather track, screed and floor thickness etc providing four digit millimetre precision measurements for signing. Everything was noted with reference to the fixed support lintel of the opening. After double checking this with the building contractor it was signed off in good faith. Eventually the screed and tiles got in place and it became apparent the weather track was offset higher by about 14mm from the agreed floor level. Thus a 4 meter opening is now showing a nearly 20mm lip sticking out from the last tile. I revisited all measurements with high precision from multiple points of reference against the information provided on the order. Company X provided no plans or drawings for the system itself. There is absolutely no doubt from my end that the doors have been fitted higher by at least 14mm against the agreed floor levels on contract. It is also possible the doors were designed shorter. To make the really long story short, I contacted Company X several times and requested they come out to survey their work. They argued everything was fitted as agreed and blamed the builder. Emails and calls were never returned for weeks. I asked them to provide all the measurements for the door system but it was completely ignored. That was about 3 months ago. I expected they would at least come out to check the work, but that never happened which raised a lot of suspicions. To my understanding this is breach of contract, something they in fact requested to sign off. I decided to give the situation a last chance, submitting the case to the GGF of which they are members. I wrote to their conciliation scheme and sent a all the communications with the company, contract details etc. Company X replied in the same tone at first, "we don't understand why you went to the GGF, everything was done right, there was no screed" etc. The GGF allowed their member 21 days to respond, which the company ignored. Once the deadline passed, I complained that no consideration or reply was provided. The member was given a 14 day notice as part of the scheme, that I could not justify. On the last day of the extended period there was a three line response at about 6pm. Again, pointing out that heights were provided to them, there was no screed etc. They even attached the same contract that I had already forwarded to the GGF. On the last line they add they are willing to come out on site and "if the doors can be lowered" they will do this as "good will". All the building damages to be covered on my end! Full of empty words, they are covering up a cock up with a "good will" proposition while suggesting leaving me cover serious damages to a new building. I wrote back asking that the member submits the door plans requested 3 months ago. The GGF, that merely facilitates the communication and not examining the merits of the case replied, "Please be advised that our Member is simply required to satisfy your contract with them as agreed and signed for" This is not acceptable, although we are prepared to consider compensation we cannot accept this as "resolution". The company failed to inspect the work against the agreed heights and I cannot accept additional damages as a result of their negligence. Patience is running thin, the GGF have an arbitration scheme as a next step but I am not confident of their impartiality. I am also not going to let this company walk away, they acted really unprofessionally, they were given the opportunity to check their work and chose to repeatedly ignore it until I had to escalate the matter. I am now considering a two step proposal, a. they either take full responsibility for the work and damages to the building or, b. compensation reflecting the cost of bringing the work to the standard it should be as in the contract or taking to small claims to recover the cost. This will require a surveyor/expert witness involved which will obviously incur costs. Apologies for the long post Any thoughts are welcome!