Can I fit a garage door myself, or supply my own?

The two things that catch DIY fitters out are measurement conventions — each door type is sized differently against the opening, which is how doors end up ordered wrong — and spring tension, which is the one job we tell everyone, without exception, to leave alone. Our spring guide explains why.

There is also the paperwork: manufacturer warranties assume correct installation, and a professionally fitted door comes with our 5 year parts and labour guarantee behind it. A professional single-door fit takes three to six hours; the sizes guide shows what the measuring involves if you want to understand the job before the survey.