Brilliant service. My fitter did not show up on the day as he had a headache and so I called Permagard. They helped me with fitting instructions and so I installed it with my labourer. Without doubt I did a better job. It was easy and on top of which I saved myself £300.00 and a lot less stress as well. I do hope my fitters headache is better because mine went away as soon as I spoke to Permagard. I was spitting with rage to be honest to let me down at the last moment but clearly it all ended up somewhat better. So if you want to DIY using Permagard then you can. If I can do it anyone can!