Professional, thorough, always available for assistance and absolutely invaluable for the inexperienced house builder looking for a complete design and installation service for home insulation and MVHR amongst other things. I've read a scary number of reviews that say 'not the cheapest, but...' for SolarCrest and whilst it's absolutely true they aren't the cheapest, the question has to be asked - why would you WANT to employ the cheapest? What discernible value do you get by bringing in the cheapest and having the cheapest done? You don't. The kind of service SolarCrest provide is NEVER going to compare well to a Google search and anecdotal nonsense on Facebook groups. It's not meant to. Solarcrest are a well-established service provider who command a higher going rate than most other outfits because they provide a higher quality service than most other outfits. Don't underestimate the number of hours required to reach even a basic level of understanding of the whole process of designing and installing a thermal envelope for your house that will perform the way it's been designed to, all the while interfacing with building control, contractors, and you the client. Everything has a cost - for every minute you spend with your head in the latest building control regulations or a product review for some machinery going into your house, for every page you turn of yet another case study, it all costs you time and time really is money. Divide your salary by 2000 to get your hourly rate and then count up how many hours and therefore much it costs you to achieve that basic level of understanding to give you confidence enough to start making decisions. It all adds up and these guys can provide added value by helping you make decisions faster. When installation time comes you will be relieved and impressed in equal measure - Solarcrest's guys get things done quickly, efficiently, and expertly. Feedback is prompt, niggles and snags sorted swiftly, the job left behind will do what you wanted it to and provide evidence you made a wise decision when you commissioned them.