I am very satisfied with the work produced by Solarcrest. I had a sizeable area of roof space insulated with two types of spray foam + a double unit MVHR system installed too. The alternative of insulating with boards and tape would have taken forever and would have been less thermally efficient too. Our build was a conversion from commercial to residential so the spray foam not only insulates extremely well but it covers over/in redundant cables, pipes and other inherited items that would have been an obstacle to be removed if we had boarded the roof space. The MVHR has just been commissioned and needs time for me to evaluate its effectiveness but insofar as the installation goes all is looking good to me. I would certainly recommend this method and company.