Learn all about how much blown vs rolled vs spray insulation costs. Read general insulation prices, tips and get free insulation estimates. CostOwl.com.How much home insulation should cost. Average costs and comments from CostHelper’s team of professional journalists and community of users. In order to buy materials or talk to contractors, you need to determine what level of R value, or thermal resistance, you want to achieve in a givene..Eco Insulation Environmentally friendly sheep’s wool, gl.wool, polyester and sustainable products for the insulation of homes and commercial applications, Best value home insulation solution for insulation contractors in New Zealand, Absolutely Positively Wellington, Warm up Wellington, Wellington City Council, Air Conditioners, Heat Pumps .This page covers info on calculating blown in insulation cost for attic and wall projects. You will also find some info about different types of materials used..