Finding insulative materials which are both cost effective and good for the environment can be difficult when you go through traditional avenues, i.e speaking to a building contractor, but by looking around for yourself for your own building materials, you can find a number of options which fit this description precisely.
Fibreglass has become the traditional insulation material, and the go-to resource for builders. previously, natural materials like hay bales and rolls of wool have been used, and are often found to be just as effective. Not only are they just as effective, but you can rest easy knowing that you’re using renewable materials, which don’t have polluting extraction and production process.
Going to a traditional builder can mean you’re unlikely to get natural building materials, so it is a good option to search online for a builder who specialises in green building projects. They will be your best bet for getting environmentally friendly building materials.