1.7r is a closed cell, HFC-245 blown, zero ozone depleting spray polyurethane foam insulation system. It is an all-in-one high performing insulation system that provides incredible air sealing, and can reduce heating and cooling costs by as much as 50% each month.  It could even allow you to reduce the size of heating and cooling system required. This foam uses a proprietary non-processed polyol system, and contains the highest content of renewable resource based materials. It custom seals around T’s, headers and corners to eliminate drafts, dust, and can pay for itself through energy savings and your home’s increased value.