Our project is a two level porch approx. 14ft by 6 ft with a full foundation, due to proximity to the property line we were required to build this wall in block. We choose to use the spray application on the block walls to reduce the amount of wall space and batten that would be needed to obtain the required rating. Cost comparison was very close when loss of space and labor costs were included and I found all the representatives either in person or on-line to be helpful, courteous and well informed about the product they offer. The installation was completed on time and quickly and I would suggest that if you are looking for insulation to give them a call.