Opinions differ on insulating brick walls in an older historic property; in some cases it might cause more problems than it solves. It could be time to consider addressing insulation in other parts of the house to increase comfort and save energy. Expanded polystyrene (EPS) rigid foam sheets can be used to great effect when insulating both attics and crawlspaces. Prevent heat loss at both the top and bottom of the house with rigid foam insulation. For advice on the size and thickness of EPS sheets you need, give our foam experts a call at 410-498-0000.