I couldn't find a suitable wall in the house, but I have two attached garages. One is a 2-car, and that's where I park, but the other is a 1-car and I use it for storage. I got two insulation boards, covered them with heavy felt, and placed them against the garage wall, just above that footing that all garages seem to have. It's working out great, even though it means I have to carry my blocks downstairs and into the garage.