Scarborough has a large stock of mid-century bungalows, semis and split-level houses, many with finished basements and some with separate basement apartments. Higher-density condominiums have grown up around Scarborough Town Centre and the transit corridors, while Highway 401, Kingston Road and the GO Lakeshore East and Stouffville lines run through the district. In all of these, the practical question is the same: which surfaces are carrying the noise?
Scarborough houses from the post-war decades often have lightweight floor assemblies, open joist bays and hollow walls, so footsteps and voices carry more easily than in newer construction. Checking what is inside the walls and ceilings before specifying work avoids paying for upgrades that will not help.