Bang bang bang! That's the first clue that the heat is on at home. The hammering in the old radiator pipes is the startling signal that our steam radiators are heating the room. What can be done about that noise? Our building has always advised to open or close the radiators' valves all the way - don't try to modulate the heat by turning the valves to a middle-ground...We recently found much more help at House in Progress. Apparently, these homeowners were dealing with common hammering in their steam radiators and took the matter into their own hands, doing a little simple maintenance work with the help of This Old House. One particularly easy thing they did was shim the feet of the radiator furthest from the pipe that carries water back into the system. This assures water is not trapped in the system.
See more in this video, "Maintaining a Steam Radiator", from This Old House. Do AT readers have any other tips for clanking steam radiators?