You can feel it on the first floor and second floor.
Loud thud in the attic.
If it s not what paul ward said water hammer which usually occurs when a water valve abruptly shuts off then it s probably temperature change in the attic.
It is unrelated to plumbing usage or to start and stop of hot water heating system.
A loose shutter on an attic window or loosened attic vents can cause a banging sound if it s windy as can branches hitting the roof.
No that s not the sound of chains rattling in the attic.
If you hear thumping in your attic at night it s most likely a larger animal such as a raccoon or opossum engaged in jumping from one area of the attic to another actively shoving or destroying something or dragging something heavy.
Sometimes two or three in a row a few minutes apart.
If nothing obvious turns up you ll need to hire a roofer to look for a loose vent cap on the roof or a piece of flashing that s moving and transmitting the noise down through a rafter and into the.
Heating ducts as they cool also make banging noises as do.
If it s the fall or.
It happens irregularly almost like someone dropped a heavy weight or fell and the house shakes a bit.