The thump occurs several times a day usually in the evening.
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.
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.
If it s the fall or.
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.
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.
Heating ducts as they cool also make banging noises as do.
You can feel it on the first floor and second floor.
It is very loud on the first floor coming from different places on the ceiling not so loud on the second floor.
No that s not the sound of chains rattling in the attic.
It happens irregularly almost like someone dropped a heavy weight or fell and the house shakes a bit.