Sistering is the process of adding a new joist next to each existing joist.
Attics joists creak and pop.
Metal roofs are major offenders but shingled roofs also can be quite noisy.
If your house is giving you the creeps because of popping noises from inside the walls and up in the attic you can probably chalk it up to something other than spirits from beyond the grave.
If the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists.
In the case of 2x6 joists you can pair them up with additional 2x6 joists by nailing them together side by side.
How to build attic flooring on joists.
Often minimal live load requirements are four times that of dead loads.
All attics joists can carry a minimal dead load weight i e 10 pounds per square foot.
Further the carpenter may need to add nails or reset them shim shore add joists or rafters rebrace etc any or all of these methods might indeed pull it off and get rid of the unwanted noise.
If your attic already has insulation it is probably useless for your intended attic remodel.
Read to learn more.
Popping is a common way to describe a variety of noises that a house makes and the causes are varied.
In older home attics unsettling bangs are more likely to be the sounds of trusses joists rafters and sheathing expanding or contracting as the roof heats up or cools down.