I ve heard that the plaster is actually porous enough that it needs to be sealed with plastic or something.
Plaster repair material for air sealing attic.
Press the flashing metal into a bead of latex caulk and staple it into place.
The opening around a furnace or water heater flue is a major source of warm air into the attic photo 5.
Three coats of wet plaster are applied in layers to the lath.
Roll a piece of fiberglass batt and stuff it into place at the top of the wall where the top plate is missing.
Figure 5 the fiberglass roll is covered with spray foam to air seal the top of the wall.
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To reduce air flow a homeowner will first need to air seal.
Skip air sealing and expect to pay big many people overlook the need to air seal because they look around their house and see walls and ceilings that do not have holes to the attic or outside.
I have an 1850 house upstate ny the ceiling right now is just lathe and plaster and the attic has no insulation.
If there s no wood staple it right to the drywall.
The scratch coat the brown coat and the finish coat.
What most people don t realize is that all winter long they are heating the space behind.
Fill the attic with additional insulation.