Photo Source: Summerhill

Sealing Electrical Boxes:

Leakage around electrical boxes may not seem significant, but because there are so many of them they add up quickly. Most electrical boxes on exterior walls and ceilings in new construction will already have some form of box or gasket system installed by the electricians. It is important to seal any holes where the wires enter the electrical box to reduce leakage. In renovation jobs it is likely that no system will be in place. In this case the client will need to contact an electrician to have a system installed.