Of clearance from class b flues 2 in.
How to seal an attic opening.
The opening around a furnace or water heater flue is a major source of warm air into the attic photo 5.
Insulate the cover with rigid foam that is glued in place or batt insulation that is mechanically fastened e g with wires and screws.
Because the pipe gets hot building codes require 1 in.
Small attic vents located below the roof peaks provide sufficient ventilation to let the moisture created by heat rising into the attic escape.
Air seal attic access panels and drop down stairs to minimize air leakage.
Finish up by sealing the access hatch with self sticking weather stripping.
We are going to show you step by step in less than 2 and 1.
If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening.
These new wood stops provide a larger area for attaching new weatherstripping.
From masonry chimneys to any combustible material including insulation.
Install a gasket around attic access openings to air seal between the opening and the panel covering.
Ever wonder how much your attic entrance costs you each month in your cooling and heating bills.
Sealing the attic hatch or door.
The large vent opening allows the heat to rise and.