How To Seal An Attic Opening

Install a gasket around attic access openings to air seal between the opening and the panel covering.

How to seal an attic opening.

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. Of clearance from class b flues 2 in. If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening.

The opening around a furnace or water heater flue is a major source of warm air into the attic photo 5. Finish up by sealing the access hatch with self sticking weather stripping. They also give you an easy area to add hook fasteners if needed. These new wood stops provide a larger area for attaching new weatherstripping.

Small attic vents located below the roof peaks provide sufficient ventilation to let the moisture created by heat rising into the attic escape. Ever wonder how much your attic entrance costs you each month in your cooling and heating bills. From masonry chimneys to any combustible material including insulation. We are going to show you step by step in less than 2 and 1.

The stops provide a wider surface for attaching the weatherstrip and a space to mount hook and eye fasteners. If the attic hatch rests on the molding you should add 2 1 2 inch stops around the entire opening.