How To Seal An Attic Opening

Of clearance from class b flues 2 in.

How to seal an attic opening.

Because the pipe gets hot building codes require 1 in. Air seal attic access panels and drop down stairs to minimize air leakage. If the attic hatch rests on the molding you should add 2 1 2 inch stops around the entire opening. Sealing the attic hatch or door.

Ever wonder how much your attic entrance costs you each month in your cooling and heating bills. The opening around a furnace or water heater flue is a major source of warm air into the attic photo 5. We are going to show you step by step in less than 2 and 1. Insulate the cover with rigid foam that is glued in place or batt insulation that is mechanically fastened e g with wires and screws.

The stops provide a wider surface for attaching the weatherstrip and a space to mount hook and eye fasteners. The large vent opening allows the heat to rise and. These new wood stops provide a larger area for attaching new weatherstripping. They also give you an easy area to add hook fasteners if needed.

Install a gasket around attic access openings to air seal between the opening and the panel covering. If your hatch rests directly on the moldings add 2 1 2 inch wide stops around the opening.