Access Doors and Hatches

Select sealants that:

are compatible with their intended surfaces,

allow for differential expansion and contraction between dissimilar materials,

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers), and

for use inside the pressure boundary select low volatile organic compound (VOC) sealants that meet independent testing and verification protocols

Select materials that:

adequately support applied load and are permanent air barriers,

meet the requirements of the applicable fire safety code (e.g. thermal or ignition barriers), and

for use inside the pressure boundary select low volatile organic compound (VOC) materials that meet independent testing and verification protocols

Remove any material from the sealing area that will prevent full adhesion of the selected sealant

Apply a continuous seal at all seams, cracks, joints, and edges of access framing while applying sufficient pressure to push sealant into any gaps or cracks and contact any backing or infill material required

Seal access using gaskets, weather stripping or equivalent method

Permanently attach gaskets, weatherstripping, etc. per manufacturer's instructions

Secure attic door or hatch with a latch, lock or frictionally engaging components

Install a rigid and durable dam having a height greater than the insulation at attic opening and does not interfere with the operation of the access

Insulate access to the same R-value as adjoining insulated assembly

Permanently fasten insulation to access in complete contact with the air barrier

Completed measure will have a minimum expected service life of 20 years