Thermally insulated, fire resistant attic door

DETAILED DESCRIPTION The present invention provides an improved, flame-resistant, thermal insulating door which may be mounted, in association with a folding ladder or stairs, within a framed ceiling opening.
The door comprises a generally open, marginal support frame which contains and supports within its confines one or more layers of a non-combustible thermal insulating material, such as glass fiber-reinforced urethane foam, and an outer panel of flame-resistant plaster (gypsum) board carried on and completely covering the outer face of the support frame and the insulating material.
The outer side and end edges of the support frame are also covered with strips of flexible, flame resistant, fibrous glass insulation arranged to fill any gaps between the outer marginal edges of the door and the associated door frame, and a metal trim strip is also carried on the marginal edges of the door in position to overlap and cover any gaps or clearance spaces between the edges of the door and the door frame when the door occupies a closed position.
The primary object of the present invention is to provide a ceiling-mounted attic or trap door which is attractive in appearance, but which provides an efficient fire-resistive and thermal insulating barrier between the lower living quarters and the attic or upper storage area of a dwelling.