Improvements relating to closure apparatus

摘要

An arrangement for releasably and sealing closing an aperture in a wall 5 (e.g. of a caravan) comprises a closure panel 4 and at least two frame members (2 and 3 or 6 and 7) adapted to be clamped about the periphery of the panel or of the apertured structure by clamping means; the frame members and clamping means forming a composite member which is provided with a sealing member 8 for releasing engaging with the panel or the periphery of the apertured structure and the clamping means (e.g. screws 19A and 19B) being embedded in the composite member so that the clamping means is isolated from the environment on one side of the structure to prevent cold-bridging.