Derby RM2S* – Thermally rated

Thermally Rated Range

Oak Derby Part L Door for PM Mendes

Superior engineered construction with 18mm solid oak lippings and a thick face veneer. The door has an overall thermal rating U value of 1.7; the glazed units have feature design “K” glass and are argon gas filled. This door must be fully protected from rain and direct sunlight by a porch, recess or overhang. Supplied unfinished. Oak frame kits and sidelights to suit are also available.


Standard 44mm
1981 x 838 (33″)

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Thermally Rated Range

Manufactured to the same high quality standards as our Standard External Oak doors, this range of doors have thermal ratings as specified. The ratings are achieved primarily by inserting a special insulating membrane within the panels, which are correspondingly thicker than normal, and also with the use of Argon gas filled K glass units. This also gives an additional benefit in the reduction in sound transmission. It is essential that any External door, but particularly Oak, is protected from exposure to rain and direct sunlight by a porch, recess or overhang. If this precaution is not observed, the performance and appearance of the door will not be satisfactory.