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.
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