- On the left is the old pine plank ceiling. This tends to make the room darker and look smaller because of the dark colour. By fitting ISOBOARD you immediately give the room light and insulation, remember 25 mm ISOBOARD has a R Value of .88. This is all done without tacking out your old ceiling, the board is fitted directly on the old ceiling the only difference is a slip sheet is applied to the board to prevent “squeaking”.
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