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Use in cavity walls with formaldehyde fumes
3.2NI-wide·Technical Booklet B Materials and Workmanship
Foam insulating materials which give off formaldehyde fumes either when used or later in normal use, may be used to insulate the cavity in a cavity wall where there is a continuous barrier which will
energyConditions for insulating suitable cavity walls with urea formaldehyde foam
3.3NI-wide·Technical Booklet B Materials and Workmanship
A cavity wall which has been determined to be suitable for foam filling may be insulated with urea formaldehyde foam where – (a) the inner leaf of the wall is built of masonry (bricks or blocks); (b)
energy