Urea formaldehyde (UF) foam is Bad

[Mcpherson]

Why do we use insulation such as Urea formaldehyde (UF) foam if its bad for you? Surely it should be banned?

[Buildthehouse]

The building regulations stipulate within document D1 that insulating materials which release formaldehyde can be used but only when there is a continuous barrier between the cavity and the habitable space. There are a number of codes of practice and British Standards mentioned which you may want to familiarise yourself with

BS 8208-1:1985 - Guide to assessment of sustainability of external cavity walls for filling with thermal insulants
BS 5617:1985 - Specification for urea formaldehyde foam systems suitable for thermal insulation of cavity walls with masonry or concrete
BS 5618:1985 Code of practice for thermal insulation of cavity walls by filling with UF