# The Building Regulations (Northern Ireland) 2012, Regulation 24: Urea formaldehyde foam


(1) Subject to paragraph (2), in-situ foamed urea formaldehyde shall not be used in the erection, structural alteration or extension of a building.
(2) In-situ foamed urea formaldehyde may be used for filling the cavity of a cavity wall having an inner leaf constructed of bricks or blocks, provided that it is—
(a) suitable for such an application; and
(b) satisfactorily installed.

---
Source: https://www.legislation.gov.uk/nisr/2012/192/regulation/24 (the official version)
Page: https://openlegislation.uk/building-regulations-northern-ireland-2012/regulation-24
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.