The BRegs, and specifically B3 Section 2 Internal Fire Spread (Linings) B3 Section 3 Internal Fire Spread (Structure) B3 Section 5 Compartmentalisation B3 Section 6 Cavities B3 Section 7 Protection of openings and fire-stopping have an impact on the construction detailing within the house.  As a self-builder my aims are twofold: (i) to keep my Building Inspector on my side and happy to sign off our build as complying; (ii) to do the right thing in sensibl