Fire has spread between the walls in climate-smart wooden modular houses, which has led to excessive damages. The Swedish National Board of Housing, Building and Planning now intends to change its rules so that it will not be permitted to build houses in such a way that fire can spread in hidden spaces. However, the new rules will not apply to houses that have already been constructed. Some insurance companies are now hesitating to insure wooden houses of this kind, due to the fire risk. Time will tell whether the revised building regulations will result in less extensive fires.

[With thanks to Nordia for submitting this prediction.]