Designers worldwide are asking whether MCM material, or any wall cladding assemblies containing combustible material, should continue to be used on high-rise construction. Before any type of judgment is made, let’s review the facts behind the building fires that have been reported.
A Building Research Establishment (BRE) report summarizing the investigation into the deadly Grenfell Tower fire last year in London has been leaked, and several causes for the tragedy were identified. Each of the following excerpts from the report are linked to the online report.
Continuous insulation (ci) and cavity insulation products are both sold with R-value ratings, but the way these two products are used in wall construction means they do not have the same effectiveness.
NAHB members are particularly concerned about three suggested amendments that would add to the cost of construction without an accompanying benefit to the health and safety of the home owner – the stakeholders NAHB represents when they testify at these hearings.
The newest versions of IECC and ASHRAE Standard 90.1 call for one to four inches of exterior continuous insulation depending on the building location by climate zone, even in warmer zones where foam board insulation had not previously been required.