Breathing Room: Solutions for Attawapiskat is an examination of the problem of mould growth in conventionally stud-framed residential buildings in Attawapiskat, Ontario; it proposes solutions using resistant wood-based wall...
moreBreathing Room: Solutions for Attawapiskat is an examination of the problem of mould growth in conventionally stud-framed residential buildings in Attawapiskat, Ontario; it proposes solutions using resistant wood-based wall assemblies in construction. The background research is from primary and secondary data sources, and forms the basis of selection for the suggested solution wall assemblies.
A practical experiment of six weeks duration was used to test a standard 2” x 6” stud-framed wall, a CLT (cross-laminated timber) wall, SIPs (structural insulated panel) wall, and a NDW (wood- fibre) panel wall. These walls were assembled into a small shed measuring approximately 4’x4’x4’, mounted on an insulated 2” x 6” stud-framed base, and covered with an insulated 2” x 6” stud-framed roof. The roof was finished with asphalt shingles, and the exterior walls were covered in aluminum siding. A lamp and a hot-water vaporizer were mounted inside the shed to provide heat and humidity, and both were cycled on/off at 8-12 hour periods. The experiment subjected the selected walls to extremes of humidity with adequate warmth in order to accelerate mould growth.
The final results show that both the NDW wall and the CLT wall had similarly low mould growth by area, and low concentrations of mould where seen. However, although the CLT wall showed most of its mould growth within the first three weeks of testing, the NDW wall did not develop growth until after the three week inspection. Because of this resistance to initial growth, the NDW wall is recommended for future residential construction in Attawapiskat, and other comparable communities.