A new Insulation Contact (IC) rated pot light in a new home. The unperforated box gives the impression its air tight… don’t be fooled!
Below is a short video detail of a pot light in a 100 year old home that underwent a Deep Energy Retrofit. This pot light was on the top floor of a house in a flat roof assembly. The roof was spray foamed with 2LBS foam – both the air barrier and the insulation.
The insulation is effective, but the air leakage is substantial and short circuit’s the foam’s good intentions. The video below shows a detail of what happens when a house is depressurised to 30 pascals and just how great the potential for heat loss, but so too the possibility of moisture migrating into the roof assembly and causing mold or structural damage.
Test your spray foam! Test it before the drywall goes on.