Down-lights and Loft Insulation together in the ceiling to the loft are a source of heat loss for home owners and of-course concern of how to treat these thermally weak light fittings. The Downlight Attic Seal is a quality product developed to resolve these problems.
The illustration below shows how most downlights in attic ceilings are treated and as a consequence the easy path for draughts and heat-loss.
As can be seen the loft insulation should be kept away from untreated downlights.
Loft insulation is not continuous and will leave the ceiling weak in the fight against heat-loss.
Each downlight can pass 20 cubic meters per hour of conditioned (heated) air from living area to attic (at 50pa pressure), this is energy and heat loss.