BC Building Code requires a minimum of R-40 to R-50 in attic assemblies for Climate Zone 4 — which covers all of Langley, Surrey, Burnaby, and the Fraser Valley. Most Langley homes built before 2000 fall well below this standard, with attic insulation commonly sitting between R-12 and R-30. The gap between what these homes have and what current code requires is measured directly in monthly energy costs and uncomfortable temperature differentials on top floors every winter. Western Insulation's free attic assessment confirms your R-value against current BC code. Book at westerninsulation.ca/attic-insulation/