Not every Langley attic needs a full removal before a blown-in upgrade — and not every attic is safe to top up without removing what is already there. If existing insulation is dry, mold-free, and pest-free, adding blown-in over it is the right and most cost-effective approach. If it is mold-affected, pest-contaminated, or contains vermiculite, professional removal must come first. Western Insulation inspects every Langley attic before recommending scope — so you get the right project at the right cost. Full decision guide at westerninsulation.ca/attic-insulation/