When it comes to wall insulation for existing Langley homes, two methods are commonly used: dense-pack blown-in insulation and closed-cell spray foam. Dense-pack cellulose or fibreglass fills the entire wall cavity through small drilled holes without removing drywall, achieving R-13 to R-22 depending on wall depth, and it also adds meaningful soundproofing as a side benefit. Spray foam offers R-6 to R-7 per inch while acting as an air and vapour barrier, which can suit walls with moisture history or limited cavity depth. Western Insulation inspects your Langley home before recommending a method. Read the full comparison in our wall insulation guide for Langley homeowners: https://westerninsulation.ca/wall-insulation-langley-bc/