Best Attic & Cavity Insulation in Co. Antrim
Ranked by Google ratings — updated 25 October 2026
As of 25 October 2026, LocallyIrish.ie ranks 5 attic & cavity insulation in Co. Antrim by customer rating. The top-rated is Clever Insulation Belfast - Loft Insulation Northern Ireland - Affordable Warmth Scheme Approved, with 5.0 stars from 84 Google ratings. One Step Insulation Ltd follows with 5.0 from 63 Google ratings.
How we rank
Each business is scored on its average rating weighted by how many ratings it has, so a handful of perfect scores cannot outrank hundreds of near-perfect ones. Reviews left on LocallyIrish.ie and the business's Google rating are counted together; the rating shown on each entry is labelled with its source. A Google rating needs at least 5 ratings to count. Businesses without enough ratings are listed separately, unranked. Paid listings cannot buy a higher position. The list refreshes hourly.
Clever Insulation Belfast - Loft Insulation Northern Ireland
Gold · 2026 Top RatedOne Step Insulation Ltd
Silver · 2026 Top RatedCertainfil Cavity Insulation
Bronze · 2026 Top RatedNorthern Loft Insulation Ltd
Energystore Ltd
Also in Co. Antrim — not enough ratings to rank yet
Best attic & cavity insulation by town
Best attic & cavity insulation in Antrim — FAQs
What is the best attic & cavity insulation in Antrim?
Clever Insulation Belfast - Loft Insulation Northern Ireland - Affordable Warmth Scheme Approved is currently the top-rated attic & cavity insulation in Co. Antrim, with 5.0 stars from 84 Google ratings. See the full ranked list above.
How are the best attic & cavity insulation in Antrim ranked?
Each business is scored on its average rating weighted by how many ratings it has, so a handful of perfect scores cannot outrank hundreds of near-perfect ones. Reviews left on LocallyIrish.ie and the business's Google rating are counted together; the rating shown on each entry is labelled with its source. A Google rating needs at least 5 ratings to count. Businesses without enough ratings are listed separately, unranked. Paid listings cannot buy a higher position. The list refreshes hourly.
How can my attic & cavity insulation business rank higher in Antrim?
Encourage happy customers to leave a review on your LocallyIrish.ie listing. More high-star reviews move you up the "Best of" ranking for Co. Antrim.
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