Building advice

Insulation guides for Northern Ireland

Everything we have written about insulation, priced and researched for Belfast and the rest of Northern Ireland.

Insulation 25 Jun 2026 · 8 min read

Loft Insulation in Northern Ireland - Depths, U-values and Savings

How deep loft insulation should be in NI, the U-value it gets you, and an honest calculation of what it saves on an oil-heated house. With the sums shown.

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Know the number before you ring a builder

Reading is one thing. Put your own dimensions into a calculator, get a costed range with every line broken out, then ask three local builders to price the same specification.

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