Advice
What Happens During a Loft Survey
A loft survey checks depth, condition, moisture and ventilation, then ends in a clear written recommendation. Here is a step-by-step walk through what to expect.
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Loft Insulation Advice
Clear answers to the questions homeowners ask us most — written in plain British English and reviewed by our technical team.
Advice
Signs Your Loft Insulation Needs Replacing
Damp, mould, pest evidence, compression, unevenness and simple age are the main signs that loft insulation needs replacing rather than topping up. Here is what to look for.
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How Much Loft Insulation Do I Need?
For wool-based loft-floor insulation, 270mm is the widely used benchmark. Here is where that figure comes from, how to check what you already have, and when more is worth it.
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Can You Board Over Loft Insulation?
You can — but only with a raised system that keeps the boards clear of the wool. Laying boards straight onto the joists crushes the insulation and wastes it.
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Multifoil vs Wool Insulation
Multifoil and wool insulate lofts in different ways and different places — foil at the rafters, wool on the floor. Here is where each suits, and the limits of both.
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How Loft Ventilation Works
A plain-English guide to how air moves through a roof space — eaves vents, lap vents, breathable membranes and roofing felt — and why it keeps an insulated loft dry.
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Sheep Wool vs Mineral Wool Insulation
How natural sheep wool compares with mineral wool for a loft — breathability, cost, handling, older homes and treatment — and why sheep wool is no guarantee against condensation.
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When Should Old Loft Insulation Be Removed?
Most old insulation can simply be topped up, but some has to come out first. Here are the specific triggers that call for removal rather than adding more.
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Mineral Wool vs Recycled Plastic Insulation
A balanced look at two common loft-floor materials — how they compare on handling, cost, sustainability and performance, and which situations suit each.
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Can You Insulate Over Existing Loft Insulation?
In most cases yes — a fresh layer can be laid across sound, dry existing insulation. Here is when a top-up is fine and when the old material has to come out first.
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Loft Insulation and Condensation
Adding insulation makes a loft colder, which can raise condensation risk if airflow is poor. Here is how the two are linked and why insulation alone will not fix damp.
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Loft Insulation for Older Homes
Older roofs were often built to breathe, so insulating them well means thinking about breathability, natural materials, ventilation and a careful inspection first.
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