Snagging a First Home in Horncastle: The Fire-Safety Defect Hiding in the Loft

First-time buyers put everything into that first purchase — years of saving, months of paperwork, and no small amount of nerves. So when a young professional couple completed on a beautiful two-bedroom semi-detached new build in Horncastle, they did something more first-time buyers should do: before settling in, they commissioned an independent snagging survey.

Their thinking was simple. The house looked immaculate — new builds always do on handover day. But neither of them worked in construction, and they wanted a professional set of eyes over the property while the developer was still on the hook to put things right. As it turned out, that instinct paid for itself many times over.

As with almost every new build I inspect across Lincolnshire, the survey picked up the familiar catalogue of finish and workmanship items: decoration blemishes, sealant gaps, doors and windows needing adjustment, and minor external tidy-ups. Individually trivial; collectively worth recording, because a photographed, room-referenced schedule means the developer resolves the lot in one visit rather than through months of piecemeal complaints.

None of those items would have made this house a bad buy. But snagging surveys aren't really about paint. They're about the things you can't see from the show-home tour — and this house had one of them.

Few buyers ever put their head through the loft hatch. I always do — and in this case, the torch beam landed on the most significant defect in the property: the insulation over the party wall had been dislodged, leaving the top of the wall between the couple's home and their neighbour's exposed.

That matters far more than it sounds. In a pair of semi-detached houses, the party wall is a fire compartment wall — it is designed to stop fire and smoke passing from one home into the other. At roof level, that protection depends on the junction between the wall head and the roof being properly closed off, typically with tightly fitted mineral wool. Dislodge that material and you create a gap at the very top of the wall — a route through which smoke and flame can bypass the fire break entirely and spread into the neighbouring roof space.

It is a defect with no symptoms. It doesn't leak, creak, or show up on an EPC. The house looks and performs perfectly — right up until the one day the fire break is needed. And it's precisely the kind of item that gets disturbed late in a build, when trades are working in the loft after the insulation has been laid, and nobody goes back to check.

Fire compartmentation between dwellings isn't a nice-to-have — it's a fundamental requirement of the Building Regulations. A defect like this, documented with photographs and its location precisely recorded, goes into the developer-ready snag schedule as a priority item, clearly separated from cosmetic matters so it can't be lost in a list of paint touch-ups.

Reinstating the fire break is a quick, inexpensive job for the developer — a matter of refitting the insulation correctly over the wall head. The point is not the cost of the fix. The point is that without an inspection, nobody would ever have known it needed fixing.

This couple did everything right. They bought a genuinely good house from a mainstream developer — and they still benefited from an independent inspection, because build quality issues aren't about bad houses, they're about the last 5% of any build programme where corners get busy, schedules compress and details get missed.

A snagging survey costs a fraction of what buyers spend on a survey for a Victorian terrace, yet new build buyers routinely skip it on the logic that 'it's new, what could be wrong?' The answer, usually, is: dozens of small things and occasionally one that really matters.

I carry out independent new build snagging surveys in Horncastle and throughout Lincolnshire — Lincoln, Louth, Sleaford, Boston, Grantham, Spalding, Bourne, Skegness and the surrounding towns and villages. Every survey covers the loft, the externals and the details developers hope you won't look at, and every report is delivered as a photographed, developer-ready schedule.

If you're taking handover of a new home — especially your first — book the inspection before you complete if you can, or as soon as you have the keys. As this couple in Horncastle found, the most valuable item on the schedule is often the one you'd never have seen yourself.