Roof spaces are among the least glamorous parts of a house, and among the most revealing. Dark, dusty and rarely visited, they hold clues about leaks, structure, insulation, wiring and even pests that no amount of interior styling can hide. That is why inspectors spend time up there, torch in hand, whenever access is safe.
Entry is usually through a ceiling hatch, often in a hallway or wardrobe. If there is no hatch, or the space is too low or cluttered to move through, the inspector will note it as a limitation and the assessment will be less complete as a result.
What gets checked up there
- Water staining and leaks. Dark marks on framing, sarking or the back of the ceiling lining point to past or current leaks, often around flashings, flues, skylights or valleys.
- Framing and structure. Rafters, purlins and trusses are checked for sagging, cracking, poor alterations or missing bracing. Members cut or removed during past renovations are a common concern.
- Insulation. Inspectors look at whether it is present, how thick it is, whether coverage is even, and whether it has been compressed or pushed aside by people moving around.
- Ventilation. Bathroom and kitchen fans should vent outside rather than discharging warm, moist air into the roof space, where condensation can lead to mould and rot.
- Electrical concerns. Old cabling, loose junctions and downlights without enough clearance from insulation can all be flagged for an electrician to review.
- Borer and decay. Exit holes or soft timber are noted, particularly in older homes.
- Pests. Droppings, nesting material or chewed cables suggest rats, mice, possums or birds have found a way in.
- The underside of the roof. Rusted fixings, daylight where there shouldn’t be any, or condensation on the underside of metal roofing can all be visible from inside.
Not every issue spotted up there is serious. An old stain beneath a flashing that has since been repaired may be historical. A missing patch of insulation is cheap to fix. Others, such as a structural member cut to make room for a pipe, or an extractor fan blowing straight into the space, need correcting.
What happens inside the roof space is only half the picture. From outside, the inspector will usually assess the roof cladding itself, whether that is long-run steel, corrugated iron, concrete tiles, pressed metal tiles or a membrane, along with ridges, valleys, flashings, spouting and downpipes. Whether the roof can be walked on depends on its pitch, material and condition. Where it cannot, a ladder at the eaves, a camera on a pole or a drone may be used instead, and the report should say which method was used.
Some roof spaces also hold older items worth knowing about: a header tank for a low-pressure hot water system, abandoned flues, or loose-fill insulation of uncertain age. None of these is automatically a problem, but each tells a story about how the house has changed over time.
Anyone reading a building report should look for the inspector’s comments on this area and whether it was fully entered, partly viewed or not accessed at all, since that affects how much weight the overall findings can carry. A quick word with the inspector can clear up anything that seems ambiguous.