Remote roof data for stock condition surveys and planned maintenance

When the budget covers only some roof inspections each year, the order of the site visits matters. Without data, that order tends to follow complaints, age lists or habit.

HOMAI adds a desk-based first pass to the stock condition survey. For each building it reads the roof from up to seven aerial, satellite, street-level and LiDAR images, combines that with official building data and four climate exposures (flood, landslide, heavy precipitation and storm), and calculates a score with a risk band: low, medium or high. Buildings in the high band, and buildings where the data is uncertain, go to the top of the surveyor's list.

The result is a ranking you can explain to a management committee or to the board of a housing association (borettslag or sameie): every score shows the factors behind it and the source of each value.

HOMAI carries out a remote roof assessment for every building you add. The roof section of each report records what is visible in the imagery:

• roof type (gable, hip, flat, mansard, shed or complex), the number of roof planes and the pitch, cross-checked against LiDAR
• roofing material and overall condition
• visible defects
• the share of flat sections
• counts of chimneys, roof windows and vents
• visible drainage
• image quality, so you know how far to trust the reading

Together with the build year, historical imagery and the climate score, these observations feed the 10 roof risk factors. Roof age is handled with care: HOMAI does not estimate it from pictures. It uses the building's official build year (byggeår) from Kartverket's Matrikkelen as the proxy, and a separate factor looks for visible change in historical orthophotos without dating the roof. If a roof has been replaced since the building went up, the build year will not show it, so keep your own maintenance records next to the report.

Each report includes a maintenance plan section next to the executive summary and the recommendations. A text model drafts it from the observed roof facts and the official data, under strict rules: official values are used as published, anything that cannot be derived is marked "Not derivable", and estimates are prefixed with ~ and state their method.

Treat it as the roof input to your planned maintenance programme, not as the programme itself. This is how the report fields map to the work:

The report exports as an A4 PDF built from the same content as the screen version, and administrators choose which sections appear. That makes it easy to attach the relevant pages to a board paper or a request for roof work. HOMAI does not price the work: the report has no repair-cost or replacement-date estimates.

Add buildings one at a time by address search or a click on the map, or draw an area on the map. Administrators can also import a property list as CSV. Each analysed building becomes a pin on the map with its own history of analyses.

The portfolio view summarises the latest analyses: how many buildings sit in each risk band and which ones score highest. Use it to prioritise buildings by risk band when you plan the year's surveys. Administrators manage users, roles, categories and per-user access, so access can follow the way responsibility is split in your organisation.

Roofs are not the only exposure. Each report also shows flood and landslide exposure per building, together with heavy precipitation and wind gust statistics, each banded 1 to 5 from NVE and MET Norway data. Buildings in a mapped flood zone or a landslide susceptibility area are worth flagging in the survey brief.

HOMAI does not replace a full building condition survey, and it does not monitor roofs continuously. The portfolio view reflects the most recent analysis of each building and no alerts are sent; re-run an analysis when you need an updated picture, for example before the annual plan.

Before roof work is ordered, someone qualified should see the roof. HOMAI is remote screening and does not replace a physical inspection or a condition report. In particular:

• Imagery shows the roof from above and from the street. It cannot see under the roofing or into the loft.
• When imagery is poor, image quality is recorded and uncertain counts are shown as ~N. Without imagery, the report carries a "Roof not yet assessed" banner and covers climate and registry data only.
• Images are only as recent as the provider's latest flight or capture, so recent changes may not be visible.
• Coverage is Norway only.

The AI in HOMAI describes what it sees and writes the summary. It never sets the score, and it is not allowed to estimate age or area. Read more about what the AI does and does not do.

The same findings matter when a policy is renewed or a claim comes in: see roof and climate data for insurers, or the overview of the four industries HOMAI serves.