Why start with the cold corner, not the boiler?

On a wet Tuesday in a 1930s end-terrace, the homeowner wanted to talk about a replacement boiler. The surveyor asked instead to stand in the rear bedroom corner where paint had blistered for three winters. That corner was the problem: the boiler was blamed for a comfort failure caused by cold bridging and blocked ventilation. The cause was simple enough — a solid wall, a concrete lintel, and a radiator pushed tight into the alcove. The solution was not a bigger heat source but a short sequence of fabric fixes and a lower flow-temperature plan. Start where the discomfort shows, not where the fuel burns.

What does Bananzia ask you to photograph before the visit?

Before the technician arrives, Bananzia asks for four photographs: the damp corner, the radiator valves, the meter cupboard, and the loft hatch. In the terrace, those images changed the visit. The problem was that the homeowner had described “a cold house”; the photos showed a single cold wall and a radiator with no thermostatic radiator valve. The cause was uneven heat distribution, not a failing heat exchanger. The solution was to isolate the room’s heat loss before sizing any low-carbon emitter. This is why the bananzia checklist starts with evidence rather than a product quote, and why a fifteen-minute photo set can save a wasted site survey.

How does the walkthrough separate air leaks from insulation gaps?

The surveyor used a handheld anemometer and a thermal camera, then told a small story about the front door. The problem was a draught that appeared only when the wind came from the west. The cause was a gap between the skirting and floorboard, hidden by carpet gripper. The solution was a bead of flexible sealant and a draught-proofing brush, not a new front door. In the same visit, the thermal camera found a missed loft insulation edge above the bay. Fabric first is not a slogan; it is a way to stop paying to heat the street.

Where does Bananzia fit when the old boiler still works?

The boiler in the terrace was nine years old and reliable, so the homeowner wanted to wait. The problem was that waiting without a plan usually means replacing like for like when the boiler fails. The cause was a lack of room-by-room heat-loss data. The solution was a staged Bananzia plan: seal and insulate this winter, add thermostatic valves and balance the system next spring, then size a heat pump for the reduced load. The result was a lower-cost pathway and a house that felt warmer before any low-carbon heat source was installed. That sequencing is the practical value of a Bananzia assessment: it turns a vague retrofit ambition into a dated, room-specific list.