Q-Bot has created a robotic device that applies underfloor insulation to suspended timber floors. A remotely operated device applies spray foam insulation to the underside of the floor.
The robot is inserted into the space under the floorboards via a small access hatch. It surveys the space under the floorboards, then sprays the foam to the underside of the floorboards, which expands to fill the gaps, while maintaining the ventilation space below. According to its owners and creators, the technique can reduce heat loss through the floor by up to 90%, leading to significant savings on heating and reduced carbon emissions as a result.
It won’t be suitable for every home, but this could provide an interesting, less disruptive mechanism for insulating beneath your floorboards.