Any thoughts how to shunt air flow from existing house (x5 double airbricks) through to extension void (under block and beam) out through 2 airbricks in the engineering bricks of the extension. Would you make new holes in the existing hole recessed lower or have pipes that shunt below?
Ps The old air vents will be sealed off by the block and beam and insulation to level the ground
Ps The old air vents will be sealed off by the block and beam and insulation to level the ground
