Having installed appropriate joists in the 30 sq m half of my first floor that didn't have them, I now want to put down a temporary floor on which I - and the joiner who will build my dormers - can work, to complete this part of my renovation. I want to lay loft board or similar, to avoid dirtying and damaging the pitch pine floorboards that I have stacked in the garage, that will be the finished floor. Does anyone have an opinion on the cheapest way to create such a temporary floor, that will be strong enough? The joists span 3.5m to each side of a dividing wall, and are at 400mm (ish) centres.
Regards Richard