I have a "summer house" in the garden, it's been there years, but the floor has started to fail/rot - I managed to put my foot through it!
I plan to remove the carpet tiles, treat the existing floor boards with anti-rot stuff, and then put additional flooring over the top to give new stability.
Is this a good idea? What new flooring would be the best value option? I've been looking at P5 T&G chipboard, regular chipboard, plywood, etc.