I am construction a garden office and want to ensure it is waterproof. I have completed the concrete slab and want to ensure that when I do the floor construction it is waterproof and no damp rises from the ground.
What is the best way of doing this ? I was thinking plastic sheet over the concrete then put my joists across, then laying Kingspan (or equiv) insulation between joists before putting the floor down ? Construction is a wooden frame, can the bottom of the frame sit straight on the plastic membrane that is on the concrete or does it need extra protection.
Any comments greatly appreciated.
john.
What is the best way of doing this ? I was thinking plastic sheet over the concrete then put my joists across, then laying Kingspan (or equiv) insulation between joists before putting the floor down ? Construction is a wooden frame, can the bottom of the frame sit straight on the plastic membrane that is on the concrete or does it need extra protection.
Any comments greatly appreciated.
john.