Ask a Tradesman
Carpentry & Joinery Question
Kingspan at bottom between floor joists wondering about ventilation problems
have installed kingspan at the bottom between floor joists in 400 widths strips held up with plywood strips attached to bottom of joists. I was wondering about condensation problems, I worked out my temp drop is 1.5 degrees c and condensation starts at 3.5 but reading kingspan will stop ventilation and wondering should I install 70mm vents in kingspan to help with ventilation between the floor joists.
Hi, just to answer your question on condensation, if the existing floor is a suspended timber floor there should be external air bricks providing air below the floor joists, so there should be no condensation problems,if there is a free low of air.
Answered 26th Jan 2017
hi there should be air bricks or vents in your brickwork on floor level giving the right amount of air floor and i usually fit kingspan 30mm back from floor so its not tight hope this helps scott
Answered 15th Mar 2017