A vapor barrier with holes in five of its area is still 95 effective. If possible, patch the polyethylene with housewrap tape. U.S. building codes don’t require an interior vapor barrier, but it is only as effective as its weakest point. If a vapor barrier is damaged during drywall installation or repair, it may be patched with sheathing tape.
In hot climates, any moisture that condenses on the exterior side of the vapor barrier will be drained to the exterior since the vapor barrier is also a drainage plane. This wall assembly will dry from the vapor barrier.
To install a vapor barrier around an electrical box, inspect the wall for signs of damage or moisture and ensure no gaps exist in the existing vapor barrier membrane. In cold climates, the barrier goes on the warm (interior) side of the wall. Sheathing tape, also called construction tape or Tuck tape, can be used to patch all holes in a vapor barrier.
It is important to use appropriate tape to re-seal cut locations and overlap if desired. Tyvek tape is a good and sticky option for this application. Pull the electrical box vapour barrier out so the four sides are over top of the poly barrier. Use 3m tape or Tuck tape to seal the four sides.
Ensure that the sealant material used complies with any required fire resistance rating and is compatible with the pipe, conduit, or wire. It is better to insulate as close to the tub as possible and create an insulated space around the panel.
📹 How Vapor Barriers Work
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📹 Vapor Barrier Installation Around Electrical Box-DIY
In this video, I show you the process for installing a vapor barrier around an electrical box. It is important to use a vapor barrier …
There are what they call Poly hats which are made for fitting around electrical boxes. I’ve done both but prefer polyhat as its just cleaner and easier to deal with. For those people getting upset about putting screws through vapour barrier, guess what happens when you finally install the drywall? Oh wait, someone might say “We glue the drywall down.” Some people may apply tuck tape to all the staples that hung the vapour barrier. I can see tuct taping a hole but staples? Manufacturers I noted are making insulation more water resistant… and sound proofing it as well. Some day in the future years from now, it may happen that vapour barriers may not be needed as the insulation is 100% resistant to moisture.
OK … you’re trying …. but seriously I have 0 idea of how things should be done, but even for me 1. Why with this method worry about wrapping the barrier around the box and poking the screw through into the mounting holes. Just hold the vapor barrier against the stud and mount the box 2. How are you going to seal this to the vapor barrier after insulating is done?