Insulating the Bathroom.

About three quarters of the rear wall of the bathroom is poured concrete below ground and insulated on the outside. I added polyiso to the inside of the concrete wall and replaced the Fiberglas with rock wool. The interior walls of the bathroom were insulated with Fiberglas too and I think that was a good idea so I left it in. But in some places it had to be replaced because it was moldy or was removed to work in the walls.
The next day the drywall people were coming at noon so I only had a short time to finish insulating. First I worked in the attic. Without the ceiling I had much better access to the corner of the attic so I stuffed it with Fiberglas bats. Then I replaced part of the knee wall Fiberglas with rock wool in the area I could reach. I insulated around the new fan with left over pieces of rock wool too. I did not insulate the area where the sun tunnel will be located.
The plastic vapor barrier had been cut for access to the attic. I wanted to use the siga waterproof breathable membrane on the ceiling to replace the plastic. I stapled it around the ceiling over the plastic that was still there and taped the edges and joint with siga tape.

Space for sun tunnel
Space for sun tunnel

I was almost finished when Ben showed up with the denshield for the tub ceiling. He put it up while I was finishing the tape.

Denshield over tub
Denshield over tub

Denshield is a type of paperless drywall required by LEED for a tub/shower surround. The Kerdi board by Schluter also meets the LEED requirement.

Paperless board over tub
Paperless board over tub

I also had to insulate the hot water pipes according to LEED. I was almost out of time before the dry wall guy came. The hot water return is located here by the tub. Notice how the sink water pipes were moved from the floor to the wall behind the vanity.

Insulated hot water pipes
Insulated hot water pipes
Sink hot water pipe
Sink hot water pipe

About noon the drywall man arrived to put up water resistant blue board in the rest of the room and mud and tape it.

Blue board walls
Blue board walls

He finished in a few hours and work was over for the week.

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