Insulating the concrete ceiling of the upper floor / What to watch out for?

  • Erstellt am 2020-10-20 21:57:06

K1300S

2020-10-23 07:02:53
  • #1
I did not mean that you should not insulate at all.
 

benediktr

2020-10-25 18:33:24
  • #2
We insulated 115 sqm yesterday with Puren WLG022 in 160 mm on the top floor ceiling. It is quite easy to install due to the stepped tongue and groove. For me, it was clear from the beginning to build a ventilated cold roof. If you insulate the rafters on an upper floor ceiling and do not intend to convert the attic into living space at some point (which is not possible for us anyway), you are blowing unnecessary energy into the unused attic space. This is sufficient for Christmas baubles or similar.

 

Piotr1981

2020-10-25 20:22:34
  • #3

May I ask how long you needed?
Where did you start and how do you proceed at the entrance hatch? With a vapor barrier foil underneath?
 

benediktr

2020-10-25 20:59:14
  • #4


Of course you may ask. We started at the eaves because we have a very flat shed roof. The roof was done parallel to that and the insulation was laid when only the rafters were in place. There were three of us (one cuts, one lays, and one cleans up) and it took 12 hours. Below is a vapor barrier with sd=100 but only to protect the insulation from residual moisture. Generally, as far as I know, no vapor retarder/barrier is needed with concrete ceilings. We first cut the foil around the hatch area with sufficient overlap.
 

nordanney

2020-10-25 22:04:33
  • #5

Yep!
 

WingVII

2020-10-25 22:51:15
  • #6
If you want to cover the insulation, for example, extensively with OSB boards, then I believe you do.
 

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