08:55AM | 10/09/01
Member Since: 04/08/99
3 lifetime posts
I've converting an empty room into a bathroom. I've ripped out the drywall so I can replace it with concreteboard (shower) and greenboard (rest of walls). There was insulation behind the old drywall, but since I had to fir out some walls I want to add insulation on top. The current insulation is paper faced...can I add additional paper faced insulation on top of the old, or do I need to buy unbacked insulation and put it under the paper faced insulation that is there now.

Thanks in advance

Jay J

09:05AM | 10/09/01
Member Since: 10/26/00
782 lifetime posts
Hi spireview,

Good question. The paper acts as a vapor barrier. With that, it will 'trap' any moisture that gets to it in the insulation. The BEST thing to do is to reinsulate. It's cheap enough. The vapor barrier should go on just underneath of the backerboard and greenboard.

With that, you don't want to simply add insulation on top of the kraft. However, you DO want to 'fill' the void so I'd simply re-insulate.

My best to ya and hope this helps.

Jay J -Moderator

PS: God Bless America!

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