Insulating basement with existing VB, Worthy...
I have followed you postings and you have some great professional solutions.
For more reasons that I can shake a stick at, I needed to install a partial only interior drain system. The system is only on the front part of the basement and 6' on each side. All this feeds into a sump pump. When they built my house, they poured the slab at the same height as the footings because the floor height would be too high. Yup, there is only like 1" of slab concrete sitting over the footings at the walls. So the only solution was to put down a 20Mil. vapor barrier on the wall and drape it into the trough system they put in place. The also drilled (2) 1/2" holes into each first course of block. So any water that rises below the floor and and water coming into the block weeps behind the VB and goes into the gutter trough, which then flows to a 3 pump sump pump system.I had the system installed in late 08 and has been working great for its purpose. I can access the gutter system via 2 access ports and the gutters have been dry as the sump pit takes care of the ground water.
I now want to finish my basement. I already started a small section of the basement by putting down platon (1/4" dimpled membrane), taped the seams and tapcon'd 3/4" TG OSB. This has been installed for 6 months and doing good.
My question to you is what is the best approach to insulating the walls that have the VB on the wall. I planned on 1-1/2" XPS on the walls, followed by FB in the stud cavities. I live in a area of New England / North Mass. that only sees 20f-40f degrees for about 3-4 months of the year. I have asked the guys on the Holmes on Homes forums and all they do is bash me for my interior weeping tile system. They were usually helpful. My option that I needed to take was an interior system and I need and want to move forward.
I also plan on tiger foaming the joist cavities and foaming down the sill plate till the foam meets to top of the ridged XPS. I need advice on the insulation portion so I can move forward before I start studding the walls.
Here are some pics of what I have installed.
In this pic I replaced the 1" foam floor with 1/4" Platon membrane, taped, with 3/4" TG on top. The rest is that I think I should do??