About to start my basement - vapor barrier and insulation Q's.
More than just that really - a quick sanity check on what I'm doing is appreciated, as I start I want to be sure I've covered enough with my contractors and haven't missed anything.
Background - my currently unfinished basement in a circa 1920's NYC two family brick home. Have agreed with the contractors to start next week, with the following task list:
- Move some plumbing around to accommodate new floor plan
- Level existing concrete floor
- Install porcelain tiles
- Wire electrical outlets and ceiling fixtures
- Insulate and frame foundation walls
- Vent and enclose boiler room (this area was hideously out of code until now)
- Add kitchen and bathroom
I'm stuck on two items in particular - whether I'd like to add a recirculating pump and baseboard heating, and what type of insulation should be used on the surrounding walls.
I still have several bats of foiled fiberglass insulation left over from our renovation on the first floor a few years ago. I haven't had any moisture issues upstairs, but a basement is a new animal. From a few searches, I've seen that some people don't recommend the use of fiberglass bats in the basement, because they don't abate the moisture. In others, I've seen it recommended, but only with the use of a vapor barrier.
I've decided that I want to seal the foundation walls prior to beginning, so I'm off to Home Depot for some Drylock. I had applied Thoroseal to half the basement walls sometime back, and haven't had any issues with it, so I'm not sure how much of a concern moisture will be anyhow.
Is there a reason to skip the fiberglass bats and go with extruded polystyrene (foam board insulation) instead? I see that Dow makes a product called Wallmate, not sure whether that makes sense instead (and I'm sure the cost will be considerably different). If I go with the bats, would they need a vapor barrier, or is the foil side sufficient?
Finally - anything else I should consider asking these guys to do as they go on? I've already asked them to add a drain to the boiler room (from what I can tell, there was one prior, but it hasn't worked since we bought the house). I haven't spent much time in finished basements, and throughout our home ownership there hasn't been any issues down there, so I'm in the dark, any advice is greatly appreciated.