Steve Barker LT wrote:

I've mentioned in other posts about our 135 yr old house we're working on.
At this point I'm rebuilding the floor on the lower level. This house
basically sits on the ground. My new joists will be about 4" off the dirt.
I've been through the "to vent or not to vent" threads about crawl spaces.
I've decided not to ventilate. It's been closed for 135 years, it can keep
being closed. My question is, IS there any reason why I shouldn't fill this
space will insulation? Whether it be fiberglass or blown cellulose? In a
few days I'll have all new joists and proper center support and will
probably insulate unless there's some reason I shouldn't.

thanks!

Hi,
When I converted my backyard deck(lean to house) into a 4 season sun
room, I replaced decking with a ready made floor panel sections
sandwiched with R-30 foam core. This was installed on top of joists.
Then directly Armstrong vinyl flooring roll was put down.
I believe this foam core comes in various thickness for your needs.