Board insulation / Discussions

...board, called GPS.  Do you have a webpage about GPS insulation?  I want to insulate my existing basement concrete floor, on top of it.  I have very limited head room, no more than 5 ft where there is no pipes on the ceiling.   GPS insulation is Graphite polystyrene insulation, and it does offer a bit higher R value. We...

...insulation boards I have a few questions that will help us pin down the best way forward for you - How old is the home? Is there an exterior membrane on the basement wall? And have you ever had any flooding issues, either from bulk water, or just high water tables?