Crawl Space Heating Issue

[Steve DellaPelle]

Hi all,

Last winter I had tenants that complained about their bathroom being too cold...it apparently got so bad that the toilet would freeze up and the only short term fix was using a space heater which they did not want to keep paying for on their electric bill...the bathroom has a large crawl space (20' x 10') directly underneath it...

The following summer I decided to have the crawl space insulated with spray foam to help trap the heat that is coming from the Gas Boilers which I figured would be enough to keep the bathroom warm (also paired with their forced hot water heating that runs through the bathroom)...

Fast forward to today and they are still having issues and complain about it...has anyone faced a similar issue with a crawl space that causes something like this? What are my options to resolve this matter?

Thanks,

Steve