In fact, most people with diverticulosis do not have symptoms. However, diverticulosis can sometimes cause unexplained painful cramps, bowel movement disturbances, and blood in the stool. The narrow opening of a diverticulum can bleed, sometimes heavily, into the intestine and out through the rectum.
Our first step in waterproofing your crawl space is to create a perimeter drainage channel along the interior edge of your foundation walls. Any water entering from your floor (or through the walls themselves) is collected in this drainage system, which is pitched downwards to a sump pump.
You say that the perimeter walls of your basement and crawlspace are insulated, and that is the correct method to prevent heat loss through the foundation walls of both spaces. This will allow you to properly air-seal and heat your crawlspace, which is the correct way to warm the floor above.