Hello,
We are planning to build a new bathroom with underfloor heating, and the company recommends using lightweight concrete in the floor joists to make it easy to cast in the underfloor heating and stabilize the floor. The house is from the late 1800s, built of wood and timber, and the current insulation in the floor joists is sawdust.
Are we at risk by improving the insulation in the floor joists? I'm thinking about increased moisture load since concrete has better insulating properties, and thus the crawl space might become colder. Is there anything that can be done to avoid higher moisture load? Something tells me I would like to tell the company to apply a little less insulation to allow for a bit more heat leakage downward to prevent future problems, but I'm not sure if I'm thinking correctly... And is it even possible with this method?
Has anyone done a similar conversion with similar conditions and has positive or negative experiences to share?
