My house has an extension which is a double garage with a bedroom above. The bedroom is very cold. I cant access the roof area from the main loft so not sure if there is insulation. We moved in summer and had new carpets fitted so I now cant lift flooring to put insulation in floor. Any ideas? I could only think of having an access hatch put in the bedroom ceiling to see if it is insulated but thats not ideal. I could have the garage ceiling removed but that wont be easy or cheap. Any alternatives?