Modern roofs can last three decades or more, depending on the materials used and the expertise and commitment to excellence of the contractor. Older roofs, however, aren’t quite as eternal. If you ha ... read more
If you don't want to loose ceiling height, you will need to remove the celing covering to gain access to the floor joist cavities.
A product we've had great sucess with is Roxul (http://www.roxul.com ... read more