micro-balloons For insulation

ryhed wrote:
Has anyone on this board try anything like this yet http://www.isbu-info.org/eco_insulations.htm

When I first started working at an aircraft company in the early 70's micro balloons were quite common. They were cheap and made the product lighter. Strength to weight is important in aircraft structures. Any potting compounds can be mixed with both micro balloons and macro balloons. I used them for potting honey comp core for fasteners. Getting the mix right is important. I think you have a good idea for your roof. It would allow for a thicker coat without sagging or running. Use a mask when mixing and mix by hand. I would start with a 50-50 mix by volume. Beside reflecting the sun for a cooler inside temp, it would lower the cost of the acrylic or latex covering, and may also reduce out side noise. let us know how this turns out for you.