On this day in 1938, John Thomas and James Slayter got a patent for a process to make glass wool. This was no threat to sheep, but rather a new way to make insulating material with fibers that were extremely durable and totally moisture-resistant. Today, we call this product fiberglass, and homeowners add roll after roll in walls, attics and under floors to increase comfort, boost r-values and save on energy bills. With Old Man Winter just around the corner, now is a good time to think about adding insulation. Starting to notice cold feet? Maybe you have a crawlspace under the floor that could use just a little more insulation. Run some strips of baling wire at right angles to the floor joists with room to slide batts of insulation into place. The facing goes upward, and any remaining space creates an air pocket that insulates, as well. Glass wool increases comfort and saves money, too. And that's the On The House tip for today.