In a previous post of mine, many here may know that I recently installed a Lennox Canyon C310 insert into my masonary fireplace. The unit sticks out all the way to the end of my existing, elevated hearth. Therefore, in order to meet the install and code requirements, I need a hearth extension to complete the job. I asked for some recommended vendors of pre-fabricated hearth extensions that would meet the required R-value for my application. It seems that the major player in this realm is Woodland Direct. Some other notable producers of hearth pads / extensions are Diamond Hearth and Hearth Classics. I contacted all of the above vendors, and was shocked to learn that the going rate for a Type II, 18” x 48” extension was around $500 through a preferred distributor! At this point, I would just consider making my own, but for insurance purposes, I like the idea of being able to pull out a spec sheet / receipt to prove that the hearth pad meets the required R-value necessary for my insert. I was beginning to get discouraged in my search, when a local hearth shop pointed me towards American Panel Hearth Products as their preferred line. I asked for a quote on a Type II, 18” x 48” extension w/ copper slate finish, and was shocked to hear the total come out to only $285 delivered! Low and behold, it turns out that this is the same manufacturer that Woodland Direct represents, and the exact same model that I ordered priced out at $500 on W.D.! So long story short, buying a hearth extension from Woodland Direct is an expensive proposition. I highly recommend doing the distributor search on American Hearth Panel’s website, and contacting your local dealer to negotiate a better price. For anyone looking for a hearth extension, I hope this thread proves to be worthwhile in directing you to a lower-cost solution.