How thick should I line my forge with Inswool?
The more insulation you have in your forge the better, to a certain degree. A 1″ layer is generally enough for most forges, however, adding 2″ and even 3″ can significantly increase the efficiency of your forge. A more efficient forge uses less fuel and costs less in operating costs. The tradeoff is you have higher initial lining costs. A limiting factor is the size of your forge shell. You do not want to make your forge chamber too small such that the burner flame impinges directly on the work piece if possible, be sure to leave enough room for proper burner positioning.
