Roy Clarke wrote:I just stacked bricks around three sides of mine, touching the casing. it took around 40 bricks for a single layer. I could put another layer round it. It keeps the room warm for longer once it's all warmed up, and the comfort is better. I didn't put anything on top as the kettle has to sit somewhere.
R wannabe wrote:Rocks, urbanite, cob--anything that can be stacked and not burn. A good metal drum filled with water placed in the corner would hold a TON of heat for cheap.
Whatever you do, make sure the floor can hold the weight.