As how-to book and blog authors we face many questions that begin, “Is it safe to . . . ?” And, for some reason, any post of ours involving rocket stoves sets off a firestorm of incoming Google hits.
An old blog post on a “Redneck Rocket Stove” made out of cinder blocks prompted many to suggest that the cinder blocks would explode due to heat. Leon, of the blog Survival Common Sense, does a good job of refuting this notion in a blog post, “Build a brick rocket stove: Is it safe to use concrete blocks?” The short answer is that those concrete blocks are not going to explode. But if you want something permanent you should use fire bricks and fire clay as mortar so it won’t crack.
Opinions? Have you faced this issue?