Talk:Grenade/@comment-70.74.226.235-20120414054052/@comment-84.167.161.43-20130604144929

You need one explosive (grenade, bomb, dynamite, etc) to summon the demolitionist. Also, make a decent house about 7x7 blocks for demolitionists (same for any other NPC) and make sure it is filled with background walls, one chair, one table, one door, and a light source (You can add as many chairs, tables, doors, and light sources as you want though). Have the explosive in your inventory and the house set, and in a few minutes the guy will spawn out of nowhere and he'll be somewhere near the empty house. So yes.