how do I install a door check on a securty door ????

Question

how do I install a door check on a securty door ????

Answer 1

Do you mean a veiwing sight? If so, most security doors are just made of sheet metal with a hollow core. Just mark the location of the hole (check veiwer package for proper size), use a center or prick punch to dimple the spot, start the hole with a small (1/8") drill, then select a metal cutting twist drill bit in the proper size, make very sure the bit is stright level while finishing the hole. From there it's just a matter of assembeling the veiwer following the instuctions that came with it.



The reason to use the 1/8" bit to start is two fold. First it is the best insurance to prevent the larger drill from moving offcenter and marring your door and also if you find that there are any supports or fireproof matrial unnder the sheet metal, it's much cheaper to break a small $1 drill bit than a larger one. Any fireproofing material can be drilled with a carbide tipped masonary bit.