Fiberglass is harder and stronger than wood but can just as easily be drilled into using wood drill bits. The fiberglass will dull drill bits out fast and generally require pilot holes when drilling holes any bigger than 1/8 inch.Click to see full answer. In this regard, can you drill into fiberglass?Drilling fiberglass can be a time-consuming procedure if you wish to drill a perfect hole. This is because fiberglass has a gel-coated surface, and the edges of a drill bit tend to get underneath this surface and then chip it off. The larger the drill bit, the greater the likelihood of chipping. what is the best drill bit for fiberglass? They’re tougher than basic HSS bits and stay sharp longer. They work for drilling wood, metal, fiberglass and PVC. Carbide-tipped drill bits stay sharp much longer than steel, HSS or titanium bits. They’re effective for drilling tile and masonry. In respect to this, can I put a peephole in a fiberglass door? A. Fiberglass doors are built with two fiberglass panels with wood blocking and insulation at the core. You can drill through these materials to install a peephole. Most peepholes require 1/2 in.Can you drill into a vinyl door?Patio doors come in a variety of construction materials, such as vinyl or glass or wire mesh, but they all share a metal aluminum frame. To drill a hole through a patio door, for example, to run an antenna wire through from the outdoors into the home, use a power drill with a metal drill bit.