Door Threshold / September 15, 2018 / Leala Melanson
These protectors can be made from molded plastic or cardboard. Pre-molded plastic protection works well for jambs with standard door casing widths. For larger jambs there are several wrap-around jamb protectors that work similarly but are not molded to an exact casing size. These reusable protectors provide excellent protection however they are the most expensive jamb protectors in the market. Less expensive cardboard protectors wrap around jambs in a similar fashion and cost considerably less than their plastic counterparts. These are available from a wide range of manufacturers can be purchased online or in construction supply stores as well.
But what about retrofitting a new entry door system in an older home built with cinderblock masonry walls? You cant use the same technique of just nailing through the jambs the masonry will just deflect and bend a regular framing nail. Cut nails might possibly work but the chances for jambs alignment adjustments are slim to zero while the chances of masonry cracks or half-moon hammer head marks in the jambs are almost a given. Masonry screws need to be started in pre-drilled cinderblock holes which can be drilled through the jamb but Ive never been satisfied with their holding power alone where the cinderblock is prone to crumble around the holes while adjusting screws and snugging shims tight. Experience has taught me to always insert plastic expansion sleeves in the cinderblock to properly fasten masonry screws.
UV protective tape has chemicals in both the tape and adhesive that block UV rays and make the tape resistant to both sunlight and heat. It can be used in both hot and cold climates without the worry of adhesive transfer resulting in a quick and clean removal upon project completion. Although more expensive than other tapes UV protective tape is very cost effective when the costs of clean up or repainting of entry thresholds are considered. Blue masking tape and blue sill tapes are the most common tapes for protecting thresholds. These low cost tapes work for short term protection only in areas of low heat or sunlight.