Door Threshold / September 15, 2018 / Leala Melanson
Ive learned by the hard way of experience that its necessary to remove old existing jambs carefully. If directly fastened to masonry with cut nails jambs removal may break out the cinderblock unless the jambs are cut into short manageable lengths. An out of level concrete threshold step can be ground flat by a concrete cutting subcontractor or the door threshold can be adjusted by unscrewing and repositioning in the jamb by the amount out of level. Any attached brickmold and casing must be removed from the jambs to make installation easier with shimming. Also brickmold will probably have to be ripped in width to fit the overall brick opening width and height.
Doors can be protected with temporary cardboard door protectors available from a variety of manufacturers. Several protectors are not only made from recycled cardboard but can be reused and recycled entirely again making these protectors truly green. The first protector to market and most popular is DoorGuard. It is a truly green product that uses recycled cardboard for the door protection with natural rubber bands for attachment. Another popular protector is the 1-2-3 Doorshield product. This protector is not recyclable as it uses plastic Velcro for the door attachment.
Tightly wedged shims will allow you to operate the door carefully. Open and close to check the door touching the weather stripping evenly top to bottom for any possible jambs twist. Adjust as necessary even though jambs may not flush with plaster top to bottom. A good carpenter wont assume the original door was installed correctly right? Check the brickmold reveal you should have consistent and even measurements side to side and top to bottom. Its unusual to have brick out of plumb to any great extent. Adjust shims again as necessary. Index the jambs in the rough opening and the shims to jambs with pencil for reference when installing the system permanently. Remember you only have one chance to get this installation right so be patient - you will be rewarded with a satisfying outcome.