Extension jambs are added to door or window frames to make them fit securely against a wall. They are made of wood or other materials and require careful measurement and installation. Door jambs must be attached to the opposite side of the hinges, while window jambs require attention to the specific design of the window. Basic tools are needed for installation, but professionals are available for those who prefer not to DIY.
An extension jamb is a piece of wood or other material that is attached to the inside of a door or window frame to make it larger and make sure it fits against a wall. Extension jambs are often used in building construction when a window jamb or door jamb does not install securely because it is not wide enough to accommodate the dimensions of the wall. Attaching a section of wood, board, or other substance lengthens the jamb and allows it to fit snugly into place.
When building an extension jamb, there are several key factors to keep in mind. If using a block of wood, a section free of knots and other imperfections should be chosen so that the integrity of the wood remains strong and solid. The space around the window or door should also be measured very carefully. Typically, the wood is cut to a thickness of 3/4 inch (about 1.9 mm) and then tested against the jamb. If it is of the appropriate thickness, the window or door extension can be nailed, stapled or drilled into place, making sure the fasteners go into the wood at least 1 inch (about 25.4mm).
The extensions applied to the door jambs must always go to the opposite side of the door from where the hinges are. If an extension jamb is attached to the same side as the hinges, it can be nearly impossible to fully open the door. This reminder can save you a lot of headache after the installation process is completed.
Window jamb extensions can sometimes be more complicated than door jambs. While doors come in fairly standard shapes and sizes, windows don’t follow that protocol. When fitting an extension for a window it is important to pay close attention to the exact design and idiosyncrasies of the window itself so that the panel can be cut to fit correctly.
A variety of hardware is used in the creation and installation of an extension jamb. Saws, power drills and drill bits, staple guns, staples, hammers and nails are the basic tools needed to accomplish this project. Installing the extension jamb requires no special tools or advanced building construction knowledge, and the entire undertaking should take approximately three hours.
For those who aren’t comfortable tackling this project on their own, there are window and door specialists who are pros in proper installation. They are readily available and can be contracted for jobs large and small. Reputable contractors can be found online, in the telephone directory, or through word of mouth.
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