How to Install a Door Jamb. Doors are more complex and deserve more care than you might think. A good door has to be leveled according to the flooring and ground slope. This is where your jamb comes into play. To install the jamb the right. Search 38 Tehran, Ostan-e Tehran, Iran door manufacturers and suppliers to find the best door manufacturer or supplier for your project. See the top reviewed local door manufacturers and suppliers in Tehran, Ostan-e Tehran, Iran on Houzz.
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Pre-hung door units are the easiest to install. This type of door is always installed on new homes. The unit comes complete with jambs and hardware. It's milled and machined to fit perfectly and it does. There's no routing, cutting or mortising. The unit installs in less than 30 minutes. Almost anyone can do it. If you're planning on installing new doors, this type of door is the most efficient.
1
Measure the rough opening where the door is to be installed. Order the prehung door. You only need the rough measurement between studs and the height, which should be standard.
2
Pick up the door with both hands on either side. The door will be nailed inside the jambs through the doorknob hole. Don't remove the nail. Stand the unit inside the door opening. Make it flush on both sides of the wall and on both sides of the opening.
3
Tap cedar wedges between the jambs and the opening to steady the unit inside the jambs. The wedges should be installed between the jambs on the interior side and the exterior side. It's OK if they overlap each other slightly in the middle. Use a hammer to tap equal amounts of wedges on both sides of the jambs to position the door equally inside the jambs. It should be snug, but not tight, inside the opening.
4
Place a level vertically on both sides of the jambs. Tap or remove wedges on either side of the jambs to align the door with the level. Add additional wedges to tighten the door inside the jambs when it is level. It may be necessary to double up the wedges to get the door tight. When the door is tight, tap some additional wedges between the jamb and the horizontal opening on top on both sides of the door.
5
Pull the nail out of the doorknob hole using diagonal pliers. Open and shut the door a few times. If it rubs or sticks, adjust the wedges as needed until the door opens and shuts smoothly. Tap the wedges in so that they do not extend past the edges of the jambs. If they are too tight and you can't hammer them in all the way, use a coping saw to trim the ends of the wedges flush with the jambs.
6
Shoot 2-inch finish nails through the center of the jambs around the perimeter. Space them 8 inches apart. Fill the nail holes with wood putty using a putty knife.
7
Measure the vertical sides of the jambs from the floor to the top inside corner of the jambs and add 1/4 inch. Set a miter saw at 45 degrees. Miter four pieces of 5/8-by-2 1/4-by-84-inch door casing with two left, and two right-hand miters. The measurements should be from the short point of the miters to the end of the jamb where it sits on the floor.
8
Nail the mitered pieces flat on the sides of the jambs on the interior and exterior sides of the door, 1/4-inch from the edge of the jambs. Use a finish nailer with 1 1/4-inch finish nails. Space the nails 8 inches apart. The 1/4-inch spacing is the lip, or reveal between the jamb and the casing that is customary on all door installations. The left-hand miters go on the left side. The right-hand miters on the right side.
9
Measure the distance between the short points of the miters across the top horizontal jamb. Miter two pieces of casing with one left, and one right-hand miter to fit on the interior and exterior side of the door.
10
Nail the horizontal pieces on top on both sides of the door, matching the mitered corners together. The 1/4-inch lip or reveal between the jamb and casing should remain the same on the top as it is on the sides. Use the same nail spacings as the vertical pieces. Fill all the nail holes with wood putty.
Things You Will Need
Pre-hung door
Hammer
Cedar wedges
Level
Diagonal pliers
Coping saw
Finish nailer
Finish nails, 2-inch
Wood putty
Putty knife
5 pieces door casing, 5/8-by-2 1/4-by-84 inch
Miter saw
Finish nails, 1 1/4-inch
Tips
Lots of prehung door units and door casings come already finished. For the quickest, easiest installations use this type. Fill the nail holes with a color-matched putty stick.
If you plan on painting, install the door unfinished and paint everything at once when you paint the walls. Cedar wedges are stocked by home improvement stores specifically for installing doors and windows. Purchase these when you pick up the unit.
About the Author
Specializing in hardwood furniture, trim carpentry, cabinets, home improvement and architectural millwork, Wade Shaddy has worked in homebuilding since 1972. Shaddy has also worked as a newspaper reporter and writer, and as a contributing writer for Bicycling Magazine. Shaddy began publishing in various magazines in 1992, and published a novel, “Dark Canyon,” in 2008.
Photo Credits
Barry Austin Photography/Lifesize/Getty Images
Cite this Article
Choose Citation Style
Shaddy, Wade. 'How to Install New Interior Doors the Easiest Way.' Home Guides | SF Gate, http://homeguides.sfgate.com/install-new-interior-doors-easiest-way-67697.html. Accessed 13 January 2020.
Shaddy, Wade. (n.d.). How to Install New Interior Doors the Easiest Way. Home Guides | SF Gate. Retrieved from http://homeguides.sfgate.com/install-new-interior-doors-easiest-way-67697.html
Shaddy, Wade. 'How to Install New Interior Doors the Easiest Way' accessed January 13, 2020. http://homeguides.sfgate.com/install-new-interior-doors-easiest-way-67697.html
Note: Depending on which text editor you're pasting into, you might have to add the italics to the site name.
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Installing single doors or 'slab' doors into openings with existing jambs means the door has not been mortised for hinges. To install a door into an existing opening, the door hinge pattern is taken from the jambs and transferred to the door so that it fits the opening. This is always done when replacing existing doors and is an ideal way to add value or update your home for resale. You can install a door into an existing opening using only a chisel and a cordless screw gun.
1
Place hinges into the jamb hinge mortises -- these are the cutouts where the hinge plates fit into the jambs. Using a cordless screw gun and three-quarter-inch screws, place one screw in each pre-drilled hole in the hinge plates and screw the hinges to the jamb.
2
Stand the door vertically into the opening as if it already were installed. Use a hammer to tap two wedges under the door until the top of it is within an eighth of an inch of touching the ceiling.
3
Tap two more wedges on the opposite side of the door from the hinges to hold the door tight into the opening. Check to see that there's an even amount space all around the door and the jamb. If there isn't, adjust the wedges and tap them in again until both sides have even perimeters. The hinge side perimeter will be wider by an eighth of an inch.
4
Trace the hinge locations onto the door with a pencil. There will be enough of the hinge sticking out of the jamb to run a pencil around it, tracing the hinge location to the door. Do all the hinges.
5
Pull the door from the opening and place it flat across two sawhorses. Unscrew the hinges from the jambs. Hold one of them on the side of the door where it is to be installed. Align it with the marks you made and trace around it to complete the hinge tracings on the side of the door.
6
Cut around the tracings with a utility knife to a depth of an eighth of an inch. Hold a chisel at a 90-degree angle to the side of the door at the opening to the tracing. Tap on the end of it with a small hammer to drive it into the tracings, cutting the bottom of the tracing out flat to a depth of an eighth of an inch.
7
Place the hinge plate into the cutout. Check the fit. If the hinge doesn't fit perfectly into the opening, continue cutting the high spots, corners and sides of the tracing until the hinge plate fits flush and snug into the tracing. Use your hands to rock the chisel back and forth as you shave the bottom of the tracing out even and flat.
8
Screw the hinges to the door using one three-quarter-inch screw for each hole. Hold the door up at a 90-degree angle to the opening. Swing the hinge plates over and move the door up or down, left and right until the hinge plates on the door match the hinge cutouts on the jambs. Tap the hinge plates on the door into the hinge cutouts on the jambs.
9
Screw the hinge plates to the jambs using the cordless gun and three-quarter-inch screws. Shut the door normally.
Things You Will Need
Hinges
Cordless gun
3/4-inch screws
Wood wedges
Utility knife
Chisel
2 sawhorses
Tip
Always finish and install the doorknob before hanging the new door. If the striker plate on the jamb doesn't match up right with the new doorknob, use the chisel to cut the mortise out slightly larger and move it to match the new doorknob. It won't take much and you'll never notice it if you place a small amount of stain on the places where you cut.
Warning
Wear safety glasses when working with wood or woodworking tools.
About the Author
Specializing in hardwood furniture, trim carpentry, cabinets, home improvement and architectural millwork, Wade Shaddy has worked in homebuilding since 1972. Shaddy has also worked as a newspaper reporter and writer, and as a contributing writer for Bicycling Magazine. Shaddy began publishing in various magazines in 1992, and published a novel, “Dark Canyon,” in 2008.
Photo Credits
Jupiterimages/Photos.com/Getty Images
Cite this Article
Choose Citation Style
Shaddy, Wade. 'How to Install an Interior Door That Is Not Prehung.' Home Guides | SF Gate, http://homeguides.sfgate.com/install-interior-door-not-prehung-23277.html. Accessed 13 January 2020.
Shaddy, Wade. (n.d.). How to Install an Interior Door That Is Not Prehung. Home Guides | SF Gate. Retrieved from http://homeguides.sfgate.com/install-interior-door-not-prehung-23277.html
Shaddy, Wade. 'How to Install an Interior Door That Is Not Prehung' accessed January 13, 2020. http://homeguides.sfgate.com/install-interior-door-not-prehung-23277.html
Note: Depending on which text editor you're pasting into, you might have to add the italics to the site name.