Replacing an exterior door jamb may seem like a daunting task, but it can be completed with a few tools and a bit of know-how. By following these steps, you can ensure that your door is installed properly and will function smoothly for years to come. Begin by removing the old jamb and prepping the opening for the new one. Then, install the new jamb in the opening and secure it to the framing. But as an introduction to this guide, it’s important to consider these tips in mind when performing this task. Namely, these are steps that should not be rushed, and all measurements should be taken very carefully as even one minor mistake could severely diminish the quality of the final product.
When replacing an exterior door jamb, it’s important to take measurements carefully. Mistakes can be costly, so be sure to measure the height, width, and thickness of the door opening several times. Once you have measured, ensure to select a jamb that is the correct size for your door. The jamb should be wide enough to accommodate the door and its trim, and it should be thick enough to provide support for the door. Insufficient measurements or failing to ensure the door is sturdy enough will cause issues down the line, so don’t neglect this step.
Before starting to replace the door jamb, gather all the necessary materials. These include: a new jamb, a level, a square, a saw, a hammer, and nails. Once you have your materials, you are ready to begin. Replacing an exterior door jamb is a task that requires some planning and attention to detail, but it can be completed successfully by following these steps. By taking the time to do the job right, you can ensure that your door will be installed correctly and will function smoothly for years to come. Not only is this a great skill to have in general, but it can also save you a pretty penny instead of paying for a professional to do it.
Identifying and Measuring the Jamb
The first step in replacing an exterior door jamb is identifying and measuring the existing jamb. The jamb is the frame that surrounds the door opening and provides support for the door. It typically consists of three pieces: two vertical side jambs and a horizontal header jamb.
To measure the jamb, you will need a measuring tape and a level. Start by measuring the width of the door opening. Then, measure the height of the door opening from the bottom of the threshold to the top of the header jamb. Finally, measure the thickness of the door jamb.
It is important to be precise when measuring the jamb. Any errors will result in a poorly fitting replacement jamb. If you are not comfortable measuring the jamb yourself, you can hire a professional to do it for you.
Once you have measured the jamb, you can begin shopping for a replacement. When selecting a replacement jamb, it is important to choose one that is the same size and thickness as the existing jamb. You should also make sure that the new jamb is made of a durable material that is weather-resistant.
| Jamb Type | Description |
|---|---|
| Side Jambs | The vertical pieces that frame the sides of the door opening. |
| Head Jamb | The horizontal piece that forms the top of the door opening. |
| Threshold | The piece that forms the bottom of the door opening. |
Removing the Old Jamb
Removing the old jamb is a crucial step in replacing an exterior door jamb. Follow these thorough instructions to ensure a successful removal:
Tools You’ll Need
| Tool |
|---|
| Pry bar |
| Hammer |
| Utility knife |
Steps
-
Disconnect the door: Remove the door from the jamb by unscrewing the hinges.
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Cut the casing nails: Using a utility knife, carefully score around the edge of the casing where it meets the jamb. Then, use a pry bar to gently pry the casing away from the jamb, being careful not to damage the wall.
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Remove the jamb: Use a hammer and pry bar to carefully pry the jamb loose from the door frame. Start at the top and work your way down both sides. Be gentle to avoid damaging the door frame.
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Remove the old jamb nails: Once the jamb is loose, use a hammer and nail puller to remove the nails holding it in place.
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Clean the door frame: Once the old jamb is removed, clean the door frame of any remaining nails or debris.
Preparing the Opening for the New Jamb
After purchasing a new door jamb, the next step is to prepare the opening to ensure a proper fit and installation. This involves removing the old jamb and preparing the opening to receive the new one.
Here are the detailed steps for preparing the opening:
- Remove the Old Jamb: Using a pry bar or a reciprocating saw, carefully remove the old jamb from the opening. Be cautious not to damage the surrounding drywall or framing.
- Clean and Inspect the Opening: Once the old jamb is removed, clean the opening to remove any debris or old sealant. Inspect the opening for any damage or rot. Repair any damage before continuing.
- Apply caulk around the exterior of the jamb where it meets the siding and trim.
- Use a backer rod to fill larger gaps before applying caulk.
- Choose a flexible, weather-resistant caulk suitable for exterior use.
- Prepare the surface by cleaning and sanding any rough edges.
- Apply a high-quality exterior paint that matches the surrounding trim and siding.
- Use two coats of paint for best results.
- Use a caulk gun to apply the sealant evenly.
- Tool the caulk using a damp finger or caulk-finishing tool.
- Allow the caulk to cure fully before painting.
- New door jamb
- Pry bar
- Hammer
- Nails or screws
- Caulk gun
- Caulk
- Remove the old door jamb.
- Install the new door jamb.
- Caulk the door jamb.
- The jamb is cracked or damaged.
- The door is not level or plumb.
- The door is difficult to open or close.
- There is water leaking into the house around the door.
Level and Square the Opening
This crucial step ensures that the new jamb will be installed plumb and level. Follow these steps for precise leveling and squaring:
| Tools Required | Procedure |
|---|---|
| Level | Place the level against the sides and top of the opening to check for level. Adjust the studs or shims as needed. |
| Square | Extend the square from a corner of the opening to check for square. Adjust the framing until the square reads 90 degrees. |
| Chalk Line | Snap chalk lines along the studs to mark the exact location of the new jamb. This will serve as a guideline for installation. |
Installing the Head Jamb
1. Cut the head jamb to length. Measure the width of the door frame opening from jamb face to jamb face, and transfer this measurement to the head jamb. Cut the jamb to length using a miter saw at a 45-degree angle.
2. Install the jamb over the door frame. Position the head jamb over the door frame opening, aligning the bottom edge of the jamb with the top of the door frame. Secure the jamb to the frame using nails or screws.
3. Level the jamb. Check the jamb for level using a level or straightedge. If the jamb is not level, shim it as needed using shims or wedges.
4. Adjust the fit of the jamb. To adjust the fit of the jamb, use a pry bar to gently pry the jamb in or out as needed. Be careful not to pry the jamb too far, as this can damage the jamb or the door frame.
| Adjusting the Fit of the Jamb |
|---|
| Inward Adjustment: Pry in at the bottom of the jamb to move it towards the door frame. Outward Adjustment: Pry out at the top of the jamb to move it away from the door frame. |
| Over-Adjustment: Do not pry too far, as this can damage the jamb or door frame. |
Installing the Side Jambs
1. **Measure and cut the side jambs:** Measure the height of the doorway from the top of the head jamb to the bottom of the threshold. Transfer these measurements to the side jamb lumber and cut them to size using a miter saw.
2. **Install the side jambs on one side of the doorway:** Place the side jambs in position on one side of the doorway, ensuring that they are flush with the inside edge of the head jamb and threshold. Use shims as needed to align and level the side jambs.
3. **Secure the side jambs:** Drive screws through the side jambs into the framing of the door opening. Use 2-inch exterior screws spaced approximately 6 inches apart.
4. **Repeat for the other side of the doorway:** Follow the same steps to install the side jambs on the other side of the doorway.
5. **Install the weatherstripping and strike plate:** Apply weatherstripping along the inside edge of the side jambs to create a seal against the door. Install the strike plate on the side jamb where the door latch will engage. The strike plate should be slightly recessed into the side jamb to ensure a smooth latching operation.
| Material | Quantity |
|---|---|
| Side Jamb Lumber (1×6 inches) | 2 |
| Exterior Screws (2 inches) | 16-20 |
| Weatherstripping | 1 roll |
| Strike Plate | 1 |
Installing the Weatherstripping
Step 1: Inspect the Old Weatherstripping
Carefully remove the old weatherstripping to examine its condition. Determine the type of stripping used, whether it’s foam, rubber, or silicone.
Step 2: Clean the Surfaces
Use a damp cloth or cleaning solvent to remove any dirt, debris, or old adhesive from the door frame and jamb surfaces where the weatherstripping will be installed.
Step 3: Determine the Right Type and Size
Select weatherstripping that matches the profile of the old stripping and fits snugly around the door when closed. Choose a material that is compatible with the door’s surface and weather conditions.
| Weatherstripping Type | Advantages |
|---|---|
| Foam | Insulates well, inexpensive, easy to install |
| Rubber | Durable, weather-resistant, provides a tight seal |
| Silicone | Highly weather-resistant, flexible, good for curved surfaces |
Step 4: Position the Weatherstripping
Align the weatherstripping along the door frame or jamb, starting at the top and working your way down. Ensure that the stripping fits snugly without any gaps.
Step 5: Apply Adhesive
Apply a thin layer of adhesive, such as weatherstripping glue or caulk, to the back of the weatherstripping. You can also use a weatherstripping tool to press the stripping into the adhesive.
Step 6: Secure the Weatherstripping
Press firmly on the weatherstripping to ensure it adheres properly. If nails or screws are required for additional support, drive them into the door frame or jamb at appropriate intervals to hold the stripping in place. Check for any drafts or air leaks once the weatherstripping is installed.
Securing the Jamb to the Frame
1. Drive 3-inch screws into the corners of the jamb, where it meets the frame.
2. Space the screws about 12 inches apart along the length of the jamb.
3. For added strength, drive 1-1/2-inch screws through the jamb into the framing studs behind it.
4. Space these screws about 16 inches apart.
5. If the jamb is still loose, you can add shims between it and the frame to tighten it up.
6. To do this, insert a shim into the gap between the jamb and the frame, and then tap it into place with a hammer.
Reinforcing the Jamb
7. Once the jamb is secure, you may want to add some reinforcement to make it even more sturdy. This is especially important if the door is large or heavy. To reinforce the jamb, you can install a metal angle bracket on the inside of the jamb.
| Step | Description |
|---|---|
| 1 | Cut the angle bracket to fit the length of the jamb. |
| 2 | Attach the angle bracket to the jamb with screws. |
| 3 | Repeat this process on the other side of the jamb. |
8. With the jamb secured and reinforced, you can now install the door.
Finishing Touches
8. Caulk and Paint
Caulking:
Painting:
| Caulk Areas | Description |
| Head Jamb | Seal between jamb and siding above the door. |
| Side Jamb | Fill gaps between jamb and siding on both sides. |
| Sill Jamb | Seal the joint between the jamb and the threshold. |
| Trim | Caulk where jamb meets window trim, siding, or fascia. |
Tips for Caulk Application:
Tools and Materials You’ll Need
To replace an exterior door jamb, you’ll need the following tools and materials:
Step-by-Step Instructions
Tips for Replacing an Exterior Door Jamb
Here are a few tips to help you replace an exterior door jamb:
1. Choose the right type of door jamb.
There are two main types of door jambs: wood and metal. Wood jambs are more traditional and are available in a variety of styles. Metal jambs are more durable and are less likely to rot or warp. Choose the type of jamb that best suits your needs and budget.
2. Measure the door opening.
Before you purchase a new door jamb, you need to measure the door opening. The width of the door opening should be 2 inches wider than the width of the door. The height of the door opening should be 1 inch taller than the height of the door.
3. Cut the new door jamb to size.
Once you have measured the door opening, you can cut the new door jamb to size. Use a miter saw to cut the jambs at a 45-degree angle. This will create a tight fit when the jambs are installed.
4. Install the door jamb.
To install the door jamb, start by placing the bottom jamb in the door opening. Level the jamb and secure it with nails or screws. Then, install the side jambs. Make sure that the jambs are square and that there is a 1/4-inch gap between the jambs and the door.
5. Caulk the door jamb.
Once the door jamb is installed, you need to caulk it. Caulk will help to seal the gaps between the jambs and the door, and it will also help to prevent water from leaking into the house.
6. Install the door.
Once the door jamb is caulked, you can install the door. To install the door, lift it into the door opening and align it with the jambs. Secure the door with nails or screws.
7. Trim the door jamb.
Once the door is installed, you need to trim the door jamb. Use a utility knife to trim the jambs flush with the wall. You can also use a sanding block to smooth the edges of the jambs.
8. Paint or stain the door jamb.
If you want to change the color of the door jamb, you can paint or stain it. Use a paint or stain that is specifically designed for exterior use.
Troubleshooting Common Issues
Replacing an exterior door jamb can involve some common issues. Here are some troubleshooting tips to help you resolve any problems you may encounter:
1. Door is not Square
The door should fit evenly in the jamb, which can cause the door to be out of square. Use a level to check the door in both directions and make sure that the jamb is level both vertically and horizontally.
2. Door is not Plumb
The door should be plumb, or straight up and down when it is closed. To check if the door is plumb, use a level and place it against the edge of the door stop on both sides of the jamb. If the level shows that the door is not plumb, it may be due to the frame or jamb being out of square. Check the frame and jamb for any signs of damage or warping, and replace or repair as needed. If the door is not plumb vertically then the door will stick on the latch side at the top or the bottom, depending on which way it is out of plumb, when it is being closed. When it is being opened, it will stick on the hinge side at the top or bottom.
3. Door is too Narrow or Too Wide
The door should be a snug fit in the jamb, but it should not be too tight or too loose. If the door is too narrow, it will be difficult to open and close. If the door is too wide, it will not seal properly against the weather stripping, and air and water may leak in.
4. Door is too High or Too Low
The door should be the correct height for the jamb, and it should seal against the weather stripping at the bottom.
5. The Door is Too Loose in the Jamb
The door should be securely attached to the jamb, but it should not be so tight that it is difficult to open or close. If the door is too loose, it may rattle or squeak when it is opened or closed. If the door is too tight, it may be difficult to open or close, and it may put stress on the jamb and the door.
6. Jamb is not Level
The jamb should be level both vertically and horizontally. If the jamb is not level, the door may not fit properly or it may not open or close smoothly.
7. Jamb is not Square
The jamb should be square, meaning that the sides should be perpendicular to each other. If the jamb is not square, the door may not fit properly or it may not open or close smoothly.
8. Jamb is Damaged
The jamb may be damaged by rot, insects, or other factors. If the jamb is damaged, it may not be able to support the door properly, and the door may not fit or function properly.
9. Jamb is Not Installed Properly
The jamb may not be installed properly, which can cause the door to fit or function improperly. If the jamb is not installed properly, it may be necessary to remove the jamb and reinstall it.
10. Weather Stripping is Not Installed Properly
The weather stripping is not installed properly, which can allow air and water to leak into the home. If the weather stripping is not installed properly, it may be necessary to remove the weather stripping and reinstall it.
How to Replace an Exterior Door Jamb
Replacing an exterior door jamb is a relatively simple task that can be completed in a few hours. By following these steps, you can ensure that your new jamb is installed correctly and will provide years of trouble-free use.
Step 1: Remove the old jamb
Use a pry bar to carefully remove the old jamb from the door frame. Be careful not to damage the door frame or the surrounding drywall.
Step 2: Install the new jamb
Place the new jamb in the door frame and secure it with screws. Make sure that the jamb is level and plumb.
Step 3: Shim the jamb
Use shims to level the jamb and ensure that it is plumb. Shims are thin pieces of wood or plastic that can be inserted between the jamb and the door frame.
Step 4: Install the door
Once the jamb is installed, you can install the door. Hang the door on the hinges and make sure that it swings freely.
Step 5: Caulk the jamb
Caulk the jamb around the edges of the door to seal any gaps and prevent water from leaking in.
People Also Ask About How To Replace Exterior Door Jamb
What is a door jamb?
A door jamb is the frame that surrounds a door. It consists of two vertical pieces (the legs) and a horizontal piece (the head).
What are the signs that I need to replace my door jamb?
There are several signs that you may need to replace your door jamb, including:
How much does it cost to replace a door jamb?
The cost to replace a door jamb will vary depending on the size of the door and the materials used. However, you can expect to pay between $100 and $500 for labor and materials.
