
How to repair/replace exterior window casing?
- Take Off the Old Casing. With the help of a wooden block placed against the window, take the old casing off using a...
- Waterproof the Window. Use an adhesive-backed window flashing to make the casing and window resistant to water. With...
- Get the Measurements in Place. Use a measuring tape to determine the length of...
How to replace window casing?
- Paint-grade fiberboard casing
- Paint-grade 3-inch medium-density fiberboard (MDF)
- Paint-grade 3 1/2-inch MDF
- 2 1/2-inch rosette corner blocks
- Miter box or miter saw
- Measuring tape
- Level
- Hammer
- 6D 2-inch finish nails
- Wood shims
How to install casing around a window?
How to install DIY window casings (window trim) Step 1 – Trim away any excess insulation and drywall. If you’re starting with newly installed windows like I am, the first thing you’ll want to do is make sure that the drywall is cut flush with the framing around the window, and also make sure that there’s no excess insulation that will get in the way.
How to repair water damaged window casings?
Repairing Damaged Window Casings
- Remove the Damage. When window casings become damaged by water, they can rot and crack, and mold can form. ...
- Clean the Window Casings. The materials you will be using to repair the window casings are sensitive to moisture, dirt, and oils.
- Repair the Window Casings. Wood putty is the best material you can use to repair window casings. ...
- Sanding and Finishing. ...
How to repair rotted window casing?
To replace door casing, such as brick mold:
- Use a utility knife to cut through the paint and caulk where the casing meets the door jamb, siding, and miter joint.
- Use a flat pry bar to remove the door casing, being careful not to damage adjoining surfaces.
- Use a putty knife or chisel to remove any old caulking or thick layer of paint on the door jamb or siding.

How do you replace a rotted window casing?
6:289:42Replacing Rotted Window Trim - YouTubeYouTubeStart of suggested clipEnd of suggested clipCut them from behind pull the siding out slightly. Slide the flashing underneath there and have aMoreCut them from behind pull the siding out slightly. Slide the flashing underneath there and have a little bit stronger repair.
How do you repair interior window trim?
Having everything you need readily available will help make the repair process go faster and smoother.Spot Finish Wooden Interior Trim. Old trim has a classic and timeless look. ... Clean the Trim. ... Sand and Scrape Damaged Areas. ... Sand and Fill Small Holes. ... Apply New Stain. ... Add the Finish. ... Remove the Trim. ... Sand.More items...•
How do you fix exterior window trim?
0:203:40How to Repair Decayed Window Trim - YouTubeYouTubeStart of suggested clipEnd of suggested clipThis flange is exposed over the waterproofing or the weather proofing on the wall that's not theMoreThis flange is exposed over the waterproofing or the weather proofing on the wall that's not the correct way to install a window. The other thing that I've identified.
How do you fix rotted wood around a window?
Method for wood rot repair on windowsDetermine the amount of rot. Your first step is to identify the rot and the amount of rotten wood there is. ... Remove the rotted areas. ... Drill some holes. ... Apply the wood hardener and filler. ... Sand the area down. ... Paint the wood.
How do you fix trim molding?
0:466:31The Holy Grail of Baseboard Repair!!! - YouTubeYouTubeStart of suggested clipEnd of suggested clipTwo any kind of wood glue will work for this and then you're gonna need some wood filler i like thisMoreTwo any kind of wood glue will work for this and then you're gonna need some wood filler i like this stuff from the home depot it comes in a squeeze tube it's elmer.
How do you repair a cracked trim?
1:548:40Cheap Fix for Small Cracks in Your Baseboard and Trim ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd you are just going to gently lay a bead of caulking. Into the corner where the crack is and thenMoreAnd you are just going to gently lay a bead of caulking. Into the corner where the crack is and then once your bead is applied. Just take your finger. And squeegee off the excess.
What is the exterior trim around a window called?
Exterior window casings are the moldings that go around your window frames. They are installed outside the house, covering the space between the window frame and wall.
What is the wood around windows called?
The terms window casing and trim are used interchangeably to describe the decorative wood that surrounds the perimeter of the window to cover the space between the wall and jamb.
How much does it cost to replace exterior window trim?
Exterior trim is protective and decorative, as it bridges the gap between the siding and the window. The cost to install exterior trim is $1,790 for the average home. It costs around $4 per linear foot for low-end materials and $7 per linear foot for high-end ones, including $88 per hour for labor.
How do you repair a rotted window frame and a sill?
1:174:24How to Replace a Rotted Windowsill | This Old House - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow we have to break these pieces off down the ends. And for this side i'll use the chisel. I haveMoreNow we have to break these pieces off down the ends. And for this side i'll use the chisel. I have to get these nails out of here using my end nippers.
How much does it cost to replace wood around a window?
Window Frame Repair Costs by MaterialMaterialAverage Cost to Replace or RepairWood$100 - $350Aluminum$150 - $350Vinyl$150 - $500Fiberglass$300 - $6001 more row•Jan 10, 2022
How do you fix water damaged wooden window frames?
Remove all dust and wood particles.Apply a thin layer of wood epoxy primer to the damaged area with a brush. Wait 10 minutes for it to dry.Stir the wood epoxy filler and apply it to the damaged area, using a putty knife. ... Prime and paint the sill to seal it from any future weather/water damage.
How do you install exterior window trim?
0:025:29How to Trim an Exterior Window | This Old House - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo we start with a piece of flat stock that will go around like that okay and then you take yourMoreSo we start with a piece of flat stock that will go around like that okay and then you take your side piece your side casing and you'd slide it up tight to it and have what is called a butt cut yep.
Can you replace exterior window trim?
To begin replacing the trim, carefully pull the old trim off and use it as a guide to cut the new trim to size. Installing the new trim is as simple as nailing it onto your house and sealing the edges with caulk.
How do you replace an exterior trim board?
1:069:16Repair Trim Rot (Skirt Board and Corner Board) - YouTubeYouTubeStart of suggested clipEnd of suggested clipI then switch over to an oscillating multi-tool with the wood blade in it to make the cut throughMoreI then switch over to an oscillating multi-tool with the wood blade in it to make the cut through that line I start by just carefully edging the line with the blade.
How do you install exterior trim board?
0:0718:23INSTALLING EXTERIOR PVC TRIM & FLASHING // Not So Tiny ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd next i can move on to installing the exterior trim the first pieces of trim i needed to installMoreAnd next i can move on to installing the exterior trim the first pieces of trim i needed to install were along the underside of the blocking between the exposed rafter tails.
How to smooth out trim?
Use the block sanding sponge to smooth out the surface of the trim to match the crevices of the trim.
How to get dust off a sanding board?
Wipe off the excess dust from sanding with a wash cloth.
What is the best way to repair window casings exposed to the elements?
Use exterior caulk to repair window casings exposed to the elements.
How to treat mildew on window casings?
Use a mixture of 1 part bleach to 3 parts water to treat mildew. Use scissors to cut the caulk tube if the caulking gun is void of a cutting tool. Use exterior caulk to repair window casings exposed to the elements. Wear a dust mask when you sand.
How to remove flaking paint from a wall?
Remove any flaking paint with a putty knife. Sand the area smooth, using a fine-grit sanding pad, and wipe the sanding dust with a clean, damp cloth.
How to fill cracks in a gun?
Place the tip of the tube at the beginning of the crack and slowly squeeze the trigger of the gun to start the flow of caulk. Steadily move the tip along the crack to fill it with a smooth bead of caulk. Cau lk about 2 feet and stop to smooth the bead with your finger. Wipe excess caulk with a damp cloth.
How to cut a tube of waterproof caulk?
Cut the tip on a tube of latex waterproof caulk at a 45-degree angle, using the cutting tool on a caulking gun. Insert the tube into the caulking gun and push the plunger forward until it touches the tube.
How to clean a window with mildew?
1. Apply a mildewcide cleaner to any mildewed areas and allow it to penetrate. Wash the window casings with a degreasing cleaner to remove dirt, mildew and greasy residue.
How to sand a filler?
Sand the filler smooth to the surface, using the fine-grit sanding pad. Wipe the sanding dust with a clean, damp cloth.
How to smooth down bead on window?
There will probably be gaps between the window trim and the window frame that need to be filled with caulking. Dip your index finger in water and use it to smooth down the bead after you've applied it to improve the look.
How to get mitered corners on window?
If you need it to fit over a space equivalent to the old one, make sure your measurements match up accordingly. Then, get mitered corners by marking a 45-degree angle at the top of the length, starting at one edge and extending it past the total width of your trim.
Can you lay window trim on top of new trim?
If you saved the old pieces of window trim, you will be able to lie these on top of the new lengths of material and outline them with a pencil.
Is it important to keep interior window trim in good condition?
Protective finish. While interior window trim might not be as susceptible to damage as exterior trim, it is still important to keep it in good condition. Over time the trim will start to deteriorate no matter what you do, and this means you need to find out how to repair and replace it.
How much does it cost to repair a crack in a vinyl window?
You can repair most cracks and holes in vinyl window frames for under $15 with a simple kit from your local home improvement store and just 30 minutes of your time. Best of all, these repairs can help you better insulate your home and prevent air leaks.
How much does a vinyl window repair kit cost?
DIY vinyl window repair kits can be picked up at just about every home improvement store or online for about $14.
How long does it take to repair a vinyl window?
Most small cracks and holes can be quickly repaired with a vinyl window repair kit in just 30 minutes. Choosing to repair rather than jumping straight to window replacement can save you thousands of dollars. Repairing a single crack or hole in just one vinyl window frame can save you as much as $20 annually in energy efficiency improvement alone.
What happens if your window seal is broken?
A window that appears foggy or hazy is usually a good indicator that your window seal is broken. When this happens, condensation builds between the panes of glass and decreases the energy-efficient insulation properties of your double or triple-pane windows.
How long does it take for vinyl to dry?
Once you have your materials ready, it’s time to start your vinyl window repair. It’s best to begin in the evening or on an overcast day, as adhesive needs 24 hours to dry, and direct sunlight can lead to warping. If that’s impossible, position an umbrella or sunshade over the window to prevent direct sunlight from hitting the window.
How to measure for vinyl repair?
Using a tape measure, measure each crack and hole, taking note of your measurements. Then, add all needed repairs together to determine how much vinyl is required. Take your time to measure each issue twice, so you don’t run out of material during the repair process.
How long do vinyl windows last?
The average vinyl window should last about 10-20 years. If your windows are newer than that, it’s almost always more sustainable to seek a repair first. Replacing an entire window costs $400-$600 each. A professional repair runs about $175 per window, saving you a great deal of money. Repairing also reduces unnecessary waste.

Step 1 – Remove The Damage
Step 2 – Clean The Window Casings
- The materials you will be using to repair the window casing are sensitive to moisture, dirt and oils. After the damaged wood has been removed, clean up the window casings. Mix several drops of oil-free soap with warm water, until it foams. Submerge a sponge in the soapy water and squeeze out the excess. Wipe down the window casings, to remove the oil and dirt. Dry the wood with a …
Step 3 – Repair The Window Casings
- Wood putty is the best material you can use to repair window casings. It is soft enough to fill in any kind of damage. If you have cracks, gouges or pieces of wood removed from the window casing the wood putty will repair it. Use a plastic putty knife that is flexible. This will allow the putty to get deep within the damage. Apply wood putty to the...
Step 4 – Sanding and Finishing
- Wood putty will lighten when it is dry, and it should only take an hour for small repairs. Large repair jobs, like deep fills, can take a day or more to dry. The drying time varies, depending on humidity and temperature. Use the fine-grit sanding block to sand down the repaired window casings. The wood putty needs to be smooth to the touch, and even with the rest of the wood th…