Replace Casement Windows with Double Hung Windows Part 2

What You'll Need
New double hung window
Corrosion resistant nails
Pry bar
Nail puller
Utility knife
Caulk gun and caulk
Tape measure
Interior molding
Carpenter square
Protective overalls and working gloves

This is Part 2 of a 2 part series. To return to Part 1, click here.)

Double hung windows can be used to replace casement windows as they are almost similar in material used to manufacture them and they can fit right on available openings. They have 1 or 2 sashes which can be moved up and down in grooves located at the side of the jambs. They are easy to install and can be used to let in air by opening the top or bottom half at a time.

Step 1 – Measure Window Opening

It is important to make sure that the measurements are as accurate as possible. Use a tape measure to get the width of the window, position it at the top, middle and bottom part and write down the three figures.

Get the height of the new window by positioning the tape measure at the head of jamb to the slopped sill. Note down the measurement.

Step 2 – Remove Old Window

Remove the trim using a hammer and pry bar and gently remove glass panes from the frame. This reduces the risk or glass breaking when removing the frame. If the window has a flange around it, cut the exterior siding that covers it. A circular saw can also be used to cut through exterior siding. Use a pry bar to loose the siding and remove it from the opening.

Use a nail puller to remove nails from the frame and lift it from the opening.

Step 3 – Prepare the Surface

Check if the new hung window fits in correctly in the opening. If the rough opening is slightly wider than the window, layer it with pieces of lumber on the sides and secure them using pneumatic nails gun.

On the new hung window, bend out the nailing flange. This portion makes it easy to attach the window to the framing of the house and provides a good seal.

Step 4 – Install Hung Window

Load the caulk gun and lay a bead at the center of the flange. This keeps out moisture and it serves as an air seal. Lift the window hung and position it in the opening, begin by setting the bottom of the window on the sill. Gently push the middle and the top parts until they get into place. Make sure that the flange is in contact with the frame.

Step 5 – Secure Hung Window

Check that the window lies evenly and comfortably in the opening. Use the level and shims to make adjustments. Secure the flange into the frame using rust resistant galvanized nails and a hammer. Apply a bead of caulk on the edge of the siding, leave it to dry. Use strips of wood to fill gaps and nail the strips in place.

Attach the trim at the top and work around the window and secure it using rust resistant nails and apply a bead of caulk around the trim. Remove excess caulk and smooth it.

Step 6 – Finish Up on the Inside

Use jamb extensions to extend the jamb, if it is necessary, with a pneumatic pin nailer. However, if the window sits in well in position attach interior molding to secure the window.