How to Replace a Double Hung Window Part 2 How to Replace a Double Hung Window Part 2

What You'll Need
Putty Knife
Adhesive Remover

Now you are ready for the final steps to replace a double hung window. After measuring and ordering your replacement window and removing the old window, you are ready to begin the installation process for the replacement window. (This is Part 2 of a 2 part series. To return to Part 1, click here.)

Most windows will come with manufactures installation instructions that can give additional directions or tips for installation of the window. You should review the included instructions for the window to ensure you are following all suggested guidelines.

Step 3 - Prepare Window Frame

Before installing the new window, you need to prepare the frame, frame parts and window sill.

The first step is to inspect the window sill for any damage and to remove any unnecessary parts. If there is damage to the sill, you should replace it, or repair the damaged areas. As well, if there is old caulking or sealant in the frame or sill, remove this as well. You can remove the sealant with a putty knife and adhesive remover. You should also remove any wood fill, shims or trim that is not necessary for the new window.

Place the new window into the frame to ensure the fit. You can determine if any filler blocks or shims will be necessary to create a secure and tight fit of the window into the frame. As well, you can predetermine the location of hardware and mark the location into the frame with a pencil or pen. Next, you can prepare the frame for installation by pre-drilling holes over the marks that you marked. If you are replacing the brackets in the frame, you can now install the new brackets. Next, you will need to install any necessary filler blocks by nailing them into place. If you are replacing any of the jamb liners, you can install them now as well. You need to make sure the jamb liners fit firmly against the frame.

Step 4 - Install the Window

Once the frame and window are ready, you will install the lower sash of the window first. Place the bottom sash into the frame as it will be installed and verify the sash is centered and level. You will need to check the sash with your level to verify the alignment is level in the window frame. If it is unlevel, an additional filler block may be necessary to level and align the sash into the frame. Once you have validated the sash will fit into the frame and remain level, you can place the bottom of the sash into the bottom of the window frame and slide the pivot pin into the appropriate furrow in the jamb liner. Next, you will snap the pin into the sash balance on each side of the sash. Now you can lift the sash into place and verify that it slides up and down.

You can follow the steps above to install the upper sash of the window.

Step 5 - The Finishing Steps

After completing installation for the double hung window, you will need to caulk around the window to create a weather barrier.

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