6 Ways to Install Replacement Windows – wikiHow

Steps

1

1

Take the width measurement from inside-to-inside of the window frame.

2

3

Check the window frame for plumb and level. Since the new unit will need to be installed at least close to plumb, adjust your measurements accordingly. This will ensure that you have the largest size window that can be installed plumb, and level in the opening provided.

4

Reduce both the width and height measurements by by 1/4. This is due to the fact that replacement windows are made to order in increments of 1/4.

1

2

1

Use a putty knife or flat-bar to remove any old sealant or paint chunks from the inside of the jambs, the exterior window stops, and the inside edge of the windowsill. If the original window was an older, weighted window, there may be pulleys at the top of the jamb that need to be removed. Clear any dust from the bottom corners of the frame to ensure a good bond with the sealant.

2

Clean the surrounding area thoroughly. If there were weights, remove the pulleys and apply a small amount of caulk to any holes.

1

Locate the sill flashing and the four long installation screws after unwrapping the new vinyl window and discarding of that pesky header expander. Sill flashing for a vinyl window is an L shaped piece of vinyl that is the same width as the replacement window unit. The vertical part of the L shape is slotted, allowing it to clip onto the bottom, outer edge of the window unit and shed water away from the bottom of the window.

2

Lay the sill flashing centered on the windowsill. Mark both sides where it hits the exterior window stops. Remove the lower part of the L shape on both sides as marked to allow the sill flashing to fit into place. Once trimmed, lay the sill flashing back in place and trace the outside edge with a pencil.

3

Apply a 3/8 bead of silicone or silicone fortified sealant to the inside surface of the exterior stops. Make sure you get both sides and the top. Then, apply a 1/4 bead directly to the wood sill on the inside of your pencil line.

4

Snap the sill flashing onto the bottom, outer rim of the new window unit.

5

6

Using the four provided screws, fasten the window to the frame at the four pre-drilled locations. (These are usually located about four inches from the top and bottom on both sides.

7

Tighten the screws until they hold the window firmly in place. Be sure the window is centered in the window opening. (Keep in mind that vinyl is much softer, and more flexible than wood. Over-tightening the screws can damage the frame of the window.)

1

Fully close and lock the window.

2

Fully open the window by lifting the bottom sash.

3

4

Stop adjusting once the gap is even.

1

Use a rag with water or paint thinner (depending on your choice of sealant) to clean any excess sealant from the frame of the window.

2

Check the perimeter of the window for good contact with the exterior window stops. If necessary, apply a thin bead around the perimeter to eliminate any voids, and leave a smooth, weather-tight seal.

Ask a Question

If this question (or a similar one) is answered twice in this section, please click here to let us know.

Loading...

Upload error

Thanks to all authors for creating a page that has been read 18,782 times.

Yes No

See the rest here:
6 Ways to Install Replacement Windows - wikiHow