How to Curve Weatherseal

Double-Hung Arched or Curved Window

• 1

  Open the window so that the tracks of the inner sash are exposed. Clean the tracks with a damp rag. Shut the window and lower the upper sash. Clean the upper tracks as well. Wait 15 to 30 minutes for the tracks to dry.

• 2

  Unfurl a section of weatherseal. Measure out a length of weatherseal by holding it against the track. The weatherseal should press against the bottom of the track and extend 2 inches above the bottom of the sash. Check the positioning of the strip to ensure it is snug and level.

• 3

  Cut a piece of weatherseal that is 1 inch longer than the piece you measured.

• 4

  Lay the weatherseal on the ground and use the cut piece to measure a second piece.

• 5

  Peel the plastic liner off of the back of the weatherseal. Leave a 2-inch long section of lining on one end of the seal. Hold the strip vertically so that the end with the liner is on top.

• 6

  Press the bottom of the weatherseal to the base of the sash track. Ensure that the end of the tape is flush with the frame. If the strip is V-shaped make sure that the point of the V faces the interior of the room.

• 7

  Grip the end of the tape that has the liner and tuck it up between the sash and track.

• 8

  Repeat Steps 5 through 7 to place weatherseal on the other side of the sash.

• 9

  Close the lower sash completely. Remove the lining from the end of the weatherseal that protrudes above the sash. Press the seal against the track. Repeat on the opposite side of the window.

• 10

  Lower the upper sash. Repeat Steps 1 through 10 to attach weatherseal on either side of the sash.

• 11

  Measure the width of the bottom edge of the lower sash with a measuring tape. Check the measurement. Cut a piece of weatherseal to this length. If the base of the sash is curved use a flexible, seamstress tape to take the measurement.

• 12

  Remove all of the lining from the back of the weatherseal and press it into place on the bottom edge of the lower sash with the point of the V facing the interior of the window. If the sash is curved, press the weatherseal on in 1-inch sections, gradually bending the stripping to accommodate the bend.

• 13

  Repeat Steps 11 and 12 to place weatherstripping on the top of the upper sash.

Single-Sash Circular Casement Window

• 14

  With the window closed lightly trace the outline of the window pane where it meets the jamb. Use a pencil or chalk.

• 15

  Open the window fully.

• 16

  Measure the circumference of the window jamb from the bottom of the hinge, up around the frame, to the top of the hinge. Check all measurements.

• 17

  Cut a single piece of weatherseal the length your measurement.

• 18

  Clean the window frame where the weatherseal will be installed. Remove the pencil markings.

• 19

  Remove one quarter of the lining from the weatherseal, exposing only a section of the strip.

• 20

  Start applying the weatherseal at the bottom of the hinge. If the weatherseal is V-shaped, ensure that the point of the V is facing the interior of the room.

• 21

  Remove another section of lining once you finish applying the first section. Continue applying the weatherstrip, pressing it firmly in place, until you reach the opposite side of the hinge.