Press along the insulating strip so that it sets properly into the channel 5. To be sure that the channels remain in place, nail your plastic insulators to the channel with small finishing nails and your tack hammer. Be sure that you nail flush to the insulation so that the window will not snag with the nails. To seal the gap between the top and bottom sash, use a plastic adhesive V-channel on the top rail on your bottom sash. Be sure that your stripping opens towards the top of your window.
Casement windows are simpler to insulate with permanent weather stripping.
Using a damp rag, wipe clean all four sides of the outside of the window stop. Use adhesive foam stripping on all four sides of the window stop. Be sure that the temperature is not below 50 F as the adhesive will not stick. After you have pressed the foam into place, go over the foam a second time with your finger so that you create a tight bond. Click here .