Installing Pella Windows Altadena CA

Pella manufactures great quality windows that are fairly easy to install.

1. To install a Pella window, first verify that your opening is the correct size for the window and that it is plumb, level, and square. The correct opening size is usually indicated by a sticker on the Pella window.
2. Next, install pan flashing to the sill of the opening. This is six to nine inch wide rubberized tape installed in such a way that water from condensation will flow outside from under the window rather than being trapped in the wall.
3. Now, remove the packaging material from the Pella window and fold the integral nailing fin 90 degrees from the jamb (if equipped).
4. With a helper, heft the window into the wall opening. As your helper holds the Pella window from falling out on the outside, go inside and verify that the window is level horizontally and that it is centered in the opening. Shim as needed to level it. Once level, two roofing nails can be pounded through the nailing fin at the bottom to hold the window from shifting.
   
   The person outside should now check to verify that the window is square. To do this, measure the diagonal distances between corners. If the numbers match, the window is square. If not, shim as needed to make the window square.
   
   Once the Pella window is square, the nailing can be completed. As the outside person nails, the inside person should verify that the jamb of the window is flush to the interior finished wall surface. Nail spacing should be about every 6". Now is a good time to verify that the window operates as expected.
5. Next, the Pella window flashing should be completed. A drip cap must be installed at this point. This is a piece of metal with two opposite bends that is installed at the top of the Pella window to prevent water from entering. Caulk is not an alternative to this step. Cut the drip cap with tin snips to match the width of the window and use roofing nails to attach the drip cap to the wall. Next, apply window wrap tape to the sides (overlapping the piece used at the pan flashing stage). And finally, apply a length of window wrap tape to the top of the window - over the drip cap and overlapping the two side pieces of window tape.
6. The Pella window is now completely installed and now ready for interior trim and exterior siding.

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