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Measuring a Door

To determine the size of a replacement door, measure the height, width and depth of the Slab. Note: If a door has shrunk this will not be an accurate way of measuring. If the door is arched, it is a bit more complex. It is recommended that a professional perform the measuring.

Measuring a Rough Opening

For windows, pre-hung doors and entire entrance units requiring a jamb or frame, a rough opening will need to be measured. It is recommended that the existing material be removed first. The height, width and depth of the opening will be needed.

How to Install a Replacement Window

It is recommended that you use a professional JB Sash installer. If you prefer to do it yourself, here are some helpful hints:

• Remove the old window sash. Make sure you get precise opening and window measurements BEFORE removing the old window sash. Many windows in older homes are painted with lead based paint. Please use proper precautions to minimize exposure to harmful dust. Do not remove the frame!
• Weatherproof the frame. Polyurethane sealant was placed around the existing window frame for weatherproofing. Before installing the new unit, verify that the installation screws will fasten into solid wood.
• Install the new window. Check the new window for squareness by making sure the diagonal measurement from corner to corner is within 1/16 inch in both directions. Set the bottom of the new window in first, and then tilt the top into place. Thin wedges (shims) are inserted until the unit is centered and sitting plumb and square. Secure the window in place by screwing it firmly into solid wood. Apply low pressure insulating foam between the new and old window frame as well as a high quality exterior seal.
• If there are any problems with the operation of the new window, re-check the shim locations and adjust for plumb and square.