Measuring Your Windows

New Construction

The window and patio door sizes for Viwinco new construction products are usually established by the homeowner and/or contractor. The rough opening is then constructed per the window size. Make sure the opening is 1/2" larger than the window in both width and height. When ordering Viwinco windows or patio doors, be sure to give the width measurement first, and then the height.

Replacement

The window and patio door sizes for Viwinco new construction products are usually established by the homeowner and/or contractor. The rough opening is then constructed per the window size. Make sure the opening is 1/2" larger than the window in both width and height. When ordering Viwinco windows or patio doors, be sure to give the width measurement first, and then the height.

Click the image below to view full-size, step-by-step
measuring instructions for New Construction windows.

nc-measuring guide - thumbnail

Click the image below to view full-size, step-by-step
measuring instructions for Viwinco's Replacement windows.

How to measure replacement windows - thumbnail image

Note: Accurate measurement of the old window frame is the key to a perfect fit. Examine the old windows to determine how they are installed into the rough opening. When ordering, please state the measurements taken for the window width first and then the height. Make sure, as is explained in Step 3, that the window dimensions conveyed in your order are 1/2" smaller in width and height than the rough opening. 

Exactly where the actual measurement is taken may vary depending on the type of window being replaced and the wall construction type. In some cases, the interior/exterior trim may have to be removed to obtain an accurate measurement.