Strength of window

Question

Windows are approximately 271/2 inches wide by 29 inches.  There is no stamp on the current channels that match your guide.  Can you tell me what strengh I should purchase?

Bob · Accepted Answer

I can't really tell you from this information what you'd possibly need. If there's no stamp option, the only way to choose is to obtain the exact weight of the window sash. You can then match that exact weight with one of the weight ranges alongside each stamp option on the shop page.