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Designing replacement window boxes

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Forum topic by DWDave posted 11-10-2018 07:18 PM 246 views 0 times favorited 1 reply Add to Favorites Watch
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DWDave

2 posts in 252 days


11-10-2018 07:18 PM

I need to make two large replacement window boxes. Each needs to be 60 inches long and ten inches high, and 6-8 inches deep.

These will be exposed to full sun/rain/snow in northwest PA, so full range of temp and humidity throughout the year. They need to be painted to match the trim, and since the wood siding above the windows is vertical, I planned to incorporate a vertical design to the wood on the front and side faces of the boxes, either individual tongue and grove pieces lined up side to side, or routed lines onto a solid wood panel.

How much do I need to worry about wood movement here? Even well-painted wood will move under these conditions, correct? Should I avoid wide boards altogether?

Would individual t&g pieces for the front and sides be best? They would need to sit inside a frame, but then they would not be able to help support the box, so the frame would need to be pretty beefy, right?

Looking for any advice at this point. Thanks.


1 reply so far

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lumbering_on

578 posts in 910 days


#1 posted 11-11-2018 01:07 AM

Unless you’re trying to make some elaborate design, or make it water tight, it’s not a big issue. Just make sure you either use pressure treated wood or something that handles weather well. It’s hard to notice gaps when you’re a long way from the wood.

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