How to Build a Cupola: Step-by-Step Pictures and Instructions

Text by Mac Wentz, Photography by Robert Brantley and Mike Krivit
This cupola may look like the work of a master carpenter, but it is an intermediate-level project. Read an introduction to the tools, techniques, materials, and approximate cost for building a cupola.
From The Family Handyman
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How to Build a Cupola: Step-by-Step Pictures and Instructions
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1. Bevel 2x6s on a table saw. To cut the pieces that will form the sill of the cupola, bolt a 1x6 to the saw’s fence (to keep the workpiece from tilting), set the blade at 19 degrees and position the fence 3/4 in. from the blade. To bevel the soffit parts, set the blade at 45 degrees and the fence 4-1/4 in. from the blade. To make bevel cutting easier, we first cut 2x6s into 30-in. sections. When all eight pieces are beveled, sand them and then miter the ends at 45 degrees. Save the beveled cut-offs from the sill and rip about 1/4 in. off them. You’ll use them later to complete the slope of the sill (Photo 4).
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Good article, but there are some possible problems that aren't addressed. 1. The cupola should be properly grounded with a Class I or Class II lightning protection cable, extending from a U.L. approved air terminal to a properly installed ground rod. Check local codes. 2. The 3" screws that are shown anchoring the cupola are insufficient for the wind loads on this size cupola. Use through bolts. 3. When you open a hole in the roof, blow in rain can enter too through louver blades.

By dengland57, on 06/02/2009

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