Spark arrestor

[Jeff Eastman]

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[Michael Thomas]

My though is that if it's clamped on tight enough to withstand high winds, the point-force at the flue tile might predispose it to cracks.

[Richard Stanley]

We have hundreds of them. The clamps hold ok, but, the rest of it corrodes and disintegrates after a few years. Flashing doesn't have any glaring defects - the crown perimeter may allow water penetration to the chase.

[Robert Stephens]

The flashing appears to be a 2 piece saddle and appears to be in good shape. However I would be concerned with seal at brick line.

[Richard Stanley]

Chimney caps with 5/8" mesh or with 3/4" mesh: What's the Difference? (http://www.fireplacemall.com/Article_Library/5_8__Mesh_Chimney_Caps/5_8__mesh_chimney_caps.html)

Here is more info.

Also - google - chimney spark arrestor