How to reduce the vulnerability of chimneys
- Use of metal step flashing at roof-to-siding intersection (flashing extending up the wall) can reduce the vulnerability to embers.
- Cover chimney and stovepipe outlets with a noncombustible screen. Use metal screen material with openings no smaller than ⅜-inch and no larger than 1⁄2-inch to minimize embers leaving the chimney.
- Close the fireplace flue during fire season when the chimney is not in use.