Chimney Safety & Fire Prevention Flashcards

Under NFPA 211, which event specifically triggers the need for a Level 2 chimney inspection?

Answer: Sale or transfer of the property

NFPA 211 calls for a Level 2 inspection on property sale or transfer, after a chimney fire or other damaging event, or when the system is changed.

A homeowner says they heard a loud roaring sound like a freight train coming from the chimney, with heavy smoke. What is most likely happening?

Answer: A free-burning chimney fire

Loud roaring, popping, and dense smoke are classic signs of a free-burning chimney fire.

Which creosote form is generally the hardest to remove and the most dangerous fuel for a chimney fire?

Answer: Third-degree glazed creosote

Third-degree glazed creosote is hard, shiny, and concentrated fuel that resists normal brushing.

What is the most effective way to reduce creosote buildup in a wood-burning system?

Answer: Burn well-seasoned wood with adequate air for a hot fire

Seasoned wood burned hot keeps flue gases warm, which reduces condensation of creosote.

Firewood is generally considered properly seasoned when its moisture content is below about what level?

Answer: 20%

Wood under roughly 20% moisture burns cleaner and hotter, producing less creosote.

Which finding during an inspection is a common indicator that a past chimney fire occurred?

Answer: Puffy, honeycomb-like creosote and cracked flue tiles

Expanded 'honeycombed' creosote and heat-cracked tiles are classic evidence of a prior chimney fire.

How should fireplace ashes be stored after removal?

Answer: In a metal container with a tight lid on a noncombustible surface away from the house

Ashes can hold live embers for days, so they belong in a lidded metal container on a noncombustible surface away from buildings.