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Fire Damage and Historical Church Buildings

Here are some major lessons from the fire at Notre Dame, as well as the other examples of fires in historic buildings.

The fire in Notre Dame again raises the question of whether fire protection measures in historic buildings are sufficient. The area where the fire started points to some refurbishment work that was being undertaken and may well have been a contributor to the fire.

Refurbishment work was also ongoing at the time of the fire in 2018 at the Glasgow School of Art. Clearly, there are questions over the controls that were in place for the renovations of these landmarks, and their lack of effectiveness as shown by the extensive damage suffered.

Here are some major lessons from the fire at Notre Dame, as well as the other examples of fires in historic buildings.

#1. Don’t dismiss fire protection

Often these older buildings contain combustible wooden construction and features. The collections they house in themselves may be combustible and could aid a fire in spreading.

Renovations should always include fire protection into the property. Such protection may well be intrusive, but it can help detect, delay or control fire spread.

The approach taken will need to be tailored to the property and should consider what is at stake in terms of the financial and cultural value of the building and its contents.

This should include active fire protection systems such as sprinklers. Such protection should not be summarily dismissed on the grounds of aesthetics or misguided views on their impact on the property.

#2. Automatic sprinklers should be used more in heritage properties

Automatic sprinklers have an excellent track record as a method to control or suppress fires in numerous types of occupancies. A recent study in the UK by the National Fire Chiefs Council placed the reliability and effectiveness in the 90th percentile.

Despite the effectiveness and reliability of this 150-year old fire protection technology, sprinklers can still be a controversial subject. The controversy is not about how a sprinkler performs during a fire, but rather the fear that sprinklers will open in small-fire or non-fire situations causing water damage to the building contents.

This is a common misconception reinforced by Hollywood about sprinkler systems – only sprinkler heads in the immediate vicinity of a fire will operate. Research carried out over 20 years shows that 80% of fires are controlled or extinguished by the operation of fewer than six sprinkler heads. Any water damage suffered is likely to be a fraction of that suffered should a fire be allowed to spread unimpeded.

#3. Control ignition source – especially amid risky hot work

Renovations that include hot work are a major risk. Hot work is any work that involves burning, welding, using fire- or spark-producing tools, or that produces a source of ignition.

Improperly managed welding, soldering or grinding has proven to be a leading cause of loss each year where flying sparks or hot particles can easily fall into contained, often inaccessible spaces, posing a fire threat.

This is especially true with historic properties, where wooden frames, combined with dust and oil that have built up over the course of hundreds of years, pose significant fire risk.

FM Global recommends a strong permit system to control such work. This would include a continuous fire watch during the hot work activity, throughout all break and lunch periods, and for at least one hour following the completion of hot work.

After the one-hour fire watch period, have the hot work area monitored for up to an additional three three hours.

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