Tactical Tuesday this week looks at attic fires. Did you know, over 60% of the fuel surface area in a residential attic is the underside of the sheathing material. Limiting the involvement of the sheathing was found to be the best way to knock down an attic fire while preventing further spread.
The construction of a residential attic makes applying water to the sheathing difficult. Rafters and trusses prevent hose stream penetration and deflect water away from the sheathing material. The most effective way of putting water on the sheathing was through the use of the natural ventilation path.
In residential attics fresh air enters low through the eaves and is exhausted out through some combination of ridge and/or gables vents. Applying water through the eaves wets over 60% of the surfaces in the attic providing suppression and preventing regrowth.
A video of the tactic being preformed on our test structure can be found here:
How can you see this tactic working for your department?