It depends on the percentages of air & water that are involved.
Fresh snow typically includes 80-95% trapped air. Cold & dry snow tends to have more air than warmer & wetter snow. The corresponding SWE is lightest for new dry snow.
Snow absorbs water as it fills the air spaces and the SWE increases rapidly as the snow begins to compact from wind and the addition of absorbed water.
Because roof snow loading can change so dramatically - Facility managers & property owners need to regularly monitor the roof during the winter.
SRS automatic monitoring systems provide real-time visibility.
Avoid repeat trips on the roof during the winter. Save time, reduce risk, and save money every winter with Safe Roof Systems.
How much does snow weigh?
Cut shoveling costs in half - or more!
Installing a DMD1000 roof load alarm saves you money everytime it snows.
Reduce your shoveling costs by 60% and more.
Deflection Monitoring is a REFERENCE STANDARD in measuring roof loads. Our systems work automatically 24/7/365 to alert facility managers to the joist deflection caused by accumulating roof loads and help direct snow removal actions.
The Deflection Monitoring advantage
Deflection monitoring considered the reference standard by experts for observing roof loads
Considered more accurate than inferential sampling techniques.
DMD1000 sensors are mounted under the roof deck
DMD1000 roof sensors are connected directly to the control panel
The DMD1000 sends alarm email notifications directly from the control panel