Fiberglass Storm Shelters
Storm shelters made out of this type of product have some advantages: they are cheaper, and weight less; they are easier to transport, and they can last over 500 years. There is no human being that will live that long. However, they do have several drawbacks. They break with time, provoking water leaks, and mold. In addition, in the presence of fluctuating ground temperatures, and shifting earth conditions, spider cracks tend to develop. Over time, a fiberglass unit will present premature failure. Similarly, there have been reports of several cases where fiberglass shelters float out of the ground due to the water pressure.
What Happens If a Storm Shelter Is Not Properly Anchored?
At Torshel, we only use steel reinforced units with strong steel frames. If the unit will be buried, it is protected with an epoxy resin, accompanied by a corrosion inhibitor such as a “sacrificial” anode.
All our in-ground shelters are well anchored to the slab with iron rods, and if the unit will be placed outdoors, 5-cubic yards of concrete is poured around its perimeter to keep it from “floating” out of the ground in the vent of saturated soil conditions.
There are several companies that do not anchor storm shelters in a proper manner. The following pictures show the results of inappropriate anchoring procedures.