Hail Damage Investigations

Knott Laboratory provides the quickest hail damage report turn-around in the business.


Hail damage investigations are common during the summer months. Hail can damage a roof causing moisture to penetrate the building envelope. Typically, hail stones less than 3/4” in diameter will not damage the roofing material. While inspecting a roof for hail damage, it should also be inspected for mechanical damage, improper installation, manufacturer defects and exposure to the elements. These other types of damage to a roof can appear to be hail damage with out proper knowledge and close inspection of the damage.

Problems can arise once hail has damaged a roof. For example, hail damage to cedar shakes will expose the underlayment (typically felt) to the elements and permit moisture to enter the structure. Once moisture has penetrated the structure, numerous problems can arise. Knott Laboratory and its engineers are trained to examine thoroughly hail damage and can provide a written investigation within a week.

Each hail damage investigation is unique and our engineers approach all cases with complete objectivity. Knott Laboratory provides the quickest hail damage report turn-around in the business. Contact Knott Laboratory so we can resolve your hail damage headache.

View Samples of our Work

Since 1982, Knott Laboratory has been providing comprehensive forensic engineering and computer animation services to reconstruct accidents.

High Profile Cases

Knott Laboratory has become the leader in forensic engineering and computer animation by investigating high profile cases and conveying our analysis effectively during litigation.

Experts in the Field

Our forensic engineers are experts in accident reconstruction, failure analysis and cause & origin. Our forensic engineers work directly with our in-house animation department to create state-of-the-art forensic animations for use in court, arbitration, mediation or settlement negotiations.

Stanley C. Stoll, M.Eng., P.E., CFEI, CVFI

Director of Structural Engineering

(970) 640-5928
sstoll@knottlab.com

Cade R. Caldwell, P.E.

Senior Engineer

(303) 925-1900
ccaldwell@knottlab.com

Kyle T. Wieghaus, Ph.D., P.E.

Senior Engineer, Northern Colorado Office

(970) 631-5290
kwieghaus@knottlab.com

Amy I. Patrick, M.S., P.E.

Forensic Engineer

(832) 493-4817
apatrick@knottlab.com

Tim R. Phelan, M.S., P.E., S.E, M.L.S.E.

Senior Engineer

(303) 925-1900
tphelan@knottlab.com

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