Fiber Cement Shingle Damage

Our engineers can determine if damage to fiber cement shingles is the result of a product defect, storm event or other cause.


Knott Laboratory’s structural engineers are experts in inspecting fiber cement shingles, also known as masonite, Woodruf, Cemwood and Permatec, for hail and wind damage. Our forensic engineers have performed destructive testing on Woodruf shingles gaining valuable data regarding the wind forces required to damage these shingles. Utilizing calculations, experience, research and testing data, our engineers can determine if damage to fiber cement shingles is the result of a product defect, storm event or other cause.

Through Knott Lab Academy, our engineers offer a free 1 hour course (approved for Wyoming Insurance Adjuster Continuing Education Credit) on inspecting fiber cement shingles. This course is popular with the SIU groups and can be taught at either your facility or ours.

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

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.

Experts in the Field

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

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

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

Senior Engineer

(303) 925-1900
tphelan@knottlab.com

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

Forensic Engineer

(832) 493-4817
apatrick@knottlab.com

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