Slate Roofing Contractors Association of North America, Inc.

Contractor Profile:

Duration Construction

Duration Construction

Membership Category: Slate Roofing Contractor

Contractor Directory | SRCA Member Page | Map | Disclaimer


General Information

1. BUSINESS NAME: Duration Construction

2. CONTACT PERSON: Shawn Wittenberg

3. BUSINESS TYPE:  Corporation     

4. ADDRESS: 10805 Sunset Office Dr., Suite 300, St. Louis, MO 63127

5. PHONE NUMBER: (314) 238-1357

    Fax Number: (877) 211-6361

    Email Address:


6. STATE WHERE INCORPORATED:  FL                                                        Year of Incorporation: 2006

7. YEARS IN BUSINESS under current ownership:  9.5                               Years in business under present name:  2  


8. FULL TIME EMPLOYEES (Average No.): 3




10. WORK RANGE:  150 Mile radius of St. louis, MO; 50 Mile radius of Kansas City, KS


11.List any TRADE ORGANIZATIONS to Which You Now Belong: National Slate Association, SRCA


12. CRIMINAL HISTORY: Has the above named business, including principals, partners, officers, owner, or any employee, been convicted of any business related crimes in the past 15 years?   No 

13. LICENSE REVOCATION: Have you ever had a business license revoked?  No


14. LIABILITY INSURANCE Company: South Florida Casualty – Seneca Specialty Ins.

15.  WORKERS COMP. INSURANCE: Insurance Source Inc.

Experience Level


16. I have been actively involved in the slate roof contracting business for the past five continuous years.  Yes

17. I, or my employees, have worked on, repaired, installed and/or restored slate roofs for at least the past five continuous years:   Yes       

18. At least 75% of the number of annual roofing contracts I fulfill each year are slate roofing contracts:  Yes    

19. If your annual percentage of slate roofing contracts is less than 75% of your total roofing, what percentage of your roofing contracts do you estimate to be slate roofing contracts?

20. What estimated percentages of contracts in the following roofing categories do you engage in annually?

21. asphalt shingles        1%

single ply                     3%              

built-up roofing             1%

cedar shakes              %

22. ceramic tile            5%

cement shingles            %

imitation                     10%

metal                        %

23. Other (explain):

24. What percentage of your business contracting does not including roofing at all? 5%

25. What other types of contracting services do you provide other than roofing (e.g. carpentry, siding, heating)? Copper & metal fabrication, gutters & siding

26. Do you subcontract slate roofing work to other contractors?  No

27. How are your roofing professionals trained? On the job training, conferences, continuing education & workshops

28. Do you do FLAT-LOCK (SOLDERED) COPPER roofing?   Yes     

29. Do you do STANDING SEAM metal roofing?  Yes       

30. Do you repair ASBESTOS SHINGLE roofs?      

31. Do you install RAIN SPOUTING on slate roofs?   Yes

32. Do you do MASONRY WORK in association with slate roofs (such as chimney rebuilding)?      No     

33. Do you do ARCHITECTURAL SHEET METAL work (such as ornamental copper)?   Yes      

34. Do you do STEEPLE WORK?   Yes       

35. How do you access steep slate roof areas when doing repairs?  Chicken ladders, ladder hooks, slater’s roof brackets w/2”x12” boards, ropes/harnesses etc.

36. What is your preferred method(s) for installing a replacement slate when doing a repair in the field of the roof? Single nail with copper bib flashing

37. Do you sell salvaged roofing slates?   No                                  If yes, do you ship them?  

38. Do you keep a stockpile of salvaged slates?     No                          If yes, approx. how many squares?

39. Do you sell new roofing slate?   No                                             If yes, do you stock them?  

40. Do you do slate roof installations as well as repairs? Yes         

41. What is the maximum size, in squares, of a new slate roof installation your company will do? 500 sq

42. Do your roofing professionals have certified professional training? If yes, explain (include the names of the individuals):

43. Name(s) of your slating professionals

Years of Experience


Name(s) of your slating professionals

Years of Experience


Shawn Wittenberg


Will Avila


Rolando Martinez




Effrain Enriquez




Alex Martinez




44. SRCA MEMBER SINCE:  March 7, 2015