- January 13 & 14, 2026
- March 10 & 11, 2026
- May 12 & 13, 2026
- July 14 & 15, 2026
- September 15 & 16, 2026
- November 10 & 11, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. PLEASE NOTE: There is no smoking on the Cape Cod Lumber property which includes inside vehicles. Upcoming Class Dates: -
Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. NOTE: This new Andover location is replacing the Peabody and Woburn locations. Upcoming Class Dates:- January 6 & 7, 2026
- March 3 & 4, 2026
- May 5 & 6, 2026
- July 7 & 8, 2026
- September 9 & 10, 2026
- November 3 & 4, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:-
February 24 & 25, 2026
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April 28 & 29, 2026
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June 23 & 24, 2026
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August 25 & 26, 2026
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October 27 & 28, 2026
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December 21 & 22, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:- December 9 & 10, 2025
- February 18 & 19, 2026
- April 21 & 22, 2026
- June 16 & 17, 2026
- August 18 & 19, 2026
- October 20 & 21, 2026
- December 15 & 16, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar above to register for both days. NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Upcoming Class Dates:- October 1 & 2, 2024
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:- January 27 & 28, 2026
- March 24 & 25, 2026
- May 19 & 20, 2026
- July 28 & 29, 2026
- September 29 & 30, 2026
- November 17 & 18, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates: -
Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:- February 11 & 12, 2026
- April 14 & 15, 2026
- June 9 & 10, 2026
- August 11 & 12, 2026
- October 13 & 14, 2026
- December 8 & 9, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates: -
Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:- February 4 & 5, 2026
- April 7 & 8, 2026
- August 4 & 5, 2026
- October 6 & 7, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:- December 16 & 17, 2025
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates: -
Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:- January 20 & 21, 2026 - CONFIRMED CLASS
- March 17 & 18, 2026
- May 27 & 28, 2026
- July 21 & 22, 2026
- September 22 & 23, 2026
- November 23 & 24, 2026
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Our 12 Hour CSL Renewal classes are only taught by experienced contractors and include lunch, snacks and coffee. Click an available green date in the calendar below to reserve your class. This is a 2-day course as shown below. Please click on a starting date in the calendar below to register for both days. Learn about the new energy codes "Net Zero" construction requirements in this class NOTE: Classes run from 8:00 a.m. to 3:00 p.m. Click here to view the topics covered for this course. Upcoming Class Dates:- February 26 & 27, 2025 - CLASS FULL
