Join us at 7:30 PM Eastern Time on the First Wednesday of Each Month:

Join us online any Monday Evening at 7:00 for the Seminar Committee  Orientation:

Event :: 2023 MAC ASHI Spring Technical Seminar


2023 MAC ASHI Spring Technical Seminar


- Mike Twitty :: A Guide to Good Electrical Inspections
- Mark Parlee :: Building Envelope Failures and
   How to Recognize Them


MAC-ASHI Spring Technical Seminar

Saturday April 29, 2023

Rockville Senior Center
1150 Carnation Drive
Rockville, Maryland


Mike Twitty :: A Guide to Good Electrical Inspections

Mark Parlee :: Building Envelope Failures and How to Recognize Them


8:00 AM   -  8:30 AM   Breakfast  
8:30 AM   -  8:40 AM   Into to ASHI
8:40 AM   -  10:10 AM   Electrical
10:10 AM   -  10:25 AM   Crack Man
10:35 AM   -  12:15 AM   Electrical
12:15 PM   - 12:20 PM   Inspector Pro
12:20 PM   -  1:10 PM   Lunch
1:10 PM   - 1:15 PM   Pre-listing
1:15 PM   -  2:55 PM   Envelope Failures
2:55 PM   -  3:10 PM   Monroe
3:10 PM   -  4:50 PM   Envelope Failures
4:50 PM   -  5:00 PM   Sign Out

Eastern Time Zone

Registration Fees

MAC ASHI Members:   $175.00
Guests:   $199.00  
Students:    $75.00

Register Early :: Seating is Limited
Approved for Eight (8) Maryland CPCs 
Approved for Eight (8) ASHI® Continuing Education Credits
Many states do not preapprove CEs, rather they accept ASHI® CEs. It is our understanding that VA, PA, WV, and DE accept ASHI® CEs, but we do not speak for them.
Therefore, y
ou are responsible for verifying that your state accepts ASHI® CEs

Mike Twitty :: A Guide to Good Electrical Inspections 

Mike Twitty has recently retired from a 17-year home inspection and compliance inspection career. He is a licensed electrician, and is certified by the ICC and IAEI as a residential building inspector and residential electrical inspector. Prior to becoming a home inspector, he retired from a 30-year career with Ford Motor Company where he worked as an industrial electrician. Mike currently provides continuing education training for home inspectors across the country on electrical subjects and has authored many technical articles for national publications.

Mike Twitty is IAEI Certified  Mike Twitty is ICC certified

A Guide To Good Electrical Inspections

This course will cover all of the components that make up a residential electrical system. Modern electrical systems can sometimes seem complicated and be overwhelming to a home inspector. Learning how to dissect the system into sections and follow a planned procedure will improve the inspector’s efficiency and ability to provide a comprehensive and quality inspection. We will take a step-by-step approach on how to properly inspect everything from the utility transformer down to the outlets and switches. The presentation will include numerous photo slides to illustrate different systems, panelboards, devices, and concerns. Safety measures and standards of practice will be discussed throughout the presentation. Developments of lighting technology have changed vastly over the past few years. We will cover these changes and the effect they have on electrical load demands. Testing equipment and procedures will also be discussed. No inspection is beneficial unless the findings can be effectively communicated to the client and repair technicians. How to properly report defects and describe the system will be included in this class. This is a 4 hour class and open discussion and questions are encouraged.

Course Agenda and outline:

  • Introduction and course objectives 
  • Discussion of how to develop a routine for your inspection procedure
  • Examples of how to break down the system into sections to reduce mistakes and omissions
  • In-depth look and explanation of: 
    • Services and associated equipment
    • Grounding and bonding
    • Sub panels and remote disconnects
    • Receptacles and outlets
    • Lighting systems
    • AFCI and GFCI protection
    • Conductors and ampacities
  • Safety procedures
  • Testing equipment and procedures
  • A short discussion of codes and standards of practice
  • Panel inspection methods: 
    • What to look for before removing the panel cover
    • Micro and macro views
  • Good reporting procedures
  • Summary and Q & A
This segment will include some additional slide photos of common failures and concerns.

 Mark Parlee :: Building Envelope Failures and How to Recognize Them

Mark Parlee is a Building Consultant with 46 years in the construction trades, having worked as a framing and siding carpenter, homebuilder, remodeler, and exterior renovator.  While working in these trades he has built, or dismantled and replaced, the exteriors on several hundred homes. This has allowed him to see what works, and to also see the problematic details that have led to moisture intrusion into the building envelope and to effect corrections.

Mark currently uses the expertise gathered over his life’s work as a consultant on construction defects and moisture intrusion as an expert witness, and as a seminar presenter for inspection organizations for Continuing Education credits, and for builders looking to better their quality. He is EDI (Exterior Design Institute) Certified as an EIFS, Stucco and Stone Inspector/Moisture Analyst/Quality Control and is also certified by EDI as a Building Envelope II, Steep Slope Roof Inspector and was one of the instructors of the first EDI Stone Veneer Inspection Certification Seminar. As a member of the Board of Directors for EDI, Mark is involved in updating curriculum and writing new curriculum to keep courses in step with the most current technologies.

He is a certified Level I Infrared Thermographer and Certified Residential Thermographer.  Mark has been a guest lecturer for Architecture Forensics at Iowa State University. Mark has also attained certification as a Building Envelope Investigator through BESI (Building Envelope Science Institute).

Mark has had many articles in Journal of Light Construction, including “Rescuing a Manufactured Stone Wall,” “Repairing a Rotting Roof,” “A Rot Resistant Chimney Chase,” “Mixing Cladding and Stick-On Stone,” “Best Practices: Adhered Masonry Veneer,” “Best Practices Stucco,” “Common Siding Failures,” “Getting Kick-Out Flashings Right,” “Common Roofing Errors,” and “How to Destroy a Wall in Two Easy Steps.”

Mark has culled his archives of thousands of photos of exteriors in need of repair and addressed the needed proper correction in power point driven presentations for Continuing Education credits to the National Association of Home Builders Remodelers Council, the American Institute of Architects Iowa Convention, Minnesota Society of Home Inspectors, MidAtlantic Chapter-ASHI (NJ), St. Louis ASHI (MO), Indiana ASHI, Garden State ASHI (NJ), Keystone ASHI (PA), NoVA ASHI (VA), Professional Home Inspectors of Missouri, Oklahoma Residential & Commercial Inspection Association, HouseMaster (CO), JLC Live Northwest (OR), American Society of Home Inspectors National Convention (Inspection World 2015 through 2020), and Alliant Energy Builder Training (2015-2017), Local and regional chapters of ASHI.

Start Date And Time

04/29/2023 08:00 am

End Date And Time

04/29/2023 04:30 pm


1150 Carnation Dr. Rockville MD



Stockton Barney :: InspectorPro Insurance


John Kwasnik  ::  Horizon Report-writing software

Steve Oliver :: Monroe Infrared

Home Inspector Training Academy

Hollis Brown :: Home Inspector Training Academy

Alek Vujik :: The Crack Man - Foundation Crack Repairs