top of page

Contact Ritchie's Insulation & General Contracting in St. Thomas

Quality Workmanship • Free Estimates • No High Pressure Sales

Whatever the project, just give us a call! Ritchie's Insulation & General Contracting has over 35 years of experience. Together, we can discuss the options available and figure out how best to insulate your building whether it’s for your home, shop, office, barn, commercial space, etc.

Service Area

  • Southwestern Ontario


Phone Number*



Thanks for submitting!

Measuring insulation


R.R. 2 - 43853 Southdale Line,

St Thomas, ON, N5P 3S6







Office Hours

Monday – Thursday: 7:30 AM - 5:00 PM

Friday: 7:30 AM – 12:00 PM

Saturday: Closed

Sunday: Closed


Note: Our operating hours are Monday – Friday starting at 7:30 AM and finishing at varying times dependent on job requirements.



Very Happy with the Work Done

“We are very happy with the work that your company provided. The two gentlemen that were at our home were very professional, very polite and did a wonderful clean job. We have already noticed a big difference in the cooling capability in our home.”


A Job Well Done

“Thank you very much for a job well done and for making our house a comfy, cozy home.”


Great Improvement

“After Ritchie's Insulation had added insulation to the basement walls, the attic and between the exterior walls, there was a 75% improvement in the home inspector readings. I have already noticed that even with the rising cost of electricity, the electric bills have already dropped at least $100.00 a month and the gas bill has dropped an average of $50.00 per month.”


Impressive Attention to Detail

“Thanks for doing such a great job on our house. We are impressed with your attitude and attention to detail.”


Considerate & Professional

“I wanted to write and say how much we appreciated your considerate manner and professionalism. I had a contractor tell me before you started that no matter what the insulation company tells me, they will always leave a mess. I presume I am at liberty to tell him that he was surely mistaken because your company went out of their way to be careful and if I may say thoughtful in how they treated our home. Thank you very much.”

bottom of page