Thelen completed FOUR projects on my building totalling over $30,000. All bills were paid…read morepromptly. TWO of the projects were less than satisfactory. The mini split installation required almost $550 (out of my pocket) to local service contractors for modifactions over the next year to correct problems directly related to the Thelen installation. A zone heating modification never worked properly after a $2500 (paid) installation, Two Techs spent four hours reviewing the problem and stated that the system design was was incorrect. The system design was done by Thelen! I told this to the technitians. For this assesment I was billed $624! I refused to pay for this "trouble call" and told them so. The office/account manager then sent this bill to a collection agency. I documented all of the problems and expenses and provided it to the management who refused to discuss the issues until I paid the collection agency. Now I am dealing with a collection agency for a $624 bill after spending $30k here.

I had them replace the condenser for my air conditioning 2 summers ago. Later that summer, it…read morestarted freezing up. I had them out 5 times over the next year to try to fix it. All they did was make more problems and fix those. I paid Over $500 And the original problem was not fixed.

They did a good job on siding and most of the roof, but when they broke a piece of the siding and a…read morepiece of siding formed bubbles on it from hanging loose for over a week, they did not come back to fix. I contacted them with my concerns and pictures of the damage, but a year later have still not come back to fix. Also, pointed out a part of shingling that raised up, but they have not replied to that either. After a year, I'm also still picking up nails, screws and bits of siding.

They did a very good job on my siding. I would give them 5 stars except they are kind of bad…read moreresponding to emails about scheduling.

Robert and his crew of professional roofers are amazing. Perfection in their roofing techniques and…read morework site cleanup was immaculate. All of the above and good natured personalities too boot!

From the owner: Revival Roofing provides Asphalt Shingling, Roofing Repairs, Snow & Ice Removal, and Roofing…read moreContractor to the central MN area.

Do yourself a favor and stay as far away from this contractor. Super slow, terrible workmanship…read more Had windows and siding installed. Job that should have took a couple of weeks took almost 3 months. Had cracked window installed, was told not to worry by the so-called project manager because he already ordered it. 2 months later was told it was on a truck. Following month was told it was in production. Finally got the window 3 months after start date. Ended up installing window extentions myself because I came home to find gorilla glue (my glue they helped themselves to) oozing out of the window casing joints. Definitely not finish carpenters. Left all the debris piled up in the yard during the entire project. The caulking looks like terrible. Cons !

From the owner: Green Source Inc. is a full-service, licensed, and insured construction company established in…read more2012. We rely on 40 years of combined experience to do build new homes and update the overall energy efficiency of your residence by replacing windows, doors, siding, and roofing. Because we are family owned and operated, we can provide personalized services for any homeowner.