Ronald Wieferich

Mechanical Contractor · Mason, Michigan

License number	7100212
Trade	Mechanical Contractor
Location	933 W Dansville Rd, Mason, MI 48854
Licensed since	1985
License expires	08/31/2028
Status	Current, Active (as of 2026-08-25)

Verify license 7100212 on the official Michigan portal

What this record tells you

Ronald Wieferich holds Michigan license 7100212, authorizing work as a mechanical contractor — 41 years of continuous licensure. It is one of 4 active mechanical contractor licenses in Mason, so you have local alternatives to compare quotes against. Confirm the current status on the official state portal before signing a contract.

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