Mark Langer, Owner · Established 1956
Accreditation Status
Cycle 2026
Status
Not Accredited
Review not yet completed
ARCO Accreditation is reserved for roofing businesses that complete a comprehensive review and meet ARCO's required qualification threshold. Not every business reviewed qualifies.
Issued only after successful review
Accreditation No.
Not Issued
Accreditation Status
Not Accredited
Accreditation Review
Not Completed
Qualification Status
Not Determined
About ARCO Accreditation
Accreditation cannot be obtained through application alone. Each business must first undergo ARCO's complete review process and demonstrate that it meets the standards required for accreditation.
Provide your contact information below. ARCO will review your inquiry and determine whether your business may be invited to complete the accreditation review process.
Public Record
Findings drawn from public records, manufacturer registries, and third-party review platforms — synthesized using ARCO Standard 2026.1.
Public Signals Reviewed
14
across 4 categories
Customer Review Rating
4.2/5.0
across 35 verified reviews
Years in Business
70+yrs
Founded 1956
Accreditation Review
Not Yet Completed
Qualification has not been determined
Accreditation Committee Review
No committee determination has been issued.
Not Yet ConductedThe source findings below have been independently verified for this company profile. A formal ARCO Accreditation Committee review has not yet been completed, and qualification for accreditation has not been determined.
Only businesses that complete the full review and meet ARCO's required threshold may receive accreditation.
Signal
SAM.gov federal exclusions
Result
No exclusions found
Checked August 2026
SAM.gov
Signal
Manufacturer certifications
Result
GAF Certified GAF GoldElite · CertainTeed ShingleMaster
Manufacturer programs
Signal
Years in operation
Result
70+ years continuous
Founded: 1956
Verified record
Signal
Owner/principal
Result
Mark Langer
Manual collection
Signal
Website registration
Result
Registered: Sep 23, 1997
WHOIS/RDAP
Signal
Google Business Profile
Result
Langer Roofing & Sheet Metal Inc.
Milwaukee, WI
Signal
Aggregated marketplace rating
Result
4.2 / 5.0 across 35 reviews
Google 4.2 (35)
Multi-source
Signal
Review volume
Result
35 stored public reviews
Multi-source
Signal
Customer review excerpts
Result
6 qualifying reviews on file
Multi-source reviews
Signal
BBB rating
Result
A+ / BBB Accredited
BBB Accredited since: Apr 1, 1956
BBB profile
Signal
OSHA findings
Result
6 violations across 3 inspections
Last inspection: Nov 1, 2024
OSHA
Signal
BBB complaint history
Result
No complaints filed in the last 36 months
Years in business: 70 - Business started: Feb 8, 1956
BBB profile
Public records and third-party platform data may change over time. ARCO does not guarantee ongoing third-party accuracy.
WI-260610-1415
·
Evaluated Jun 10, 2026
·
Independently verifiable at
RoofingContractors.org/verify/WI-260610-1415
Eligibility Checks
ARCO automatically withholds accreditation when any of the following findings are present. Langer Roofing & Sheet Metal's record was checked against each.
Active SAM.gov federal exclusion
OSHA willful violation or 3+ repeat violations on record
BBB rating of C, D, or F
Avg. customer rating < 4.0 (with ≥ 20 reviews)
Langer Roofing & Sheet Metal Inc. is a Milwaukee-based company owned by Mark Langer that provides a comprehensive range of residential and commercial roofing solutions. Their expertise includes professional sheet metal fabrication and specialized roof leak repair services.
Contact Langer Roofing & Sheet Metal to confirm availability for your project in Wisconsin.
ARCO Review Findings
Langer Roofing & Sheet Metal is highly regarded for its professional, knowledgeable team and high-quality workmanship. Clients consistently praise the company for their clear communication, fair pricing, and reliable project management, noting that crews are punctual and maintain clean job sites.
Hello I'm Leonard Lincoln of Odyne Hybrid systems. I called to see if Langer Roofing was interested in not having your trucks idle as we do Idle mitigation. I haven't heard back.
Langer has the equipment and experience to get the Job done. Three generations of Family Members are behind the Quality and know how of this well established Wisconsin Roofing Specialist. If you want it done right the first time call Langer they gotcha covered.
The Langer team replaced the flat roof system on our church. They were on time, professional, and friendly. They helped walk us through different issues with bad insulation and drainage problems up there. They took time to explain what needed to be done, gave us a fair price ,and hit their number! Mark and Doug were both amazing to work with. I highly recommend them for your project! Pastor Dave, Kenosha Bible Church
Langer were recommended to me by a friend in the property management world. There are a lot of roofing companies but none seem to have the reputation that these guys have. I own a small business and after hearing people in the industry talk so highly about Langer, it made the decision easier to go with them a simple one. The project looks great and Gary the account manager I communicated with was great to work with and a I feel very comfortable working with them on next year’s roofing project!
My contact at Langer roofing is Gary Montag. He is very polite, he returns my calls promptly and he is very knowledgeable about all types of roofing. He explains step by step easy to understand repairs needed to get our roofs back in excellent working order. The entire crew is very polite and they clean up after them selves daily. I hire them for all our roofing needs.
Review data aggregated from public sources · ARCO does not moderate third-party reviews
The difference between "good enough" and proven excellence. Only the top roofers in America earn ARCO Accreditation — recognition of true craftsmanship, ethics, and integrity.
Peace of Mind: Every ARCO-Accredited roofer has been checked against public licensing records, safety records, complaint history, and verified customer reviews.
Work You Can Trust: ARCO's evaluation includes manufacturer certification programs — credentials that can help preserve your roof's warranty coverage.
Verified, Not Self-Reported: ARCO's findings come from government and third-party sources — state filing offices, SAM.gov, OSHA, and the BBB — not from paperwork a contractor submits about itself.
A Public Paper Trail: Every accredited profile publishes its report number, evaluation date, and sources — so any homeowner can independently verify the findings at RoofingContractors.org.
Contact Langer Roofing & Sheet Metal
Call (414) 476-5800 or request a written estimate through www.langer-roofing.com.