About LJ Contractors

Since its founding in 2005, LJ Contractors has been satisfying the roofing and exterior demands of its customers while exceeding their expectations each time.

Get A Free Quote

"...we take the time to do high-quality work that leaves a lasting impression."

Mr. Werderitz

LJ Contractors provides a wide range of roofing services for residential clients throughout Southeast Wisconsin. In addition to installing and repairing all types of roofing systems, the company has the in-house capabilities to repair and replace siding, install new gutters and clean existing gutters, remove snow and ice buildup from rooftops, and more.

Owner Jim Werderitz credits much of LJ Contractors' success to its honest, customer-oriented approach to the roofing process. "We're straightforward when it comes to telling our clients what they need," he affirms. "When a roof is done properly, it's one of the things that stands out the most on a house, so we take the time to do high-quality work that leaves a lasting impression."

LJ Contractors educates its customers about best practices for roof maintenance so they know how to protect their investments. "Thirty years ago, you could just throw on some shingles and walk away, but today's roofs have underlayments and venting that can lead to problems like black mold, so it's important for homeowners to know about these things," says Mr. Werderitz. "We truly care about our clients and their homes, so we utilize our skills and knowledge base to give them the information they need."

Mid-class home with new roof

Company Philosophy

Customer satisfaction is our number one goal, so we always treat our clients fairly and make sure we're providing them with the best products, technologies, and installation methods. We strive to exceed their needs and expectations by ensuring their roofing projects are built to last.

LJ Contractors Is A Diamond Certified Company But why is that a big deal?

Since 2001, the American Ratings Corporation has operated the Diamond Certified Resource. Its primary goal is to spotlight companies that have proven themselves on several metrics including Highest in Quality and Helpful Expertise, and hold them accountable for their performance.

Because these ratings are pulled randomly from the customer base of LJ Contractors, you can be sure they are real, reliable, and accurate.


  • 16 Verified Customers Surveyed

    Number of real customers that were surveyed, and 14 of them gave LJ Contractors a perfect score!

  • 100% Customer Loyalty

    Percentage of customers who would hire LJ Contractors again in the future.

  • 94% Helpful Expertise

    Percentage of customers who received Helpful Expertise from LJ Contractors.

We're Ready To Serve You Today!

Customer satisfaction is our priority, and LJ Contractors is excited to help you handle any emergencies or home improvement to-dos. Contact us today to get started with a free, no-obligation quote!

Get A Free Quote
Close [x]