We Are YOUR Roofing Contractor

We have been dedicated to providing top notch residential roofing services for years, and can’t wait to help you with any concerns you might have about the roof over your head. Below you’ll see some of the benefits of working with a certified GAF Roofer, and you can also check out some of the other great services we offer.

Residential Roofing Services:

Greiman Construction is proud to offer a range of roof company services:

If you need information on the process for insurance claims or are interested in an on-site evalutation, please let us know. We can also work with you during a new build process to be able to provide an estimate on a completely new roof installation. We’ll also work with you in cases of adding a home addition or doing some exterior renovation. We are definitely versatile in this regard, and also pride ourselves on providing excellent customer service throughout the process of ensuring that your roof is safe, reliable, and long-lasting.

Since we are a GAF Master Elite Certified roof installation company, we’re able to provide their entire line of excellent products. When you work with us, you can absolutely rest assured that you’re in the hands of seasoned professionals dedicated to displaying quality workmanship with only the best materials available on the market. You won’t find any shortcuts with us, which definitely sets us apart from many other contractors in the area. Also, be sure to check out some of the numerous benefits of working with GAF materials below! 


Quick Points About GAF

  • Timberline Shingles with Advanced Protection Shingle Technology are the #1 selling shingle brand in North America
  • Rated #1 in shingle quality by home builders in 9 out of the last 11 years
    Winner of 2012, 2013, 2014, 2015, and 2016 Womens Choice Award, with 9 out of 10 female customers highly recommending GAF to others
  • Multiple winner of the Builders Choice Award
    Winner of the Innovation Award for Asphalt Roofing Shingles in both Home Builder Executive and Home Improvement Executive in 2011, 2012, 2013, and 2014
  • Manufacturing locations across North America to serve you better
  • CARE installation training program has provided education to nearly 200,000 industry professionals
  • Regularly sought out to appear in leading home and garden publications and on home improvement networks such as HGT

Be sure to check out their great selection here!



  • For over three generations, the Greiman family has provided northern Iowa with amazing home construction and commercial roofing.
  • Our team maintains a belief in the values that our company was founded with: reliability, quality craftsmanship, and durability of exceptional products.
  • Our team is built on friendly and reliable services. These are services that you can count on for all your roofing and siding needs.
  • Do your diligence. It’s your home, make sure you are protected with quality workmanship as well as top of the line products and warranties.


Customer Experience


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