Pro Diamond Bar Roofing Contractor

We’re Diamond Bar’s leading roofing contractor, in business for over 35 years.  No matter what type of roof you need — whether you need new roof installation or re-roofing, residential or commercial — we have all the expertise and experience necessary for outstanding results.  Today’s materials offer attractive extra-durable and longer-lasting results in a wide range of colors and styles.  You’ll increase the resale value of your property, and many even reduce cooling costs.  Some types may even qualify you for reduced insurance premiums.

There’s no need to rely on just photographs or sales brochures.  Visit our showroom and see each option for yourself.  Then you can count on us for truly professional installation.  A full-service California licensed roofing contractor, we’ll include all accessory components, handle Diamond Bar building permits, and keep your property clean and neat.

Quality Materials and Workmanship

We maintain our reputation as the leading roofing company in the Diamond Bar area with highly-skilled workmanship and top-quality roofing materials.  No matter what type of roof you need, we’ll make it happen with roofing materials that have been extensively tested and carry manufacturer’s warranties meeting fire, hail, and earthquake industry standards.

  • Composition Shingles Today’s composition shingles have gone well beyond asphalt compounds for lifespans in the decades, with warranties to match.  Along with an even wider selection of colors, textures, shapes, and other features. 
  • Clay Tile Roofing provides traditional beauty and durability and is an environmentally friendly choice. 
  • Concrete Tiles are even more rugged with wide-ranging options in color, shape, and patterning that mimic natural products or set their own modern style. 
  • Wood shingles and wood shakes have been a Diamond Bar and California favorite, and when retardant-treated are allowed in some areas. 

We even install slate roofs.

Our offerings include product lines from GAF, the #1 selling brand, along with innovative products from CertainTeed, Owens Corning, Tamko, and others.  Clay tile from Boral or Redland are also popular among Diamond Bar residents, as are concrete tile from Boral and Auburn.

New Roofs

Our pro commercial and residential roofers make sure that everything’s done right, right from the start.  And on through final cleanup.  For new roof installations, we’ll be happy to consult with you regarding your best options in materials and design.


Re-roofing is a good idea when your existing roof exceeds its warranty.  And it’s a great idea when inspection results reveal deficiencies, as well as after major storm damage.  The longer lifespan of today’s materials is yet another reason to lean towards replacement rather than ongoing repairs.  Imagine, no more worries about roof leaks.

We provide complete re-roofing services.  Our structural engineering experts can determine if it’s necessary to tear off existing materials as well as whether concrete or clay tile is a viable new option.  We’ll inspect for dry rot and other bad decking and framing problems, replacing wood as necessary.

Commercial Buildings

Working with Diamond Bar building owners, facility managers, and property managers we provide hot-mop cap sheet and hot-mop rock new roofing for major facilities.  Our expertise also includes advanced coatings and roof restoration materials such as those from R&D leader APOC.  And of course, residential roofing materials are great options for smaller commercial buildings.

Why Choose Musulman Roofing?

Locally owned and operated, we built our reputation and work to maintain it with high standards of workmanship and business behavior.  Just check our reviews and our BBB top rating of A+.  And BuildZoom ranks us in the top 1% of all California licensed contractors.  Fully licensed, insured and bonded our team receives ongoing education to earn our certifications as a Master Elite GAF Roofing, CertainTeed Select Shingle Master, and Owens Corning Preferred Contractor.

Diamond Bar

Named after the diamond-over-bar branding iron registered by Frederick Lewis in 1918, the city has a stable population of just under 57,000 residents.  Its families are served by the blue-ribbon school districts Pomona Unified and Walnut Valley Unified.

View Our Showroom

We invite you to stop by our showroom, we have many different roofing products on display. Musulman Roofing is licensed, bonded and fully insured.