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Diamond Kote

Complete Siding Systems

Quality Matters

We understand beauty and function matters. Our siding system is designed to hide nail heads to create a flawless finished home.

Enhanced Durability

Upgrade your home with painted siding that resists harsh weather and impact including hail. Backed by a 5/50 Year Siding System Warranty.

Long-Term Performance

Gain back your free time with low maintenance siding that will not peel, chalk or fade, all backed by our 30-Year No Fade Warranty.


Features and Benefits

  • New colors - six in-demand colors have recently been added.
  • Rigidstack™ Siding & Trim compliments a wide range of home styles without compromising durability.
  • Pre-finish can save you tens of thousands in repainting costs
  • Built on LP® SmartSide®, an engineered wood product treated with a SmartGuard® process, allowing it to withstand extreme temperatures.
  • RigidStack™ siding is 375% stronger than standard lap siding, creating extreme strength for wind resistance, hail strikes, and other impact.

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Create The Foundation

What type of lumber should you use for your deck? Whether you’re building a deck or something much larger from an infrastructure standpoint, Allegheny Millwork & Lumber has building products you need.

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Patio Doors

The Perfect Outside Look

If you have a patio or outdoor area in your home, the entryway is just as important is the front door. Patio doors demand unobstructed views and lots of light. Come talk to us!

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Outdoor Aesthetics

Using quality, customized siding gives your exterior character. Choose from a variety of style choices to give your home the curb-appeal they can’t turn away from.

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About Us

Why Builders Recommend Allegheny Millwork & Lumber

Our reputation for quality and excellence is why you should choose Allegheny Millwork & Lumber.  Our staff is highly knowledgeable and friendly.  We will help guide you through the myriad products when you are building or renovating your home.

From building materials to fine finishes, we have you covered.  Beautiful doors create a welcoming entrance to your home.  Crystalline windows and gargantuan patio doors can grace your property, framing the view and keeping you protected from the elements.  Our experts can help you make the decisions when choosing what is right for you.  No project is too big or too small.  Come see why the best contractors in Pittsburgh have been using Allegheny Millwork & Lumber for the last 40 years.

With over 350 moulding profiles in stock, we can adorn your windows and doors, ceilings, walls, and floors with quality woodwork to put your own stamp on the project at hand.  We can also match existing millwork to complete your historical renovation.

Additionally, we will help you design the kitchen of your dreams.  We encourage you to make an appointment in our 10,000 square feet design showroom.  You can also visit our virtual showroom by clicking on the link to the right  We hope to see you soon!