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  • Contact Us
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Why Aluminum Entry Doors?

2/26/2016

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Groke uses aluminum to build their modern entry doors.
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​Why Aluminum? Because it is so much more than just cans and foil.

Today aluminum is one of the most popular materials in use. Aluminum’s unique properties are the key to its versatility. 
  • ​Weight: Aluminum is 1/3 lighter than steel. 
  • Strength: The fact that it is lighter than steel does not affect its strength. Most all aluminum used today is an aluminum alloy, meaning it is a mixture of different materials.  This allows manufacturers the ability to create materials with a wide range of tensile strengths.  Unlike most grades of steel, aluminum does not become brittle at low temperatures. This is one of the reasons why aluminum is used in construction in the aerospace industry.
  • Formability: Because aluminum is softer than steel it can be formed and shaped many different ways.  Its superior malleability, either hot or cold, makes it a perfect material for extrusion.  Rolling, bending, forming, and cutting with less wear on the machinery make aluminum an ideal material for designing. This basic ability to form the material to adjust to the design in lieu of the design adjusting to the material be used have more and more industries moving toward aluminum as we see in the auto industry.
  • Corrosion Resistance: Aluminum reacts with the oxygen in the air to form an extremely thin layer of oxide.  This layer is thin but very dense and provides excellent corrosion protection.  This oxide layer is also self-repairing if damaged.  Aluminum does not rust like steel or iron. This oxidation is corrosion but it only formed to self-protect, a natural effect.
  • Recyclable and Sustainability: Aluminum is a material that is easily recycled. Manufacturing from recycled aluminum uses approximately 5% of the energy required to create aluminum from bauxite, the raw form of aluminum. And this material can be recycled over and over again. Nearly 75% of all aluminum ever produced is still in use today.
These unique properties of aluminum help make it the material of choice for industries such as transportation, aerospace, and building materials. And this list will continue to grow.  
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Aluminum Entry Door
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Aluminum Entry Door
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Aluminum Entry Door
Aluminum is the most common metal found in the earth’s crust (approximately 8%) and is the third most plentiful element known to mankind. Only oxygen and silicon (sand) exist in greater quantities. It wasn’t until 1808 that British electrochemist Sir Humphrey Davy established the existence of aluminum and not until Danish scientist Hans Christian Oersted produced the first tiny pellet of the metal 17 years later. It took many years of experimentation before a process was developed for aluminum production. The first production companies were not established until 1888 (one each in the US, France, and Switzerland). Through the early 1900s with this new process the price of aluminum continued to reduce as the demand continued to rise.
​By the end of World War II the stage was set for aluminum to become the most widely used non-ferrous metal in the world.
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Passive House Entry Door

2/11/2016

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Groke entry doors U-Factor range from .257 all the way down to an impressive .13, making them ideal for use as a Passive House Door. 

All Groke door configurations meet European air leakage Class 4, with the exception of double in-swing doors which meet Class 3 criteria, still within the Passive House performance requirements.  

While Groke custom doors are very suitable for Passive House doors, they are equally at home in other applications from new construction to retrofit... and of course deep energy retrofits.  Whether the building is old or new, modern in style or traditional, everyone appreciates a finely crafted door that offers superior thermal performance, serious security protection, and long term durability all in one beautiful package! 
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Doors are often the “weak link” in modern, high performance buildings, but they don’t have to be. Our standard multi-point locking, combined with multiple levels of uninterrupted gaskets offers a very tight seal that keeps your valuable and comfortable conditioned air inside, where it belongs.  

Whether your goal is Passive House certification, Net Zero, LEED Platinum or another green building standard, we applaud your efforts we’re excited to help you achieve your goals.  

If you’re just looking for a really great door that offers more comfort, style, energy savings, and peace of mind… we’ve got you covered too! 

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