High Performance Buildings: DELTA®-TRELA

Building or installing a metal roof or metal cladding? Dörken’s Technical Service Manager Krzysztof Apriasz shows how DELTA®-TRELA can provide effective protection against moisture and corrosion, ensuring any metal roof or cladding lasts longer.

For commercial builders and owners, there are a variety of benefits to metal roofs in building design. A properly installed metal roof is extremely durable and can last as long as 40-70 years (exceptionally longer than traditional shingles). They’re also known to withstand strong winds and, thanks to their reflectiveness, can be very energy efficient and reduce heating and cooling costs.

However, if the metal roof isn’t fastened properly to the deck or sheathing, moisture can enter, which can lead to rust and damage.

To combat this, DELTA®-TRELA is a vapor permeable underlayment that features 2 layers of polypropylene and is specifically designed for metal roofs and facades. This waterproof, breathable membrane protects against moisture and corrosion, provides effective ventilation and drainage, and reduces rainfall noise by up to 15 dB.

Dörken’s Technical Service Manager Krzysztof Apriasz shares all of the unique features of DELTA®-TRELA and how it works, providing an air gap between the roof underlayment and the finished metal roof to ensure constant air flow. He also talks about some handy DELTA® components like DELTA®-MULTI-BAND tape and DELTA®-THAN sealant that can be used to ensure a tight seal and proper installation of the product.


About Krzysztof Apriasz

Krzysztof Apriasz

Krzysztof is Dörken’s Technical Service Manager, responsible for ensuring proper installation and use of all DELTA® products. He also works to maintain and uphold all building code approvals as well as provide product solutions for the whole building envelope, helping to build and maintain healthy structures and homes that are free from mold, moisture, and rot. Krzysztof is also a Certified Passive House Consultant, providing extensive expertise to customers in building for energy efficiency.

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