How to verify supplier, window quality and installer skills – case study

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Are you considering ordering windows from Europe but unsure if your builders are up to the task of installing them? Or perhaps you wish to inspect the windows yourself but find it impossible?

There is a solution! Before you commit to ordering windows from halfway across the globe, you can verify for yourself whether European windows truly live up to their reputation for high quality.

Explore a case study of a contractor from North Carolina who vetted the supplier, obtained a window for inspection, and tested the installation process before purchasing all the windows.

What did Francesco and his company gain?


He ordered a test window measuring 36 x 72 inches to evaluate its quality and also supplier’s reliability.


He had the opportunity to evaluate the installation skills of his builders before the entire order was manufactured and shipped.


Francesco opted for debesto’s delivery service, ensuring all windows were delivered directly to the job site.

Who is our customer?

Customer: Francesco
Project: single-family house
Location: North Carolina, United States of America
Experience in the field: ca 30 years
Experience in importing windows:

Problem to solve: inspect the window and asses the fitters’ skills before making a full order

Francesco stumbled upon debesto by chance during a visit to Krakow, Poland. He was highly impressed by the quality of Polish windows and considered incorporating this standard into his projects. Some of his friends had mentioned debesto, prompting him to reach out to us via

Having visited Poland, Francesco already had an impression of Polish doors and windows. However, he expressed significant concerns about the logistics of delivery and installation. The prospect of importing the windows seemed daunting to him.

Moreover, the installation process presented its own set of challenges. His fitters had no prior experience with Polish windows and had never encountered them before. Francesco was faced with the dilemma of how to ensure they could successfully install the windows.

Was it wise to order 40 windows and 4 patio doors on a whim, risking potential disaster at the construction site?

The solution: test window for $299

Francesco’s concerns about shipping windows to the U.S. were swiftly addressed when we opted for the delivery-to-site option available at debesto. We arranged transportation directly to the job site, so all he had to do was unload his order.

As we delved deeper into the purchasing process and assessed the installation options, we concluded that the best way to inspect the window at the job site and test the fitters’ skills was to place a trial order.

This approach minimized the risk of financial loss.

To check the offer of sample windows, please visit debesto sample shop.

We ordered a test uPVC window (Aluplast Ideal 4000) for Francesco, sized 36 x 72 inches and equipped with a window screen. Fortunately, I was able to arrange for the window to be included in a shipment already headed to the U.S. Thus, Francesco paid only $299 to receive his fully complete window from Poland.

My colleague Martin Zgolinski, debesto technologist, provided him with all the necessary technical consultations. We supplied him with installation instructions and videos to assist his fitters with their first attempt at installing a window type they had never installed before.

The result: resolved concerns without risking a lot of money

The trial order provided Francesco with the confidence and assurance needed to proceed smoothly with the full order of 40 windows, 4 patio doors, and an entrance door.

At debesto, we recognize that making the decision to purchase windows from Poland might be not straightforward. It requires verifying the window supplier, evaluating the window quality, and testing your installers’ skills—all from a significant distance.

Therefore, we offer various options for placing a trial order, with a minimal risk of financial loss. You can choose from:

  • window corner sample
  • small window
  • full-sized window
  • glazing set

With a test window, you can inspect the window quality and assess your supplier’s reliability. Ordering a window sample is one of the methods available. For more tips on how to verify a company from Poland, consider reading this article.

Patryk Lakucewicz debesto

about author

Patryk Łakucewicz

As a Key Account Consultant at, I specialize in the aluminum windows and patio doors, with 7 years of experience assisting US building companies.

I’ve completed over 700 orders, showcasing a hands-on understanding of big business needs. I offer practical expertise alongside a proactive approach to meet project goals.

Outside of my professional life, I’m an enthusiast of sports, especially soccer.

Connect with me

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faq – who are we and what do we do?

At, we are experts in providing customized window solutions, including patio doors, blinds, entry, and garage doors, tailored to building professionals: developers, general contractors, architects, and construction project managers.   With over a decade of expertise in European windows, we specialize in assisting construction companies to import windows efficiently and profitably.   With debesto, you gain comprehensive, consultative partnerships designed to enhance your project’s success and minimize your business risk. Our customers appreciate most:
  • - cost-effectiveness
  • - deep business understanding
  • - secure on-site delivery
  • - timeliness
  • - exceptional communication and support
  • - incredibly smooth process
  Need more info? Check how to verify debestoRead what happens after booking a consultation

Delivery time

What is the lead time of an average order?

The total time from manufacture to delivery of the windows to the US port is on average 7-10 weeks depending on the destination port and delivery method that you can choose from debesto delivery price list.

Add to this the production time of the windows (from 2 to 8 weeks).

The maximum expected production time can be found on the pro forma invoice. We deliver 97% of all orders shipped worldwide according to the deadline we declare on the pro forma invoice. If we are late, we give you a 2% discount.

More questions about the delivery? Check Frequently Asked Questions about importing windows to the US

Warranty and safety

Do the products come with an international warranty?

Yes, products are covered by the debesto worldwide warranty, provided they are installed according to the professional standards and applicable regulations in the country of installation.

Are the windows insured during shipment?

Yes, all products are fully insured during transportation, covering the entire value of the products.

Any concerns about potential issues with windows from Poland? Discover 5 main reasons for complaints and ways to solve them

Want to know how much your business can gain by importing joinery from Poland?

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