23/12/25

5 Mistakes to Avoid When Choosing Plastic Windows

Choosing PVC windows is a significant investment, and it’s important to avoid common pitfalls that lead to unnecessary expenses or disappointment. Let’s look at the key mistakes and how to prevent them.

1. Underestimating Profile Quality
Many buyers focus solely on price without considering profile specifications. Thicker outer walls ensure a longer service life and greater resistance to deformation. Tip: carefully review technical specifications and ask the seller for documentation that confirms quality standards.

2. Choosing the Wrong Insulating Glass Unit
A single‑pane insulating glass unit is cheaper but significantly inferior in thermal and sound insulation. In regions with cold winters, a double‑pane unit — especially with an additional energy‑saving coating — is preferable. Tip: check the heat transfer resistance coefficient (U‑value); a higher value means better heat retention.

3. Cutting Corners on Opening Mechanisms
Low‑quality hardware wears out quickly, leading to drafts, misalignment, and difficulty opening. Tip: opt for windows with reliable mechanisms that offer multiple compression points and adjustable settings. Pay attention to how smoothly the sash moves when examining a sample.

4. Lack of Internal Reinforcement
Some manufacturers save on profile reinforcement, which can cause warping due to temperature fluctuations. Tip: confirm whether steel reinforcement is included in the design. It should be of sufficient thickness and have a closed loop for maximum rigidity.

5. Poor Installation Practices
Even the highest‑quality window will fail to perform if installed incorrectly — with misalignment, poor seals, or inadequate insulation. Tip: sign a formal contract with a warranty for installation work, and oversee key stages: frame alignment, joint sealing, and sash adjustment.

How to Avoid Mistakes:

• thoroughly review technical specifications;
• avoid chasing the lowest price;
• verify the presence of all reinforcing elements;
• entrust installation to experienced professionals with a proven reputation.

This approach will help you select windows that will serve for many years without additional costs for repairs or adjustments.