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Goodbye Street Noise: Do UPVC Windows Really Block Sound? (The Ultimate 2026 Guide)

Do car horns keep you from a deep sleep? Do you feel your home’s privacy is violated by the voices of passersby and neighbors?

If you live in a bustling city like Cairo or Giza, or if your apartment overlooks a main road, you know for a fact that noise is not just a fleeting “annoyance.” It is environmental pollution that affects your nerves, your children’s ability to focus on their studies, and even your sleep quality and mental health.

For years, we believed the only solution was to “get used to it” or to shut the heavy wooden shutters (Shish) that block out air and light without effectively stopping the sound. But as we enter 2026, construction and finishing standards in Egypt have evolved. UPVC windows and doors have emerged as the number one engineering solution to eliminate noise.

In this comprehensive guide from Itqan UPVC, we will take you on a simplified technical tour to explain how sound travels, why traditional Aluminum fails to stop it, and how to choose the right UPVC window specifications to turn your home into a true “oasis of calm.”

1. How Does Noise Leak Into Your Home? (Know Your Enemy)

To solve the problem, you must first understand it. Sound consists of waves that travel through two main mediums:

Air: Any opening, no matter how small (even the size of a pinhole), is considered an “open gate” for sound waves to enter at full strength.
Vibration: Lightweight solid materials (like single glass panes or thin aluminum profiles) vibrate when sound waves hit them, transferring this vibration inside the room as noise.

So, why do traditional windows (Wood or Aluminum) fail?

The Gaps: Traditional Aluminum assembly relies on screws, which leaves microscopic gaps in the corners where air (and sound) can pass through. Wood, on the other hand, warps, expands, and contracts, creating gaps between the frame and the sash.
Vibration Transfer: Metal is an excellent conductor of sound and vibration. Additionally, standard 3mm or 5mm glass is too weak to repel sound energy.

2. Why is UPVC the “Silent Killer” of Noise?

UPVC (Unplasticized Polyvinyl Chloride) is not just plastic; it is a rigid, durable polymer designed specifically for insulation. Here are 4 reasons why it is the global #1 choice for soundproofing:

1. Fusion Welding Technology

Unlike aluminum, which is screwed together, UPVC profile corners are assembled using Fusion Welding (melting the ends and pressing them together).

The Result: The window becomes a single, solid unit with absolutely no joints, gaps, or holes, blocking air leakage (the carrier of sound) by 100%.

2. Multi-Chamber System

If you look at a UPVC profile from the inside (cross-section), you won’t see a hollow tube. You will see it divided into small internal compartments (3, 4, or 5 chambers).

The Function: These chambers act as a “sound maze.” When a sound wave penetrates the first chamber, it weakens. It then moves to the second and weakens further. The more chambers, the higher the insulation.

3. Double EPDM Gaskets

At Itqan UPVC, we use a special type of rubber sealing called EPDM (the same material used in car doors). This rubber does not dry out or crack in the sun.

The Mechanism: There is a gasket line on the frame and another on the sash. When closed, they compress against each other to create an “Air Tight Seal,” cutting off the path for sound completely.

4. The Material Absorbs Sound

UPVC is a non-resonant material. If you knock on aluminum, you hear a “ring.” If you knock on UPVC, you hear a dull “thud.” This means the profile itself absorbs vibrations rather than transmitting them into the room.

3. The Glass: The Real Hero in the Battle for Silence

A strong profile with the wrong glass is only “half a solution.” Glass makes up about 80% of the window’s surface area, so choosing it wisely is the secret to success.

What is Double Glazing?

It consists of two panes of glass separated by a Spacer containing dry air or an inert gas (like Argon).

How it works: Sound hits the first pane, travels through the air gap (which acts as a cushion to absorb the shock), and reaches the second pane significantly weaker.

Pro Tip: The “Asymmetric” Secret

To achieve maximum silence (especially if you live near a bridge or railway), at Itqan UPVC, we recommend using glass panes of different thicknesses.

The Mistake: Installing symmetric glass (e.g., 6mm + spacer + 6mm).
The Correct Way: Installing asymmetric glass (e.g., 6mm + spacer + 4mm).
The Reason: Different thicknesses block different “sound frequencies,” breaking the noise intensity much more effectively.

4. Installation: The Secret No One Tells You

Did you know you could buy the most expensive window in the world and still hear street noise? The reason is the installation.

The gap between the “window frame” and the “wall” is the weakest point.

The Old Way: Stuffing the gap with gypsum or cement (which cracks over time and leaks sound).
The [Itqan UPVC] Way: We use Polyurethane Foam (Expansion Foam) to fill the gap. This foam expands to seal every microscopic cavity, acting as an additional sound barrier around the window, before being covered with high-quality silicone.

5. Quick Comparison Table: UPVC vs. Aluminum

Feature	UPVC Windows	Traditional Aluminum
Sound Insulation	Very High (Reduces up to 35-40 dB)	Low to Medium
Assembly Method	Fusion Welding (100% Sealed)	Screws (Mechanically joined/Loose corners)
Thermal Effect	Total Insulator (Saves AC energy)	Conductor (Traps heat)
Maintenance	No painting needed, never rusts	Accessories may wear out, paint may fade
Cost	Medium/High Investment	Varies (Cheap to Expensive)

6. Frequently Asked Questions (FAQ)

1. Will UPVC windows block 100% of the sound?

Let’s be honest: “100% soundproof” does not exist unless you live in a windowless concrete bunker. However, UPVC windows reduce noise by 80% to 90%.

Practical Result: Loud street noise turns into a faint background whisper or hum, which is a very comfortable level for sleeping and working.

2. Does the profile color affect insulation?

No. Whether you choose White, Beige, or Golden Oak (Wood effect), the sound insulation efficiency remains the same. The difference is purely aesthetic.

3. Which opening style is better: Sliding or Casement?

Technically, the Casement (Hinged) system offers slightly higher insulation than sliding windows because the gasket is compressed tighter when locked. However, modern Sliding systems at Itqan UPVC utilize advanced sealing technologies that offer excellent results as well.

Conclusion: Is It Worth the Investment?

Buying UPVC windows is not just about “finishing an apartment”; it is an investment in your health and peace of mind.

Imagine the difference between waking up startled by a street vendor’s shout versus waking up calmly in a silent, climate-controlled room. This peace is priceless.

At [Itqan UPVC], we don’t just sell you a window; we sell you “Peace of Mind.”

Are you ready to mute the world?

Our engineering team is ready to inspect your home, measure noise levels, and propose the perfect solution (profile type and glass) that fits your budget and needs.

📞 Contact us today via WhatsApp or Phone: 010 162244

📍 Address:

357 Central Axis / Above El Menoufy El Kababgi / Directly opposite El Tawheed & El Nour / 2nd District / 6th of October City, Egypt.