Why does a plastic window whistle when ventilating?

The irritation from a nauseating whistle or the sound of a plastic window open for ventilation is familiar to many Minsk residents, especially in new buildings.

I, Dmitry, a private window repairman with experience since 2003, will tell you where this sound comes from and how to get rid of it.

Physics of phenomena: where does this sound come from?

Imagine a narrow gap between the shutter and the frame when the pen is in the "ventilation" position. A strong stream of cold street air created by the natural pull of ventilation (especially strong in high-rise houses in winter) passes through this gap at high speed. When this stream meets a sharp or insufficiently elastic edge of the sealant, sound oscillations occur; the same piercing whistle or low scream.

The main culprit: not just a "cutting" but a thermoplastic elastomer

This is a key misconception: most modern windows, especially budget windows, do not have a classic rubber sealant (EPDM), but a cheap analogue.The term is used to describe the amount of heat transfer.- What?

What's wrong with him?

• I'm not going to. Low cold resistance.In the cold, this material 'laquo's'raquo, losing its elasticity, and its edge becomes sharp as a blade.
• I'm not going to. The perfect acoustics.The hard, flat edge of the TEP compactor perfectly cuts through the air flow, creating sound.
• I'm not going to. The manufacturer's savings.These seals are often used in coextrusion technology; they're inserted directly into the profile when manufactured.

How do you tell a high-quality sealant?EPDM is soft, matte, and it's flexible even in the cold. Thermal plastics can be more glossy, and in the cold, it's like hard plastic.

3 working ways to remove window whistle

If your window is jammed, don't change it.

Method 1. Radical and 100% solution: replace the sealant with a high-quality EPDM

Even if the sealant is co-extruded, it can be carefully removed and inserted into the same fastener with the classic EPDM elastic cord from a proven manufacturer.

The result:The whistle disappears completely, because the soft, rounded edge of the new sealant does not cause any turbulent air oscillations.

Method 2: Temporary measure: adjust the squeeze of the crease

Sometimes tightening the clamps around the perimeter of the shutter (using eccentrics on the toe) can change the geometry of the hole when micro-ventilating and remove the whistle.Replacement of the sealant- What?

Method 3: Alternative cause of failure: assembly seams

If the window whistlesWhen the gate is completely closedThe sound is from the seam between the frame and the wall. Over time, the sealant (pen, silicone) can move away, cracking, creating micro-slit that can be "squeezed" on the wind.

Why should I be the one to replace the sealant?

• ✔ What is it? 20+ years of experience.I've been working with plastic windows since 2003, I know all the details of profiles and sealants.
• ✔ What is it? Free travel and diagnosisI'll determine the cause of the whistle and propose the best solution.
• ✔ What is it? The materials are of high quality.I'm only using a proven Schlegel sealant from EPDM that will last for years.
• ✔ What is it? Guarantee up to 1 yearfor all sealing and adjustment work, in writing.
• ✔ What is it? Cleanliness and cleanliness.I work without dirt, clean up after myself.

Frequently Asked Questions

Windows whistle removal services

If the window is running or the sound is not going through

What if the window is powered or you put the windows with ventilation, but the sound doesn't go through: the cause is usually a hollow valve, a slit or geometry.