Tips for insulation and soundproofing with Rehau Synego windows

Why Rehau Synego matters for insulation and soundproofing

Rehau Synego is a modern PVC profile with thoughtful multi-chamber geometry and the ability to host wide, efficient glazing units. To achieve the best thermal and acoustic results you need a balanced approach: the right glass unit, quality seals and professional installation. Below are practical recommendations to maximize performance.

1. Choosing the glass unit: thermal vs acoustic

• For thermal insulation: select Low-E coatings and insulating gas fills (argon or krypton) between panes. Triple glazing significantly improves U-value.
• For soundproofing: laminated (PVB) glass and asymmetric pane thicknesses help damp vibrations and reduce sound transmission.
• Combine both goals: a Low-E, argon-filled unit with at least one laminated pane gives a good compromise between heat retention and noise reduction.

2. Profile and seals

• Rehau Synego provides room for wide glazing units. Check the profile’s installation depth and thermal class when ordering.
• Multi-contour EPDM/TPV seals (two or three) enhance air tightness and lower noise ingress.
• Inspect and replace seals every 3–5 years; aged seals harden and lose effectiveness.

3. Correct installation is essential

• Follow the principle: external waterproofing — insulating fill — internal vapor barrier. That means: outside — protective tape or sealant; middle — insulating foam or backer rod; inside — vapor-tight tape to prevent condensation.
• Use low-expansion PU foam and acoustic sealant for gaps. For wide joints, use a backer rod before sealing.
• Avoid thermal bridges: fix the frame to the structural opening with proper anchors and mounting plates as recommended.

4. Window finish: sills and reveals

• Warm interior reveals and proper insulation behind the sill are crucial. A cold reveal negates window performance.
• Ensure the sill does not seal off required ventilation paths; allow small designed gaps if needed for moisture control.

5. Extra measures against noise

• External protection: roller shutters or external blinds reduce street noise and add thermal protection.
• Interior absorption: heavy curtains, acoustic panels and furniture placement near the window help absorb reflected sound.
• Secondary glazing: adding an inner window or upgrading to thicker/asymmetric glazing can be considered for very noisy locations.

6. Ventilation and condensation control

• Highly airtight windows require controlled ventilation. Install trickle vents or a mechanical ventilation system with recovery to avoid moisture build-up.
• Relying on constant micro-ventilation in winter is inefficient; schedule regular airing or use mechanical systems.

7. Maintenance tips

• Clean and lubricate seals and moving parts annually with appropriate silicone-based products.
• Check hardware alignment; a misaligned sash reduces sealing performance.
• If drafts or excess noise appear, call a qualified installer to check the mounting gap and seal integrity.

FAQ — Common questions

Can I improve soundproofing without replacing the window?

Yes. Replacing the glass unit with a laminated or thicker pane, improving the mounting seam with acoustic sealant, upgrading seals, or installing external shutters and thick curtains often yields a big improvement without changing the whole window.

Which glazing is best near a busy road?

A laminated glass layer combined with asymmetric pane thicknesses and argon filling is a good choice. Triple glazing with one laminated pane will give both thermal and acoustic benefits.

Does Rehau Synego need special mounting?

No special method beyond professional installation. The installer must respect the external waterproofing — insulation — internal vapor barrier workflow, correct anchors, and maintain recommended joint widths.

How to avoid condensation after window replacement?

Ensure proper indoor ventilation and correct internal vapor barrier. Condensation typically signals inadequate ventilation rather than a defective window.

How long do seals last?

Typically 5–10 years depending on climate and use. Replace seals that have hardened, cracked or lost elasticity.

If you want, we can calculate a recommended glazing and mounting kit for your specific Rehau Synego window. Provide wall type, window orientation and external noise level and we’ll prepare a tailored recommendation.