Tips for replacing windows in the new Lithuanian project

Tips for replacing windows in the new Lithuanian project

Replacing windows in a new Lithuanian project requires attention to climate considerations, building rules and installation quality. This guide covers practical steps: choosing profiles and glazing, measuring, installation details and final acceptance.

Why a proper approach matters

• Lithuania's cold seasons and humidity make thermal and moisture protection essential.
• Poor installation leads to drafts, mold and higher heating bills.
• New projects often have architectural or facade requirements — color and mounting constraints should be checked in advance.

Step 1. Project preparation and checks

1. Verify building type and façade regulations in the project documentation: allowable profiles, colors and mounting offsets.
2. Coordinate schedule and access with the developer or building management to ensure equipment and debris removal are arranged.
3. Consult a ventilation engineer: energy-efficient windows often require planned ventilation to maintain indoor air quality.

Step 2. Window selection: profile and glazing units

• PVC profile: choose at least a five-chamber profile with good thermal performance. Reinforced profiles are common in multi-storey buildings.
• Insulating glass units: double-glazed units with argon fill or low-e coating are standard. For noise reduction, use asymmetric glass thickness and a wider cavity.
• Opening type: tilt-and-turn is convenient for ventilation; fixed or sliding units may suit balconies or loggias.

Step 3. Measurements and tolerances

• Measurements should record width, height, reveal depth and sill position. Use a certified measurer or experienced fitter.
• Allow a construction gap (usually 10–20 mm around the frame) for foam, tapes and expansion.
• Confirm floor level and façade marks — finishing layers can affect final size.

Step 4. Installation: technology and nuances

• Drainage: the profile and sub-sill must ensure proper water runoff and condensation removal.
• Anchoring: anchors depend on wall material (brick, concrete, aerated blocks). Incorrect fixings are a common cause of misalignment.
• Insulation and vapor control: use a vapor-permeable external membrane and an internal vapor barrier tape. Seal joints with PU foam and sealing tapes.
• Sill, drip edge and reveals: match materials to the façade finish and waterproofing requirements.

Step 5. Acceptance and quality check

• Test seal tightness, hardware operation, absence of play and micro-ventilation settings.
• Inspect the perimeter joint for an even foam layer and proper sealing tapes and drainage details.
• If needed, perform thermal imaging to identify thermal bridges or moisture spots.

Practical tips for Lithuanian projects

• Consider wind loads and humidity — select profiles and glazing with adequate structural and thermal properties.
• For units facing busy streets prioritize acoustic glazing.
• New projects may limit frame colors — confirm allowed RAL shades early.
• Contract terms should include timelines, warranty and defect remediation procedures.

Cost and timeline estimates

• Manufacturing of custom profiles and IGUs typically takes 2–6 weeks depending on specifications.
• Installation for a single apartment usually takes 1–3 working days depending on scope.
• Budget for old window removal, debris removal, facade work and internal finishing.

Pre-order checklist

• Confirmed sizes and tolerances.
• Facade and color requirements clarified.
• Wall material and anchoring details known.
• Contract with warranty, schedule and access conditions.

FAQ — Frequently asked questions

Q: Do I need permission to replace windows in a new Lithuanian project?

A: In most cases internal window replacement does not require special permission, but external appearance changes (frame color, visible trims) often need approval from the developer or building management.

Q: What temperature and humidity can PU foam tolerate?

A: Modern installation foams work down to about -10°C, but dry and positive temperatures are preferable for reliable curing.

Q: Can the sill be kept when replacing windows?

A: Sometimes yes, but for proper waterproofing and insulation the sill is often modified or replaced.

Q: How long do PVC profiles last?

A: With correct installation and maintenance, PVC profiles can last 30+ years; manufacturer warranties typically cover 5–10 years for profiles and hardware.

Q: Is a mosquito screen necessary in Lithuania?

A: While summers are moderate, screens are useful to allow ventilation without insects.

If desired, we can prepare a measuring checklist and a draft installation contract tailored to Lithuanian project rules.