How to choose PVC windows for an apartment or house

Choosing the right PVC (uPVC) windows is a key step in improving comfort, reducing energy bills and cutting outside noise. This guide walks you through profiles, glazing options, fittings, installation and practical tips to make an informed decision.

1. Window components

Profile — the frame and sash material that determines durability and insulation.
Insulated glazing unit (IGU) — double or triple glazing with inert gas improves thermal performance.
Hardware — hinges, locks, and handles affect functionality and security.
Seals — quality seals ensure airtightness and prevent drafts.

2. Profiles: chamber count and what it means

Profiles typically have 3 to 7 chambers. Chambers are internal air pockets that add insulation:

3–4 chambers: budget options suitable for mild climates or non-critical rooms.
5 chambers: the most balanced choice for apartments and typical houses in Latvia.
6–7 chambers: best for maximum thermal and sound insulation.

Also consider profile depth (60–90 mm), reinforcement inside the profile, and wall thickness.

3. Glazing: double or triple?

Double glazing (two panes) is standard and often sufficient for city apartments.
Triple glazing (three panes) offers better insulation and is recommended for cold exteriors or higher energy efficiency targets.

Other features:

Argon or krypton filling reduces heat transfer.
Low-E coatings reflect radiant heat back into the room.
Window spacer type and glass thickness affect noise reduction.

4. Sound insulation

If the window faces a busy street, choose IGUs with staggered glass thickness and larger air gaps. The profile's sealing system and quality frames also play a major role.

5. Hardware and security

Look for hardware with micro-ventilation, tilt-and-turn options and multi-point locks for added security.
Heavy sashes require reinforced hinges and bearings.

6. Installation and measuring

Correct installation is as important as window choice:

Accurate measurement by an experienced fitter is essential.
The mounting gap should be filled with appropriate insulation foam and protected by vapor and waterproof membranes.
Check how the sill and slopes will be finished — they affect both insulation and appearance.

Tip: Ask the fitter to inspect surrounding elements — sill, ventilation, and building facade — to avoid surprises during installation.

Practical checklist before ordering

Measure the opening precisely and note structural limitations.
Choose a profile with at least 5 chambers and a mounting depth of 70–82 mm for Latvian climate.
Decide on double or triple glazing based on insulation needs and budget.
Specify low-E coatings or safety glass if needed.
Request certificates, warranty and an itemised quote from suppliers.
Confirm installation terms, removal of old frames, and finishing works.

Frequently asked questions (FAQ)

How much do PVC windows cost?

Costs vary by profile, glazing, sizes and fittings. Prices range from economy to premium. Get a precise estimate from a supplier based on your exact sizes and options.

How long do PVC windows last?

With correct installation and maintenance, quality PVC windows last 20–30 years. Regular servicing of hardware and seals extends service life.

Do airtight windows require ventilation?

Yes. Modern airtight windows need proper ventilation — either mechanical ventilation or a window with micro-ventilation function.

Can I install windows myself?

Professional installation is recommended. Incorrect installation can cause drafts, condensation and premature wear.

Conclusion

The best PVC window is a combination of a suitable profile, the right glass unit, quality hardware and professional installation. For most Latvian apartments, a 5-chamber profile with an energy-efficient double glazing and correct mounting depth provides a good balance between comfort and cost. Compare offers from reputable installers and request references and certifications before committing.

How to choose PVC windows for an apartment or house