Can only the glass unit be replaced

Can only the glass unit be replaced?

Homeowners frequently ask whether a fogged, cracked or inefficient insulated glass unit (IGU) requires replacing the whole window or if swapping only the IGU is enough. In short: most of the time you can replace just the IGU — provided the frame and hardware are in good condition.

When replacing only the IGU is acceptable

• Window frame and sash are undamaged: no serious warping, cracks, or structural faults.
• Hardware (hinges, handles, locks) functions correctly and the sash closes tightly against seals.
• No significant frame deformation or sash misalignment.
• The frame profile allows installation of a thicker or different-type IGU if you want improved thermal or acoustic properties.

When the whole window should be replaced

• The frame is warped, damaged or compromised structurally.
• Worn-out hardware causes poor closing, drafts, or leaks.
• The opening has shifted due to building settlement or other structural changes.
• You need a different opening type, larger glazing area, or change of frame material.

What “IGU replacement” includes

• Removing the old IGU from the sash (taking off beading and trims).
• Measuring the opening and ordering a new IGU (single, double, triple glazed, low-E coating, argon-filled, laminated, etc.).
• Installing the new unit, sealing it and checking the sash fit and seals.
• Adjusting hardware if required and final quality checks.

Advantages of replacing only the IGU

• Cost-effective: IGUs are usually significantly cheaper than whole window replacements.
• Faster: one window can be completed in a few hours when no additional repairs are needed.
• Opportunity to upgrade: install better thermal glass or acoustic glazing without replacing the frame.

Disadvantages and risks

• Hidden frame problems may cause repeat failures or problems after IGU replacement.
• Poor installation can lead to reoccurrence of fogging or sealing issues.

Cost and timeframe

Price varies according to the IGU type (double/triple glazed, low-E, argon gas, laminated or tinted), size and installation complexity. Typical lead times in Latvia:

• Standard double glazed units — economical option.
• Low-E/argon-filled or warm-edge spacer units — 20–40% more expensive but more energy efficient.

Manufacturing usually takes 2–7 business days. Installation is typically 1–3 hours per standard window.

Practical tips

• Have a qualified technician inspect the frame and hardware before ordering an IGU.
• Choose a reliable supplier and confirm warranty terms on both the IGU and the installation.
• If keeping the window long-term, consider investing in a higher-performance IGU for better savings.
• If the frame or hardware is compromised, opt for a full window replacement.

Frequently Asked Questions (FAQ)

Can I replace the IGU myself?

Technically possible, but risky without the right tools and experience. Mistakes can damage the profile, seals or hardware. Professional installation is recommended.

How do I know the IGU is failing?

Common signs: permanent fogging between panes, visible seal damage, condensation inside the unit, sudden loss of thermal comfort.

How long does it take to make a new IGU?

Usually 2–7 business days depending on the order complexity and production scheduling.

Is IGU replacement done in winter?

Yes, but certain sealants and procedures may be affected by low temperatures. Choose an experienced installer who knows winter work practices.

Will the window warranty remain after IGU replacement?

It depends on the manufacturer's and installer's warranty terms. Verify this before work begins.

If you want, DK-Logi can arrange a free inspection and a tailored estimate — that way you’ll get precise advice for your window and accurate pricing.