What Insurance Factors Should I Consider When Changing My Windows & Doors?

When upgrading your windows and doors, most homeowners focus on looks, energy efficiency, or price. But there’s another crucial area: your home insurance.

Failing to tell your insurer about changes could invalidate your policy. Here’s a simple guide to the key insurance factors to consider when changing your windows and doors.

1. Security Standards and Locks

Insurance companies expect certain security standards:

• External doors should have multi-point locking systems.

• Accessible windows (ground floor or those reachable from outside) should have key-operated locks.

• PAS 24 certification is a strong selling point – this proves your windows and doors meet police-approved security testing.

If your new units don’t meet these standards, your insurer may view your home as a higher risk.

2. Material Changes

Changing from timber to uPVC or aluminium is fine, but you must let your insurer know if you:

• Replace small windows with large glazed doors (like bi-folds or sliders).

• Increase the amount of glass in your home.

These changes can affect how insurers calculate risk.

3. Value of the Property

New windows and doors increase the rebuild cost of your property. This is what insurers use to set premiums.

• Installing premium systems (triple glazing, steel-look aluminium, bespoke timber) can raise this cost.

• If you don’t update your policy, you could be underinsured – meaning you won’t get a full payout if you need to claim.

4. Compliance with Building Regulations

One of the biggest insurance factors to consider when changing your windows and doors is compliance with UK Building Regulations.

Insurance providers expect proof that your installation meets these rules:

• Part L (Conservation of Fuel and Power): Ensures your windows and doors meet energy efficiency standards. Insurers want to know your home isn’t losing heat through poor-quality glazing.

• Part F (Ventilation): Requires trickle vents in most replacement windows and doors (since June 2022). If ignored, you could suffer condensation or mould – and insurers may reject claims for related damage.

• Part Q (Security): For new-build homes, doors and windows must meet Part Q security standards, such as PAS 24 tested systems. If not, a break-in claim could be questioned.

• Installation Certification (FENSA or CERTASS): Using a registered installer provides a compliance certificate. Without this, insurers may treat your installation as non-compliant.

In short: If your windows and doors don’t comply with Building Regulations, your insurer can legally refuse related claims – even years later.

5. Professional Installation & Certification

Most insurers expect you to use a FENSA or CERTASS registered installer. These certifications prove your new windows and doors meet UK standards.

• Without certification, insurers may challenge a claim.

• Some may even refuse cover altogether until certification is provided.

6. Temporary Risk During Installation

If your home is unsecured during installation (for example, old doors removed and new ones delayed), your insurer needs to know. They may:

• Exclude cover for that period, or

• Add conditions to reduce risk.

7. Potential Premium Reductions

The right upgrades can work in your favour:

• High-security locks, laminated glass, and PAS 24 certification may reduce your premium.

• Energy-efficient glazing shows compliance with Part L and makes your home less costly to run, another positive factor.

Quick FAQs on Insurance and Windows/Doors

Do I need to tell my insurer if I change my windows and doors?
Yes – you must always declare changes. Otherwise, your policy could be invalid.

What happens if I don’t tell my insurer about changing my windows and doors?
If you fail to declare:

• Your insurer may refuse to pay out for break-ins or weather damage.

• They could cancel your policy entirely for “non-disclosure.”

• You could be left paying for repairs or replacements out of your own pocket.

Can better windows and doors reduce my premiums?
Yes – if you upgrade to secure, PAS 24 certified doors and windows, some insurers may offer lower premiums.

Do FENSA or CERTASS certificates matter for insurance?
Yes – they prove compliance with Building Regulations. Without them, insurers may treat your installation as non-compliant.

What insurance factors should I consider before upgrading my windows and doors?

• Security standards (PAS 24, multi-point locks).

• Compliance with Building Regulations (Parts L, F, Q).

• Certification (FENSA or CERTASS).

• Change in rebuild cost.

• Whether the upgrades increase or reduce risk.

In summary: When thinking about insurance factors to consider when changing your windows and doors, focus on compliance, security, certification, and property value. Declaring changes isn’t just good practice – it’s essential. The right upgrades can even improve your cover and reduce premiums, but failing to declare them could leave you uninsured.