Window Aftercare
We’re Here For You: Long After Installation.
At Thermaseal, our commitment to quality doesn’t end once your installation is complete. We believe great service continues for years to come — that’s why every customer benefits from our reliable, friendly aftercare and maintenance support.
Whether you need help with product maintenance, a minor adjustment, or simply some advice, our team is always here to help — usually resolving queries within 24 hours.
Guaranteed Peace of Mind
Every Thermaseal product is installed to the highest standards and backed by:
10-year insurance-backed guarantee on frames and workmanship
5-year guarantee on glass and hardware
Certass registration for all installations
You’ll also receive a maintenance booklet that explains exactly how to keep your windows, doors, and conservatories performing perfectly.
Maintenance Guides
To keep your Thermaseal products in top condition, follow these simple care tips:
Windows & Doors
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Clean frames every 3–4 months with mild detergent
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Lubricate hinges and locks annually with silicone-based lubricant
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Avoid abrasive cleaners or harsh chemicals
Composite Doors
- Wipe with warm, soapy water
- Lubricate hinges and locks every 6 months
- Do not use wax polish or solvent cleaners
Conservatory Roofs
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Wash roof panels and frames with soapy water every 4 months
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Clear gutters and downpipes regularly to prevent blockages
Dedicated Support
If you ever experience a problem, our aftercare team will arrange a visit quickly. We aim to resolve most service calls within 24 hours, so you can relax knowing your home is protected by people who care.
Customers Rate Us Highly
Explore recent installations from sash window upgrades to warm roof conversions and see how thoughtful design and careful fitting can transform your home.
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