--- title: Thermaseal FAQs | Windows, Doors & Conservatories Questions description: Find answers to common questions about Thermaseal’s windows, doors, conservatories, guarantees, and aftercare. Trusted local installers across Nottinghamshire. --- - [Request An Appointment](https://www.thermaseal.uk.com/request-an-appointment) - [Get A Free Quote ](https://www.thermaseal.uk.com/get-a-free-quote) - [Contact](https://www.thermaseal.uk.com/contact-us) [![Thermaseal-logo](https://www.thermaseal.uk.com/hs-fs/hubfs/Thermaseal-logo.webp?width=229&height=70&name=Thermaseal-logo.webp "Thermaseal-logo")](https://www.thermaseal.uk.com/) [![Thermaseal-logo](https://www.thermaseal.uk.com/hs-fs/hubfs/Thermaseal-logo.webp?width=229&height=70&name=Thermaseal-logo.webp "Thermaseal-logo")](https://www.thermaseal.uk.com/) - [About Us](https://www.thermaseal.uk.com/about-us) - Products - [Windows](https://www.thermaseal.uk.com/windows) - [uPVC](https://www.thermaseal.uk.com/upvc-windows) - [Aluminium](https://www.thermaseal.uk.com/aluminium-windows) - [Casement](https://www.thermaseal.uk.com/casement-windows) - [Sash](https://www.thermaseal.uk.com/upvc-sash-windows) - [Tilt and Turns](https://www.thermaseal.uk.com/tilt-and-turn-window) - [Doors](https://www.thermaseal.uk.com/doors) - [uPVC and Composite Front Doors](https://www.thermaseal.uk.com/upvc-composite-front-doors) - [French, Patio, and Bi-Fold Doors](https://www.thermaseal.uk.com/french-patio-bifold-doors) - [Conservatories & Orangeries](https://www.thermaseal.uk.com/conservatory-installations) - [Replacement Roofs & Roofline Products](https://www.thermaseal.uk.com/roof-replacement-roofline) - Other Services - [Soffits, Fascias and Guttering](https://www.thermaseal.uk.com/upvc-fascias-soffits-guttering) - [Porch Installations](https://www.thermaseal.uk.com/porch-installations) - Services - [Full Design and Build Service](https://www.thermaseal.uk.com/design-and-build-services) - [Aftercare](https://www.thermaseal.uk.com/door-and-window-aftercare) - [Visit Us](https://www.thermaseal.uk.com/trade) - Resources - [Blog](https://www.thermaseal.uk.com/blog) - [FAQs](https://www.thermaseal.uk.com/faqs) - [Contact us](https://www.thermaseal.uk.com/contact-us) [![Get A Free Quote](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/146943416/interactive-279844371684.png)](https://www.thermaseal.uk.com/hs/cta/wi/redirect?encryptedPayload=AVxigLL7I1aaxGuWorIyBzJBEDbxwlBMyL%2FjUN865V1DXZNph36ajuSIIx76h63AnfHGFn4ppGJ3BnCGBRHvRuQiS0WLxWe4mhQvayJATjiwliTwLwgBZ77NNXZWtmZtjvMGUpoy4mn6Fz1QzQAkpFQjjYxEp6fBZYKsaDlleDB%2BMrHMcB3YnI0vJX2MfJP9%2BTT9aq%2FSLYXbwA%3D%3D&webInteractiveContentId=279844371684&portalId=146943416) [![Get A Free Quote](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/146943416/interactive-279844371684.png)](https://www.thermaseal.uk.com/hs/cta/wi/redirect?encryptedPayload=AVxigLL7I1aaxGuWorIyBzJBEDbxwlBMyL%2FjUN865V1DXZNph36ajuSIIx76h63AnfHGFn4ppGJ3BnCGBRHvRuQiS0WLxWe4mhQvayJATjiwliTwLwgBZ77NNXZWtmZtjvMGUpoy4mn6Fz1QzQAkpFQjjYxEp6fBZYKsaDlleDB%2BMrHMcB3YnI0vJX2MfJP9%2BTT9aq%2FSLYXbwA%3D%3D&webInteractiveContentId=279844371684&portalId=146943416) [![Get A Free Quote](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/146943416/interactive-279844371684.png)](https://www.thermaseal.uk.com/hs/cta/wi/redirect?encryptedPayload=AVxigLL7I1aaxGuWorIyBzJBEDbxwlBMyL%2FjUN865V1DXZNph36ajuSIIx76h63AnfHGFn4ppGJ3BnCGBRHvRuQiS0WLxWe4mhQvayJATjiwliTwLwgBZ77NNXZWtmZtjvMGUpoy4mn6Fz1QzQAkpFQjjYxEp6fBZYKsaDlleDB%2BMrHMcB3YnI0vJX2MfJP9%2BTT9aq%2FSLYXbwA%3D%3D&webInteractiveContentId=279844371684&portalId=146943416) More results - [About Us](https://www.thermaseal.uk.com/about-us) - Products - [Windows](https://www.thermaseal.uk.com/windows) - [uPVC](https://www.thermaseal.uk.com/upvc-windows) - [Aluminium](https://www.thermaseal.uk.com/aluminium-windows) - [Casement](https://www.thermaseal.uk.com/casement-windows) - [Sash](https://www.thermaseal.uk.com/upvc-sash-windows) - [Tilt and Turns](https://www.thermaseal.uk.com/tilt-and-turn-window) - [Doors](https://www.thermaseal.uk.com/doors) - [uPVC and Composite Front Doors](https://www.thermaseal.uk.com/upvc-composite-front-doors) - [French, Patio, and Bi-Fold Doors](https://www.thermaseal.uk.com/french-patio-bifold-doors) - [Conservatories & Orangeries](https://www.thermaseal.uk.com/conservatory-installations) - [Replacement Roofs & Roofline Products](https://www.thermaseal.uk.com/roof-replacement-roofline) - Other Services - [Soffits, Fascias and Guttering](https://www.thermaseal.uk.com/upvc-fascias-soffits-guttering) - [Porch Installations](https://www.thermaseal.uk.com/porch-installations) - Services - [Full Design and Build Service](https://www.thermaseal.uk.com/design-and-build-services) - [Aftercare](https://www.thermaseal.uk.com/door-and-window-aftercare) - [Visit Us](https://www.thermaseal.uk.com/trade) - Resources - [Blog](https://www.thermaseal.uk.com/blog) - [FAQs](https://www.thermaseal.uk.com/faqs) - [Contact us](https://www.thermaseal.uk.com/contact-us) [![Get A Free Quote](https://hubspot-no-cache-eu1-prod.s3.amazonaws.com/cta/default/146943416/interactive-279844371684.png)](https://www.thermaseal.uk.com/hs/cta/wi/redirect?encryptedPayload=AVxigLL7I1aaxGuWorIyBzJBEDbxwlBMyL%2FjUN865V1DXZNph36ajuSIIx76h63AnfHGFn4ppGJ3BnCGBRHvRuQiS0WLxWe4mhQvayJATjiwliTwLwgBZ77NNXZWtmZtjvMGUpoy4mn6Fz1QzQAkpFQjjYxEp6fBZYKsaDlleDB%2BMrHMcB3YnI0vJX2MfJP9%2BTT9aq%2FSLYXbwA%3D%3D&webInteractiveContentId=279844371684&portalId=146943416) #### [![Thermaseal-logo](https://www.thermaseal.uk.com/hs-fs/hubfs/Thermaseal-logo.webp?width=216&height=66&name=Thermaseal-logo.webp)](https://146943416.hs-sites-eu1.com/) [mailto:info@thermaseallimited.co.uk](mailto:info@thermaseallimited.co.uk)  [0115 986 68 99](tel:01159866899) [  info@thermaseallimited.co.uk](mailto:info@thermaseallimited.co.uk) # Frequently Asked Questions (FAQs) ## Everything You Need To Know About Our Products And Services. At Thermaseal, we understand that replacing windows, doors, or building a conservatory is a big decision. That’s why we’ve answered some of the most common questions our customers ask — to give you complete confidence before you choose us. Do your products help with condensation? Yes. Our **A-rated double glazing** helps minimise condensation by improving thermal performance and maintaining a more consistent indoor temperature. Proper ventilation also helps, which is why our windows include trickle vents as standard. What energy rating are your windows and doors? All Thermaseal windows and doors are **A-rated for energy efficiency**, helping you keep your home warmer while reducing your energy bills. What profiles and materials do you use? We use **high-quality uPVC and aluminium profiles**, combined with **Planitherm Argon-filled glazing** and **Kubu locking systems**. Each product meets **BS standards** and is internally beaded for extra security. What guarantees do you offer? Every Thermaseal installation comes with a **10-year insurance-backed guarantee** on frames and workmanship, and **5 years on glass and hardware**. All our work is **Certass-registered** for full compliance and peace of mind. Are you Certass registered? Yes. Thermaseal is fully **Certass-accredited**, meaning all installations meet strict quality and safety standards. Our certification also ensures your guarantees are insurance-backed. Do you take away old frames and materials? Yes, absolutely. We remove and responsibly dispose of all old frames, glass, and waste materials — leaving your home clean and tidy after every installation. Do you cover repairs and aftercare? Yes. We provide full **aftercare support** for all our installations. Whether you need an adjustment, a repair, or some maintenance advice, our team will help quickly — usually within **24 hours**. How quickly can I get a quote? Most quotes are provided **within 24–48 hours** of your enquiry. For larger projects, such as conservatories or orangeries, we may arrange a free home visit and design consultation. What areas do you cover? We serve homeowners across **Nottingham, Mansfield, Derby, and surrounding Nottinghamshire areas** — offering the same friendly, reliable service wherever you are in the region. ## Request Your Free Quote Today ## 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. ![google1](https://www.thermaseal.uk.com/hubfs/google1.svg) Reviews 4.9 ★ ★ ★ ★ ★ 30 reviews ❮ ❯ ★ ★ ★ ★ ★ Replaced 30 year old windows!! Excellent service. Prompt and efficient. Fair price too.Left clean and tidy inside and out. — Sharon Walker ★ ★ ★ ★ ★ Brilliant local company. Honest, reliable, quick and efficient service. Wonderful team of lads throughout whole process from enquiry to fitting. Would definitely recommend .. — Jennifer Watson ★ ★ ★ ★ ★ Replaced patio doors. Excellent workmanship. Great couple of lads. Upvc doors are very high quality made. Would recommend 👍👍👍👍👍 — Rhbzuk ★ ★ ★ ★ ★ George and everyone we’ve dealt with at Thermaseal have been a pleasure to do business with. They worked together, as a great team, to look after our needs; from sourcing quality products, to installation, and after-sales care .... — Colin Failes ★ ★ ★ ★ ★ Excellent service. They arrived promptly and did a wonderful and neat job of the new window. Paul was happy to assist with further information which we required. A great team, ... — shaila gallagher ★ ★ ★ ★ ★ Thermaseal replaced two bay windows and two casement windows for us and we would highly recommend them. They were a pleasure to deal with from start to finish, very professional and friendly. They gave us the best quote out of ... — Kate M #### [![Thermaseal-logo](https://www.thermaseal.uk.com/hs-fs/hubfs/Thermaseal-logo.webp?width=216&height=66&name=Thermaseal-logo.webp)](https://www.thermaseal.uk.com/)   [0115 986 68 99](tel:01159866899) [ info@thermaseallimited.co.uk](mailto:info@thermaseallimited.co.uk) Services - [Full Design And Build Service](https://www.thermaseal.uk.com/design-and-build-services) - [Aftercare](https://www.thermaseal.uk.com/door-and-window-aftercare) - [Visit Us](https://www.thermaseal.uk.com/trade) - [Get A Free Quote](https://www.thermaseal.uk.com/get-a-free-quote) Resources - [FAQs](https://www.thermaseal.uk.com/faqs) - [Contact Us](https://www.thermaseal.uk.com/contact-us) - [About Us](https://www.thermaseal.uk.com/about-us) - [Submit Your Pictures](https://www.thermaseal.uk.com/submit-your-pictures) - [Request An Appointment](https://www.thermaseal.uk.com/request-an-appointment) Copyright © 2026 Thermaseal Windows & Doors Ltd. Designed & developed by [JDR Group](http://www.jdrgroup.co.uk). - [Terms](https://www.thermaseal.uk.com/terms-and-conditions) - [Privacy](https://www.thermaseal.uk.com/privacy-policy) - [Cookie](https://www.thermaseal.uk.com/cookie-policy) ```json { "@context" : "https://schema.org", "@type" : "LocalBusiness", "address" : { "@type" : "PostalAddress", "addressCountry" : "UK", "addressLocality" : "Nottingham", "addressRegion" : "Nottinghamshire", "postalCode" : "NG2 3GW", "streetAddress" : "Unit 4 Brand St" }, "alternateName" : "Thermaseal Windows & Doors", "contactPoint" : { "@type" : "ContactPoint", "areaServed" : "GB", "availableLanguage" : "en", "contactType" : "customer service", "telephone" : "+44 115 647 7736" }, "geo" : { "@type" : "GeoCoordinates", "latitude" : 52.9447, "longitude" : -1.1429 }, "image" : "https://www.thermaseal.uk.com/hs-fs/hubfs/UPVC-WIndows-White-Dual-Glazed-Composite-Door-Forest-Close-After.webp", "logo" : "https://www.thermaseal.uk.com/hs-fs/hubfs/Thermaseal-logo.webp", "name" : "Thermaseal Windows & Doors Ltd", "openingHours" : [ "Mo 08:00-17:00", "Tu 08:00-17:00", "We 08:00-17:00", "Th 08:00-17:00", "Fr 08:00-17:00", "Sa Closed", "Su Closed" ], "priceRange" : "£", "sameAs" : [ "https://www.facebook.com/ThermasealLtd/", "https://www.instagram.com/thermasealwindows/" ], "telephone" : "0115 986 68 99", "url" : "https://www.thermaseal.uk.com/" } ``` ```json { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [{ "@type": "Question", "name": "Do your products help with condensation?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. 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