01275 342 656

1 Tweed Road, Clevedon, BS21 6RR

Window FAQs

We’ve compiled a list of the most frequently asked questions we receive when it comes to replacing windows, so no matter what style of window or glazing you’re replacing, we’re here to help you find the right solution for your South West home.
How do I know when I should replace my windows?

If you’ve noticed condensation building up between the panes of your double-glazed windows, it could indicate that the window seals have failed, allowing moisture to enter your home. Once a seal is compromised, any insulating gas that made the window energy-efficient is lost. As a result, your double glazing becomes ineffective, potentially leading to higher energy bills. Moisture issues can contribute to mould growth, which has been linked to health problems like skin rashes, respiratory issues, and other allergic reactions, making it essential to resolve moisture concerns before they worsen.

If you’re having trouble opening or closing your windows, it might suggest that they weren’t installed properly, potentially leading to balance problems that make them hard to operate. Windows that are rusting or rotting can also become difficult to use. In addition, if you’re unable to fully close your windows, you might not be able to lock them, compromising the security of your home.

Excessive noise from outside could mean your windows aren’t effectively soundproofing your home, which could be a sign of poor sealing. Feeling a draught even when the windows are closed is another indication that the seals might be faulty.
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When it comes to choosing a material for your windows, we offer 3 choices: uPVC, timber effect, or aluminium. Each of these styles has different features and benefits and the material you choose will be down to your own personal preference and needs.

uPVC: As the most popular window material, uPVC is well known for its remarkable reliability, hardwearing finish and for how easy it is to keep clean. It’s also a more budget-friendly option than other window materials. We offer an eclectic mix of uPVC window styles, such as casement, sliding sash, tilt and turn, mock sash, bay, reversible, and bow windows.

Whether you live in a more traditional or contemporary home, we are sure to have the uPVC window style perfect for you. Regardless of your choice, all of our uPVC windows promise to add style, thermal performance, and security.

Timber effect: Timber frame windows are made from wood and have a more traditional look. Although they look beautiful, they require more maintenance and can be expensive. For homeowners who are considering replacement windows, we offer gorgeous timber effect frames.

Residence Collection windows are extremely stylish and designed to look like traditional wooden windows. The two windows we offer in the Residence Collection are R7 & R9 – with slightly different features, you gain the freedom to choose the windows that are most suited to your taste and requirements.

Regardless of which style you opt for, all are made from modern and high-performance uPVC, with multiple chambers within the frame. Capable of holding double and triple glazing, you and your family can gain peace of mind that your windows are keeping your home secure and warm.

Aluminium windows: Successfully able to replicate timeless timber window systems or more contemporary style windows, most commonly seen in modern buildings or offices, our Customade aluminium window profiles compliment both contemporary and traditional applications. Conserving warmth and energy effectively, this in turn reduces heat loss considerably via innovative polyamide thermal break technology. With energy efficiency firmly ingrained within their design, our Alitherm 600 aluminium windows are building regulation compliant; ideal for heritage applications. In contrast to our Alitherm 300 window system, which is more suitable for modern and new build applications.

Our Alitherm 300 window system is able to achieve a Window Energy ‘A’ rating, whereas the Alitherm 600 system can achieve a healthy ‘B’ rating. Combined with some of the lowest U-values possible, our Customade aluminium windows are able to accommodate both double and triple glazing comfortably.
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If you’re thinking about replacing the windows in your home, one of the first things you’ll need to do is to identify what kind of windows are currently in your house.

Material: Identify the type of material used in the window frames it’s usually quite easy to identify the material used, simply by examining the interior and exterior of the frame and feeling the frame itself. If you are struggling to identify the material, you can try to locate the name of the manufacturer somewhere on your windows. A quick internet search of the manufacturer may help identify the material you have. If you are really unsure of the material you have, you could ask one of our experts when you enquire with us and we will do our best to help.

Glazing: The majority of homes in England today have double glazed windows. When looking at the glass, if you see two panes separated by a spacer bar then you have double glazing. Spacer bars are small pieces of plastic or metal that work to separate and support the two (or three) panes of glass in a multi-glazed window. If it’s just a single pane, you have single glazed windows. If there are three panes separated by two spacer bars, then you have triple-glazed windows.

Opening: Identifying how your windows open is another important point to recognise. The most common types of opening include side hung and top hung. The difference lies in where the hinges sit. Side hung windows open outward with hinges on the right and left of their frame. Top hung windows swing open using hinges at the top of the window frame. Simply opening your windows will help identify which mechanism they use. There are a few other types of window openings, so if you would like help identifying your type then please let us know when you enquire.

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Casement windows typically open outward with side-mounted hinges, similar to a door. This design is especially popular in many modern homes.

Sliding sash windows operate by sliding vertically. Traditional versions use a system where the sash is balanced by counterweights made of steel, cast iron, or lead, concealed within a hollow box frame. In contrast, modern sliding windows use a spring-loaded mechanism called a spiral balance to counterbalance the sash. This innovation eliminates the need for weight pockets, making them suitable for smaller openings and allowing for larger window sizes with more glass area. This style is especially well-suited to older or period properties, as it reflects the Victorian and Georgian era’s architectural design.

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No, you do not need planning permission to replace existing windows or doors. However, if your property is in a conservation area, there may be restrictions on the designs or materials you can use, so it’s important to check with your local council. If you are planning to build an extension, planning permission will be required.

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We take great pride in providing top-level security for your home, ensuring complete peace of mind. With a wide range of security upgrades available to meet the highest standards, you can trust us to keep your home safe and secure. Contact us to learn more about our window security options.
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Double glazed windows are made with two panes of glass positioned closely together, instead of just a single pane. One pane is on the outside, while the other is securely placed on the inside.

The small gap between them is often filled with argon gas, which helps reduce heat transfer. Argon is highly effective as a thermal barrier because its density limits molecular movement, resulting in significantly less heat loss. This design greatly enhances the energy efficiency of homes.
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The energy efficiency rating for windows follows a scale from A to G, similar to the labels you might see on appliances like fridges, washing machines, and cookers. An ‘A’ rating signifies excellent energy efficiency, while a ‘G’ rating is the lowest. Windows with lower ratings typically do not meet building regulations. We’re proud to say that all of our windows, regardless of their material or style, meet or exceed the recommended energy efficiency standards.

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We offer uPVC windows in any RAL colour, ranging from modern Anthracite Grey to timeless Cream. Additionally, we provide versatile dual-colour uPVC windows, allowing the interior colour to differ from the exterior. This is ideal for homeowners looking to match their new windows and doors with their existing décor.

Popular uPVC colour choices include Chartwell Green, Irish Oak, Cream, and Anthracite Grey.
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Certass and FENSA are independent certification bodies established to ensure that window and door installation companies comply with the latest building regulations. FENSA was founded in 2002, while Certass followed in 2006. Both organisations aim to professionalise installers, improve window and door replacements across the UK, and protect homeowners. Certass and FENSA certificates offer the same level of protection and remain valid for the lifetime of the windows. At Seal Lite, we provide full Certass protection on all new window installations. A new certificate is required whenever windows are replaced.
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Why Choose Seal-Lite?

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Made in Britain

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10 Year Guarantee

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30 Years Experience

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No Pressure Sales

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Quality Products

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Aftercare Service

Excellent Aftercare Service and On-Site Service Engineer for Complete Peace of Mind

Always striving to look after our customers wherever possible, we are extremely proud of the high standards of craftsmanship, fabrication, installation and aftercare services that our highly skilled team continue to excel at delivering.
Our excellent aftersales service and on-site service engineer proactively deal with any issues that occasionally occur with our products directly – no job is too small for our service engineer.
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Visit Our Showroom

It’s important for homeowners and businesses alike to actually see the quality of our products up close. So, why not visit our showroom in Clevedon and see the products for yourself.
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New Build Projects

With an outstanding range of uPVC and aluminium products supplied directly to our trade customers, we are highly experienced in working alongside architects and contractors on new build projects.
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Trade Supply Windows

As well as serving the local community, we have many established connections with various different trade customers across the South West who value the high-quality products that we produce.

Factory & Showroom in Clevedon

We understand how important it is to homeowners and businesses alike, to actually see the quality of the products up close. So, why not drop into the Seal-Lite showroom? Come in and see the products for yourself.

Factory & Showroom in Clevedon

We understand how important it is to homeowners and businesses alike, to actually see the quality of the products up close. So, why not drop into the Seal-Lite showroom? Come in and see the products for yourself.