Give your pets the freedom they deserve with our expert cat flap and dog flap installation services, carried out safely, neatly, and professionally across all door and window types. We install pet flaps into uPVC and wooden doors, internal and external panels, single-glazed glass, and custom-made double-glazed units, ensuring a secure, durable, and fully compliant finish every time.
Our experienced installers carefully assess your door or window before work begins, ensuring the correct positioning, size, and fitting for your pet’s comfort and long-term use. For glass installations, we manufacture brand-new sealed glass units with precision-cut openings, preserving insulation, strength, and appearance—existing double glazing is never cut on site, protecting performance and safety.
We handle every step of the process, from supplying the right type of flap—manual, magnetic, microchip, or lockable—to professional installation and final checks. The result is a weather-tight, draught-free, and secure fit that blends seamlessly with your door or window.
Our cat and dog flap installations are suitable for homes, flats, and rental properties, helping maintain security, energy efficiency, and style while giving your pets safe, independent access indoors and outdoors. Whether it’s a small cat flap or a large dog flap, we deliver a tidy, reliable installation you can trust.
Looking to give your furry friends easy access to your house?
Our professional glaziers provide a secure solution by assessing the condition of your door and will expertly cut into the glass or frame to fit a high-quality pet flap. Depending on the condition of the glass and door, we might need to provide you with a new toughened or double glazed unit with a pre-cut hole to ensure the installation meets safety standards.
Professional cat flap installation for homes and apartments, We supply and install manual, magnetic, and microchip cat flaps, ensuring correct positioning, a secure fit, and a draught-free, weatherproof finish while maintaining security, insulation, and compliance with glazing regulations.
Clean and precise installation into uPVC doors or panels, carried out without compromising the door’s structural strength, insulation, or security. We ensure a tight, weatherproof fit that blends seamlessly with the existing door design.
Accurate fitting into solid or hollow door panels, with internal reinforcement where required. This ensures a stable, secure, and long-lasting installation that resists warping, draughts, and everyday use.
Professional installation into most door types, including internal and external doors. We carefully position the flap for your pet’s comfort while maintaining security, weather resistance, and a neat finish.
Expert installation into window glass, including single glazing and double-glazed units. We use purpose-made replacement glass to ensure safety, clarity, and full compliance with glazing regulations—never cutting existing sealed units on site.
We manufacture and install brand-new double-glazed units with a precision-cut opening designed specifically for your cat flap. This preserves thermal insulation, sound reduction, and structural integrity, while meeting all relevant glazing standards.
Safe installation by replacing the existing single-pane glass with toughened safety glass pre-cut to accommodate the cat flap. This provides a secure, durable, and compliant solution with a clean, professional finish.
Replacement of old, damaged, or outdated cat flaps, including upgrades to magnetic or microchip models. Improves security, insulation, and ease of use while maintaining a clean and professional finish.
Installation of microchip-activated cat flaps for secure access, allowing only your pet to enter while keeping unwanted animals out. Suitable for uPVC doors, wooden doors, panels, and purpose-made glass units, fitted neatly and weather-tight.
Make life easier for you and your pet with our professional dog flap installation services. We install dog flaps into uPVC doors, panels, windows, single glazing, and custom-made double-glazed units, ensuring a secure, weatherproof, and long-lasting finish that blends seamlessly with your door or window.
All installations are carried out by trained and experienced experts, with careful positioning for your dog’s comfort and ease of use. For glass installations, we supply purpose-made replacement glass with precision-cut openings, maintaining insulation, strength, and full compliance with glazing standards while keeping your home safe, efficient, and tidy.
Strong and clean installation into uPVC doors or panels, carried out without compromising door stability, insulation, or security. Provides your dog with easy access while maintaining a neat, weatherproof finish.
Precise fitting into solid or hollow door panels, with internal reinforcement where required to safely support larger dog flap sizes. Ensures long-term durability and reliable everyday use.
Professional installation into a wide range of internal and external door types. We ensure correct positioning for your dog’s comfort, delivering a secure, draught-free, and pet-friendly opening.
Specialist installation into glazed window areas using custom-made replacement glass with a purpose-cut opening. This method ensures safety, clarity, and full compliance with glazing regulations.
We manufacture brand-new double-glazed units with a factory-cut aperture designed specifically for the dog flap. This preserves thermal insulation, noise reduction, and structural integrity, while meeting safety standards.
Installation of microchip-activated dog flaps that allow only your pet to enter, keeping other animals out. Suitable for uPVC doors, wooden doors, panels, and purpose-made glass units, fitted securely and weather-tight.
Open 24/7, 365 Days A Year
30-90 Minutes Arrival Time
FAST RESPONSE
No Call-Out Fee
Skilled Local Glaziers
Pet flap installation is an ideal solution to give your pet the freedom to come go out of the house easily.
Our expert team in Glass Express will carefully assess your door and will select the right pet flap meeting your pets’ needs. Using specialized tools, we precisely cut into your UPVC door panel to install the flap making sure the flap fits securely while your door remains weatherproof and energy-efficient.
Wooden doors are the most flexible options for installing pet flaps, wood can be safely cut on-site ensuring a perfect, secure fit that blends perfectly with your home’s aesthetics.
We carefully measure your wooden door and professionally install the best pet flap fitting your pet’s size, while ensuring your door stays airtight and weather-resistant. This could include slid timber doors, panelled wooden doors, garden and side doors, and Victorian doors.
Yes, we can install pet flaps into double glazed glass units. The process depends on the specific condition of your existing door or window. In some cases, if the glass can be safely cut on-site without compromising its integrity, we will do so to install the pet flap directly. However, if the glass cannot be cut on-site—perhaps because it’s an older or more fragile unit—we will take precise measurements of your existing glass and then supply a new double-glazed panel pre-fitted with the pet flap. This approach ensures the integrity, security, and thermal efficiency of your glazing are maintained while providing a clean, professional finish. Our team uses specialized tools and techniques to ensure that the installation is secure, discreet, and long-lasting.
We offer a wide variety of pet flaps to suit different needs, preferences, and security levels. These include simple manual locking flaps, which can be locked and unlocked as needed; magnetic flaps that respond to your pet’s collar magnet for easy access; and advanced automatic or electronic pet flaps that use microchip recognition or RFID technology to permit only authorized pets to pass through. Some models come with multiple locking options, such as push, slide, or electronic lock, giving you control over your pet’s access. We can help you choose the best type of flap based on your pet’s size, your security concerns, and your aesthetic preferences.
The duration of the installation depends on several factors, including the type of pet flap, the material of your door or window, and whether a new double-glazed panel needs to be fabricated. Typically, a standard installation into a door or window frame takes between 1 to 3 hours. If we are installing into existing glass that can be cut on-site, the process is usually quicker. If a new glass panel needs to be ordered and supplied, the wait time for manufacturing and delivery will extend the overall timeline. We always aim to complete installations efficiently while maintaining high standards of quality and safety.
When installed properly by our experienced technicians, a pet flap will not significantly impact your home’s insulation or security. Modern pet flaps are designed with energy efficiency in mind, featuring weatherproof seals and locking mechanisms that prevent drafts and heat loss. Additionally, high-quality locking or electronic flaps provide enhanced security, preventing unauthorized access. Proper installation ensures the flap fits snugly within the aperture, maintaining the integrity of your home’s insulation. We take care to ensure that your pet flap is securely fitted and that any potential vulnerabilities are addressed, giving you peace of mind.
The cost of installing a pet flap varies depending on several factors such as the size and type of the flap, whether new glass panels are required, and the complexity of the installation. Basic manual pet flaps installed into existing doors or panels typically start around £150. More advanced electronic or automatic flaps, especially those installed into double-glazed units, can cost between £200 and £300 or more. If a new double-glazed panel needs to be manufactured, there will be an additional cost for the glass. We recommend scheduling a consultation so we can provide a precise, no-obligation quote based on your specific requirements.
Absolutely! We offer a range of locking options to suit your security needs. Manual locking flaps are simple and reliable, allowing you to lock or unlock the flap as needed. For added convenience and security, automatic or electronic pet flaps are available. These flaps can be programmed to open only for pets wearing a microchip or RFID tag, preventing other animals from entering. Some models include remote control locking, timer settings, or smartphone app integration. We will advise you on the best options for your pet and your home environment to ensure you get a solution that balances ease of use with security.
Yes, pet flaps can be installed into glass panels, including double-glazed units. The installation method depends on your existing glazing. If the glass can be safely cut and re-sealed on-site, we can perform the cut and fit the pet flap directly into your current glass. Alternatively, for safety and durability, we often recommend replacing the existing panel with a new double-glazed unit that has the pet flap already integrated. This ensures a professional finish, maintains your home’s insulation, and preserves security. Our team is skilled in working with glass and will ensure the installation is seamless and secure.
Yes, we are fully equipped to install pet flaps into double glazed units. When the existing double-glazed glass can be safely modified, we can cut a hole and fit the flap in situ. If the existing glazed unit cannot be cut or if you prefer a neater, more secure solution, we can replace the entire panel with a new double-glazed unit that has the pet flap pre-installed. This method ensures minimal disruption to your home’s insulation and security features. We handle all aspects of the process, from measuring and manufacturing to installation, to ensure a perfect fit and long-term performance.
No, if installed correctly by professional installers, a pet flap will not damage or compromise your home’s insulation. Modern pet flaps are designed with weatherproof seals that prevent drafts, moisture ingress, and heat loss. Our team ensures that the flap is fitted tightly and securely, maintaining the insulation properties of your door or window. Proper installation also involves sealing around the edges of the cut or new panel to prevent any thermal bridging or leaks, preserving your home’s energy efficiency.
Yes, we can install larger pet flaps suitable for big dogs. We stock or can source a variety of sizes to accommodate pets of all breeds and sizes, from small cats to large breeds like Labrador Retrievers or German Shepherds. When choosing a flap for a large dog, it’s important to select one with the right dimensions and weight capacity. We will help you select a robust, secure, and appropriately sized flap that provides your pet with easy access without compromising security or insulation.
Absolutely! Pet flaps can be installed into almost any type of door or panel, including uPVC, wooden, or metal doors, as well as into panels or windows. We have experience working with various materials and can customize the installation to suit your specific door or window structure. Whether it’s a front door, back door, or a side panel, we will ensure the flap is fitted securely, aligned correctly, and looks neat.
Yes, we can supply a wide range of pet flaps, from basic models to high-tech electronic units. Alternatively, if you already have a preferred pet flap brand or model, we are happy to install it for you. We will advise on the best options based on your pet’s size, your security needs, and your aesthetic preferences, ensuring you get a product that meets your expectations.
Absolutely. Our professional installers follow industry best practices to ensure that every pet flap is fitted securely and safely. We use high-quality materials, proper sealing techniques, and secure locking mechanisms to prevent any vulnerabilities. Our goal is to provide a seamless, durable installation that maintains the security of your home, prevents drafts or leaks, and provides your pet with easy access. Customer safety and satisfaction are our top priorities, and we guarantee a reliable, long-lasting result.
Get In Touch
Glass Express Ltd provides fast, reliable emergency glazing and boarding-up services across London and the South East. Our local glaziers are available 24/7 for domestic and commercial glazing
Emergency boarding up & making safe
Emergency glazing
Shopfront & commercial glazing
Cat & dog flap installation
Window & door repair
Glass replacement
Double glazing repair
Glass door replacement
We provide 24/7 emergency glazing and boarding up services across Greater London, including:
Central London (Westminster, Camden, Kensington & Chelsea)
North London (Barnet, Enfield, Haringey, Islington)
East London (Hackney, Newham, Barking & Dagenham, Redbridge)
South London (Croydon, Lambeth, Southwark, Bromley)
West London (Ealing, Hounslow, Hillingdon, Harrow)