Professional Cat Flap & Dog Flap Installation in Double Glazing
Looking to install a cat flap in a double glazed door or window? We are expert cat flap fitters with years of experience fitting cat and dog flaps into glass, including double glazing, single glazed doors, UPVC panels, and more.
As trusted Cat Flap Fitters Cardiff cat flap installers, we supply and fit new cat flaps and dog flaps in a variety of surfaces, including single glazed doors. Whether you're replacing an existing flap or installing one for the first time, we guarantee a clean, secure, and professional finish.

FAQs: Cat Flap Installation in a Double Glazed Unit, Window or Door
Question: How long does it take to install a cat flap in a single or double glazed door, and what’s the process?
Answer:
Our cat flap installation process is precise and hassle-free. Here’s what you can expect:
- Initial Site Visit & Glass Measurement
We’ll arrange a visit to your home or property at a convenient time. During the visit, we’ll take exact measurements of your current glass panel and assess any patterned or obscure glass types. If your glass style is discontinued, we’ll suggest a suitable alternative. - Glass Cutting & Cat Flap Preparation
We custom-cut two new panels of 4mm float glass—either plain or with your chosen pattern. We then cut a hole in both layers to fit the specific cat flap or dog flap model you’ve selected. These glass panels are then sent for toughening to meet safety standards. - Glass Toughening & Turnaround Time
Your toughened cat flap glass is typically ready for collection within 3–5 working days, depending on the glass supplier’s schedule. - Sealed Double Glazed Unit Creation/Manufactruing
Once toughened, the glass is sealed into a double glazed unit with the hole precisely positioned for the flap. - Installation Appointment
We’ll return at a time that suits you to install the new double glazed unit in place of the old one. - Final Cat Flap Installation
The cat flap (or dog flap) is securely installed on-site into the pre-prepared glass unit. Your pet can start using it immediately!

Why Choose Us for Cat Flap Installation?
- Specialists in cat flaps for double glazing
- Fast turnaround: 3–5 day glass processing
- Supply and fit options available
- Trusted across Cat Flap Fitters Cardiff and surrounding areas
- Friendly, qualified installers with years of experience
If you’re searching for “cat flap fitters near me” or need a quote for installing a cat flap in a single glazed or double glazed door, get in touch today.
Question
Can you install the cat flap in my existing double glazed unit?
Answer: No - The glass in the door should already be toughened and you can not cut toughened glass, so we will need to replace the unit (worth hanging on to the double glazed unit we take ut as should you move or need to put this back at a later date will save you some money).
Question
I already have toughened glass in my door can you install the new catflap in that?
Answer: Im afraid not as the glass is already toughened when you try to cut it, the glass breaks in to hundreds and thousands of prices.
Question
Can I buy any cat flap/catflap?
Answer: No - The cat flap/catflap must be glass fitting and circular as it is very expensive to cut a square hole, although not impossible.
Question
Do You supply cat flaps/catflaps?
Answer: Yes - as cat flaps come in different sizes, models, automatic etc is is best to talk to us first in order that you can ask all the questions you require answered on the most popular brands. We offer a selection of cat flaps and pet doors, we highly recommend that you take a brief look at the option prior to making a decision. We have added a link from our site to some of the most popular brands.
Cat Flaps in Wooden Doors - Cat Flaps in UPVc Panels - Dog Flaps