North London Cat Flap In Double Glazing

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 Catflap Fitter North London 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.

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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:

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. Installation Appointment
    We’ll return at a time that suits you to install the new double glazed unit in place of the old one.
  6. 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 Catflap Fitter North London 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

Reliable & professional fitters

Reliable & professional fitters

Fitting a cat flap or dog flap requires specialist tools and expertise. All our North London cat flap fitters are fully qualified and trained in the latest tools, equipment and installation techniques as part of our comprehensive services.


Get a free quotation immediately over the telephone or via WhatsApp

What information do you need to accurately quote?

By providing a photo of the glass we can give you the exact price. If you are unable to provide a photo of the glass, then kindly provide some rough dimensions for the example measure edge of glass from left to right and top to bottom, this should give us enough information to provide you with an accurate price which we will confirm once on site and measure 100%.

Installation process

What our customers say

Sure flap video

Discover how to program your cat's microchip into the SureFlap Microchip Cat Flap. Have some tasty treats on hand for your cat to make the process easier and follow the steps in this easy-to-follow video.

One of the most popular cat flaps 

With SureFlap microchip cat flaps being one of the most popular brands to buy today, we are delighted to be a recommended supplier and fitter for your ease of use. Most people will employ a company like ours if you are installing a cat flap into glass, double glazing, or a metal door.

The microchip cat flaps allow only your cat(s) into your property and will restrict unwanted visitors from neighboring homes.

Recommended Sure Flap Cat flap fitters in North London are reachable on 0207 096 3749.

Watch video
Sure flap video

Frequently asked questions

Cat flaps come with a kit that includes a paper template that guides you exactly where to drill. With the help of markings, drill a hole in to each corner of the template. Once you have done with drilling the holes, you can get the shape of your cat flap accordingly. These are great for wooden, UPVC/plastic and metal doors, but would recommend a professionaal for anything to do with glass.

Yes - as cat flaps come in different sizes, models, automatic etc. it 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 options prior to making a decision. We have added a link from our site to some of the most popular brands.

We're afraid not as the glass is already toughened when you try to cut it and the glass would break into hundreds of thousands of pieces!

  1. We would arrange to visit your home or property at a convenient time to get an exact measurement of the current double glazed unit in the door, check what pattern you have and offer a like for like or an alternative if the glass is no longer manufactured.
  2. We would then cut 2 new pieces of 4mm float glass (plain or pattern of your choice) to the exact size as measured, cut a hole in both pieces of glass for the cat flap and then have the glass toughened. (What is toughened glass).
  3. Approximately 2-3 day later the cat flap glass will be ready to collect from the toughening plant.
  4. We will then create a sealed doubel glazed unit which will have the hole perfectly placed for the installation of the cat flap.
  5. We will then arrange a convenient time with you to replace your current double glazed unit with the new cat flap ready double glazed sealed unit.
  6. The cat flap is installed once at the property

By providing a photo of the glass we can give you the exact price. If you are unable to provide a photo of the glass, then kindly provide some rough dimensions. Please measure from edge of glass to edge of glass you can see left to right and top to bottom.

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