catflapfittersouthlondon.co.ukCatflap Fitter South London

South London Cat Flap Patio Door

Expert Cat Flap Installation for Double-Glazed Patio Doors and Side Panels in South London

At Cat Flaps South London, we specialise in supplying and fitting high-quality cat flaps for double-glazed patio doors and side panels. Whether you need a new cat flap or a replacement unit, our professional installation process ensures safety, durability, and convenience.

cat1

How We Install Cat Flaps in Double-Glazed Patio Doors

Step 1: On-Site Measurement
We arrange a convenient time to visit your property and take precise measurements of your current glass patio door. This ensures the new unit fits perfectly.

Step 2: Custom Glass Preparation
We cut two new pieces of 4mm float glass, available in plain or patterned designs, to match your current door. A circular hole is precision-cut for the cat flap, and the glass is toughened for safety.

Step 3: Toughening Process
The glass is sent to a specialised toughening plant. This process takes approximately 2-3 days to ensure the glass is compliant with safety standards.

Step 4: Double-Glazed Unit Creation
The toughened glass is crafted into a sealed double-glazed unit, featuring the perfectly positioned hole for the cat flap installation.

Step 5: Final Installation
We coordinate a time to replace your existing glass with the new double-glazed unit. Once installed, the cat flap is securely fitted on-site.

Frequently Asked Questions

Q: Can you install a cat flap in my existing double-glazed patio door?
A: Unfortunately, no. Double-glazed units in patio doors are typically made with toughened or laminated safety glass, which cannot be cut without shattering. A replacement unit is required. We recommend storing the old unit for potential future use to save costs.

Q: I already have toughened glass in my patio door. Can you cut it to install a cat flap?
A: No, cutting toughened glass is not possible as it will shatter into small fragments. A new custom glass unit will be needed.

Q: Can I use any cat flap for my patio door?
A: No, the cat flap must be designed specifically for glass installations and should be circular. While square holes are possible, they are significantly more expensive to cut.

Q: Do you supply cat flaps?
A: Yes, we offer a wide selection of cat flaps, including manual, automatic, and microchip-operated models. We recommend consulting with us to choose the right cat flap for your needs. Visit our site for links to trusted cat flap brands.

Why Choose Us for Your Cat Flap Installation in South London?

  • Expertise in working with double-glazed doors and double glazed windows.
  • Safe and professional installation process.
  • Custom-made glass tailored to your patio door.
  • Wide range of cat flap options to suit your needs.
  • We supply and fit cat and dog flaps
  • We are local cat flap fitters for your area
  • We offer a  choice of glass patterns if required to choose from

Contact us today to schedule a consultation or to learn more about our services!

Cat Flaps in Wooden Doors - Cat Flaps in UPVc Panels - Cat Flaps in Glass & Double Glazing - Dog Flaps

How to train your cat or dog to use their new pet flap

Some cats will approach a cat flap with curiosity, while others may be a bit more wary. Here is five easy steps to help get your cat using its new cat flap.

Cold every time you have to get up and let the cat in or out - woken in the middle of the night - sound familiar, then its possibly time you fitted a cat flap/dog flap!

Click for step by step proven guide
How to train your cat or dog to use their new pet flap

What our customers say

Choosing the right pet flap for your Pet

Choosing the right pet flap for your Pet

There are a variety of pet flaps available. Our most popular brands include Catmate, Staywelland Sureflap, available in the following types:

4 WAY PET FLAP
2 WAY PET FLAP
Infra-Red Collar Pet Flap
Magnetic Collar Pet Flap
RFID MICROCHIP PET FLAP

See more on the cat flap fitter page

Frequently asked questions

Cat flap fitter near me | Professional cat flap installation | Cat flap fitting services | Cat flap installation expert | Local cat flap fitter | Cat door installer | Cat flap fitting specialist | Cat flap installation company | Hire cat flap fitter | Cat flap fitting services near me | Cat flap installation cost | Best cat flap fitter | Cat flap fitting for doors | Install cat flap in door | Cat flap fitting and repair | Custom cat flap fitting | Pet door installation services | Cat flap fitting for windows | Cat flap installation

No - The cat flap/catflap must be glass fitting and circular as it is very expensive to cut a square hole, although not impossible.

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.

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).

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.

It varies, but usually takes around 1 hour to install a cat flap in wood, UPVC, metal or a composite door, if it is a cat flap in glass or a double glazed unit, the glass will be toughened safety glass and usually take 3-5 working days to remanufacture and about 30 minuites to install again subject to type and style of door or frame.

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

Just be prepared to be a bit more patient with older cats who may not have used a cat flap before. Use a food reward for your cat and try playing in close by so they get used to being nect to it. Leave the flap open so they can see outside as curiosity will entice them closer until they eventually go through it. 

Areas we cover

4 way cat flap   Cat flap fitters   Cat Flap In Double Glazing   Cat Flap In UPVC Door   Cat Flap in Wooden Door   Cat flap patio door   Cat flap single glass door   Dog flaps   Double glazed door   Gallery   Get in touch   Glass patterns   How to link a Microchip Sure Flap   How to train a cat to use a cat flap   Microchip Sure Flaps   Pet flap installation   Suppliers of cat flaps   Toughened safety glass
Services   Cat Flap Fitter   Cat Flap Installation   Cat Flap Fitting   Catflap Fitter   Cat Flap   Need a cat flap fitted   Cat Flap In Double Glazing   Cat Flap in wooden Door   Cat Flap in UPVC panel   Cat Flap in Glass   cat flap fitters   Catflap   Dog Flaps
Postcodes   SE23   SE6   W7   W1M   SW16   SE3   DA4   SW13   TW18   SW7   SE5   DA2   SW1A   TW1   TW5   BR6   SE20   SE21   BR2   TW20   SE13   DA1   W10   TW9   SE28   TW4   DA10   TW19   DA6   W5   DA14   SW15   W9   SE12   W12   SE26   TW8   BR3   SW10   TW10   TW7   DA8   W1   DA9   BR4   SW19   DA16   DA15   TW12   SE1   SW12   SE15   BR7   DA11   SW6   SW20   SE11   W4   SW1   SE9   SE27   SE14   SE10   SE2   SE7   TW17   SE24   SW14   DA17   DA13   DA12   SE16   SW11   SE17   SE18   BR8   W3   SE22   SW5   DA3   TW11   SW2   TW3   SW18   SE4   SW9   SE8   TW16   SW17   SE25   TW15   SW3   TW14   W11   SW8   TW13   BR1   DA5   W8   BR5   W6   W13   SE19   W2   SW4   W14
Towns   Betsham   Vauxhall   Hayes   Shorne Ridgeway   Soho   Park Lane   Belgravia   Coldblow   Marylebone   Waterloo   Loughborough Junction   Gunnersbury   Richmond Park   Stanwell Moor   Hounslow   Darenth   Richmond   Harvel   Vauxhall   Bushy Park   Crofton Park   Luddesdown   Nunhead   South Ealing   Grove Park   Ealing Broadway   Green Street Green   Chelsea   Culverstone Green   Hanwell   Englefield Green   Warwick Park   Westway   Brixton   Lambeth   White City   New Ash Green   Deptford High Street   Raynes Park   Eynsford   Leaves Green   Sidcup   Cobham   Warwick Avenue   Well Hall   Osterley Park   London Bridge   Regent Street   Ashford   West Wickham   Hatton   Clapham Common   Deptford   St Mary Cray   North Kensington   Gravesend   Sole Street   Sloane Square   Ranger's House   Cheyne Walk   Queensway   Chiswick   Queen's Gate   Wandsworth Town   Old Kent Road   Streatham Common   West Brompton   Crystal Palace   Fulham Palace Road   South Bank   Lesnes Abbey   Egham   Knightsbridge   New Eltham   Hammersmith & Fulham   Southwark   Vigo Village   West Hill   Newington   Ham   Borough   Bexleyheath   Drayton Green   North Cray   Cromwell Road   Catford   Green Street Green   Northfleet   Horniman Museum   Edgware Road   Sunbury   Kew Gardens   South Acton   Wandsworth Road   Kensington   Acton Green   Hammersmith   Bushey Mead   East Wickham   Southwark Cathedral   Camberwell   Merton   Syon House   Maida Hill   Tooting Bec   Wimbledon Common   St Paul's Cray   Keston   East Putney   Cooper's Hill   Singlewell or Ifield   Tooting Broadway   New Cross Gate   Down House   Hyde Park   West Ealing   West Kensington   East Dulwich   Shorne   Clapham South   Wimbledon   Cranford   West Acton   Avery Hill   Chelsea   Peckham Rye   Southfleet   Hextable   Anerley   Summerstown   Shooter's Hill   Crystal Palace   Lee Green   Perry Street   Streatham   Ladywell   Greenwich   Heston   Locksbottom   Pimlico   Bean   Bayswater   Brook Green   Southwark   Lower Sydenham   Bellingham   Stockwell   Kensal Town   Bromley   Oxford Circus   Tulse Hill   Hounslow   Brentford   Clapham   High Street Kensington   Holland Park   Great Portland Street   South Darenth   Dulwich   Barnes   Chislehurst   Sands End   Herne Hill   Clapham Junction   Blackheath Park   Gipsy Hill   Westbourne Grove   Oxford Street   Western Avenue   Chiswick High Road   Goldhawk Road   South Norwood   Camer   Marble Arch   Denmark Hill   Belvedere   Westminster   Clapham North   Colliers Wood   Slade Green   Barnes Bridge   North Dulwich   Mayfair   Bedford Park   Pratt's Bottom   Roehampton   Rotherhithe   Westbourne Park   Penge   Norwood Junction   Brompton Road   Putney   Laleham   Fulham   Notting Hill   Lewisham   Putney Bridge   Eden Park   Docklands   Westminster Bridge   Orpington   Peckham   East Dulwich   North Ealing   Stanwell   Kensington & Chelsea   Balham   Crockenhill   St John's   Ladbroke Grove   Honor Oak Park   Riverside   Tooting Graveney   Streatham Hill   Erith Marshes   Maida Vale   Ladbroke Grove   Walworth   Farnborough   Latimer Road   Boston Manor   Shepperton   Chiswick Park   Bedford Park   Westbourne Green   Bayswater Road   Wilmington   Mortlake   Rocks Lane   Wimbledon Park   Mottingham   Barons Court   Lancaster Gate   Brompton   Stone   Bermondsey   Bond Street   Norwood   Kidbrooke   Gloucester Road   South Wimbledon   Sydenham Hill   Marble Hill   Hounslow Central   Bromley Common   Putney Heath   Lewisham   Lane End   South Lambeth   Bostall Woods   Littleton   St James's Park   Fulham Palace Road   Hyde Park   Northfields   Ealing   Canary Wharf   Sutton at Hone   Horseferry Road   Haydons Road   Elthorne Park   Hither Green   Hanworth   Tulse Hill   Osterley   Putney Vale   Elephant & Castle   Wraysbury   South Kensington   Cromwell Road   Kennington   Ealing Common   Holland Park   Queens Road   Bickley   Royal Oak   Knockholt Station   Longfield   Woodside   Earlsfield   Ravenscourt Park   Boston Manor   Kingston upon Thames   New Cross   Stockwell   Isleworth   Warren Street   Crayford   Acton   Great West Road   Earl's Court   Chislehurst Caves   Furzedown   Brompton   Uxbridge Road   Well Hill   Lavender Hill   Olympia   Beckenham   Acton Town   Tottenham Court Road   Upper Norwood   South Street   Battersea   Sydenham   Horton Kirby   Woolwich   Vauxhall Bridge   Brockley   City of Westminster   Buckingham Palace   Notting Hill Gate   Greenhithe   Hampton   Oval   Chalk   Chelsfield   Forest Hill   Upper Sydenham   Erith   Meopham   Green Park   Teddington   Hanger Lane   Norbury   Istead Rise   Feltham   Surrey Quays   Hythe End   Lambeth   Farningham   Blackheath   Western Avenue   East Bedfont   Grove Park   West Dulwich   Hyde Park Corner   Upper Halliford   Wandsworth   Meopham Green   Goodge Street   Piccadilly Circus   Hounslow West   Hawley   Staines   Longfield Hill   Wandsworth Common   East Sheen   Thorpe   Ham House   Honor Oak   Downe   Upper Tooting   Welling   Ladywell   Goldhawk Road   New Barn   Ealing   Lambeth North   Thamesmead   Thong   Dartford   Eltham   Hartley   Shooter's Hill   East Acton   Thamesmead   Plumstead   Bexley   New Kent Road   West Norwood   Hammersmith   Bermondsey   Charlton   Kennington   Merton   Fulham Broadway   Chelsea Embankment   Fawkham Green   Copse Hill   Swanley   Coldharbour Lane   Paddington   Hounslow East   Foots Cray   Nine Elms   Swanscombe   Marylebone   Victoria   Lee   Westminster Abbey   Rye Lane   Elmers End   Lambeth   West Kilburn   Deptford   Turnham Green   Kew   Paddington   Castlenau   Stamford Brook   Richmond upon Thames   Abbey Wood   Hook Green   Parsons Green   Chiswick House   Kensington Gore   Southfields   West Heath   Cottenham Park   Twickenham   Shepherds Bush
Counties   Kent   Berkshire   Surrey   Greater London
© 2026 catflapfittersouthlondon.co.uk
Chat on WhatsApp