catflapfittersouthlondon.co.ukCatflap Fitter South London

Merton Cat Flap In Double Glazing

Cat Flap Fitting Services in SW20 Merton South London and surrounding area's

We specialise in professional cat flap installations for a wide range of surfaces, including:

 Cat flaps installation in glass  upvc-door-panels-for-catflaps Glass door cat flap installation

Over 30 Years of Industry Experience

Call Us: 0208 098 2021
Email Us: sales@catflapfittersouthlondon.co.uk

Why Choose Us for Your Cat Flap or Dog Flap Installation?

  • Trusted Experts: Over 30 years of experience in the glass and glazing industry, with 15 years focused on pet door installations.
  • Wide Range of Surfaces: We fit flaps in UPVC, wood, composite, metal, and double-glazed units (including patio and French doors).
  • High-Quality Materials: Replacement UPVC panels are reinforced for durability. Double-glazed units are manufactured in-house for precision and quality.
  • Affordable Pricing: We keep costs low and pass the savings directly to you.
  • Experienced Team: With 6 trusted fitters installing over 200 cat and dog flaps monthly, you’re in safe hands.
  • Customer Satisfaction: Don’t just take our word for it—read our glowing reviews!

Popular Cat and Dog Flaps We Install

We’re experienced in installing a variety of flaps, including:

How We Work: Cat Flap Installation in Double Glazing

If you need a cat flap in a double-glazed unit, we’ll replace the glass with a new custom-made double-glazed unit. This process takes 3–5 working days from measurement to fitting. All units are manufactured at our factory to ensure the highest standards.

Contact us today 0208 098 2021 to discuss your requirements or to get a free, no-obligation quote!

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