{"id":35136,"date":"2025-12-28T20:02:52","date_gmt":"2025-12-28T19:02:52","guid":{"rendered":"https:\/\/www.tomsgates.com\/?p=35136"},"modified":"2026-01-06T10:39:04","modified_gmt":"2026-01-06T09:39:04","slug":"how-to-install-a-dog-door-or-cat-flap-in-the-wall","status":"publish","type":"post","link":"https:\/\/www.tomsgates.com\/en\/how-to-install-a-dog-door-or-cat-flap-in-the-wall\/","title":{"rendered":"How to install a dog door or cat flap in the wall"},"content":{"rendered":"<section class=\"l-section wpb_row height_auto\"><div class=\"l-section-h i-cf\"><div class=\"g-cols vc_row via_grid cols_1 laptops-cols_inherit tablets-cols_inherit mobiles-cols_1 valign_top type_default stacking_default\"><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"g-cols wpb_row via_grid cols_1 laptops-cols_inherit tablets-cols_inherit mobiles-cols_1 valign_top type_default stacking_default\" style=\"--columns-gap:3rem;\"><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h6>Tomsgates has been installing dog and cat flaps in doors and walls since 2014. In this article, we show you the steps for installing a dog flap in the wall. And we share useful tips \ud83d\udca1so you can avoid some common mistakes!<\/h6>\n<h6>We show an example installation in a modern brick wall finished with insulation and roughcast. This method also applies to brick facades, panel facades, stacked stone, precast concrete, Trespa, load-bearing walls and more. View the <a href=\"https:\/\/www.tomsgates.com\/en\/realisation\/\" target=\"_blank\" rel=\"noopener\">photos page<\/a> for more installed dog and cat flaps.<\/h6>\n<h6><\/h6>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_huge\"><\/div><div class=\"g-cols wpb_row via_grid cols_2 laptops-cols_inherit tablets-cols_inherit mobiles-cols_1 valign_middle type_default stacking_default\" style=\"--columns-gap:3rem;\"><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>The best spot in the wall for a dog door or cat flap<\/h2>\n<h4>Step 1: Locate pipes in the wall<\/h4>\n<p>Pipes run from top to bottom, so place the cat flap or dog door next to, not under, switches, taps, sockets, etc. Use a detector and stay cautious, as this rule is not always being followed \ud83e\udd74.<\/p>\n<p><em>\ud83d\udca1 A scanner detects electrical cables better when there is power flowing through them. So switch on the light, plug in a vacuum cleaner, etc.<\/em><\/p>\n<h4>Step 2: Mark the interior wall and drill through to the outside<\/h4>\n<p>Use the cardboard installation template provided to mark the centre of the hole; in case of minor shifts, the drilled hole will remain within the area that needs to be broken out. To drill through, use a 40 cm long drill bit or a transpointer.<\/p>\n<p><em>\ud83d\udca1 Take into account that the floor outside may be lower. If the step up to the pet door is too high for your dog or cat, you can make a step using patio tiles, a flower pot or a small beam.<\/em><\/p>\n<\/div><\/div><\/div><\/div><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"w-slider style_none fit_scaledown nav_none count_6\"><div class=\"w-slider-h\" aria-hidden=\"true\"><div class=\"royalSlider\"><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0101-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0101-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0201-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0201-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0202-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0202-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0203-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0203-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0204-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0204-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"982\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0205-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0205-982x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><\/div><img decoding=\"async\" src=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0101-1024x1024.jpg\" width=\"1024\" height=\"1024\" alt loading=\"lazy\"><\/div><div class=\"w-slider-json\" onclick='return {&quot;autoScaleSlider&quot;:true,&quot;addActiveClass&quot;:true,&quot;loop&quot;:true,&quot;fadeInLoadedSlide&quot;:false,&quot;slidesSpacing&quot;:0,&quot;imageScalePadding&quot;:0,&quot;numImagesToPreload&quot;:2,&quot;arrowsNav&quot;:true,&quot;arrowsNavAutoHide&quot;:false,&quot;transitionType&quot;:&quot;move&quot;,&quot;transitionSpeed&quot;:250,&quot;block&quot;:{&quot;moveEffect&quot;:&quot;none&quot;,&quot;speed&quot;:300},&quot;thumbs&quot;:{&quot;fitInViewport&quot;:false,&quot;firstMargin&quot;:false,&quot;spacing&quot;:4},&quot;controlNavigation&quot;:&quot;none&quot;,&quot;fullscreen&quot;:{&quot;enabled&quot;:true},&quot;autoScaleSliderWidth&quot;:1024,&quot;autoScaleSliderHeight&quot;:1024}'><\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_huge\"><\/div><div class=\"g-cols wpb_row via_grid cols_2 laptops-cols_inherit tablets-cols_inherit mobiles-cols_1 valign_middle type_default stacking_default\" style=\"--columns-gap:3rem;\"><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"w-slider style_none fit_scaledown nav_none count_9\"><div class=\"w-slider-h\" aria-hidden=\"true\"><div class=\"royalSlider\"><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0301-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0301-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0302-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0302-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0303-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0303-1024x1024.jpg\"><span data-alt=\"Installer makes a hole in the interior wall to install a cat flap and dog door - Tomsgates cat flap, Tomsgates dog door, High-quality cat flap, Draught-free cat flap, Secure cat flap, Silent cat flap, Wooden cat flap\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0304-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0304-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0305-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0305-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0306-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0306-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0401-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0401-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0402-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0402-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" data-rsBigImg=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0403-scaled.jpg\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0403-1024x1024.jpg\"><span data-alt=\"Installer makes a hole in an exterior wall to install a cat flap - Tomsgates cat flap, Tomsgates dog door, High-quality cat flap, Draught-free cat flap, Secure cat flap, Silent cat flap, Wooden cat flap\"><\/span><\/a><\/div><\/div><img decoding=\"async\" src=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0301-1024x1024.jpg\" width=\"1024\" height=\"1024\" alt loading=\"lazy\"><\/div><div class=\"w-slider-json\" onclick='return {&quot;autoScaleSlider&quot;:true,&quot;addActiveClass&quot;:true,&quot;loop&quot;:true,&quot;fadeInLoadedSlide&quot;:false,&quot;slidesSpacing&quot;:0,&quot;imageScalePadding&quot;:0,&quot;numImagesToPreload&quot;:2,&quot;arrowsNav&quot;:true,&quot;arrowsNavAutoHide&quot;:false,&quot;transitionType&quot;:&quot;move&quot;,&quot;transitionSpeed&quot;:250,&quot;block&quot;:{&quot;moveEffect&quot;:&quot;none&quot;,&quot;speed&quot;:300},&quot;thumbs&quot;:{&quot;fitInViewport&quot;:false,&quot;firstMargin&quot;:false,&quot;spacing&quot;:4},&quot;controlNavigation&quot;:&quot;none&quot;,&quot;fullscreen&quot;:{&quot;enabled&quot;:true},&quot;autoScaleSliderWidth&quot;:1024,&quot;autoScaleSliderHeight&quot;:1024}'><\/div><\/div><\/div><\/div><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Making the hole in the wall<\/h2>\n<h4>Step 3: Making the hole in the interior wall<\/h4>\n<p>Start with the interior wall because if you encounter anything unexpected, the hole can be moved before anything has happened to the exterior fa\u00e7ade.<\/p>\n<p>Work sequence: cut into the plaster or stucco with a multi-tool (do not use a grinding disc!), drill into the corners, remove the stucco to reveal the joints, remove the top row of bricks and chip away the bricks underneath by chiselling the joints.<\/p>\n<p><em>\ud83d\udca1Allow for 1 cm of clearance around the tunnel if the door is secured with PU mounting foam.<\/em><\/p>\n<h4>Step 4: making the hole in the outer wall<\/h4>\n<p>Same sequence of work: grind the exterior fa\u00e7ade, grind, drill corners, remove the top row of bricks and loosen the underlying bricks by chiselling the joints.<\/p>\n<\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_huge\"><\/div><div class=\"g-cols wpb_row via_grid cols_2 laptops-cols_inherit tablets-cols_inherit mobiles-cols_1 valign_middle type_default stacking_default\" style=\"--columns-gap:3rem;\"><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2>Installing the dog flap or cat flap in the wall<\/h2>\n<h4>Step 5: cutting the tunnel to size<\/h4>\n<p>Only once the hole in the wall has been made can you measure the exact thickness of the wall in order to make the tunnel the right length. Follow the instructions on the tunnel panels and on <a href=\"https:\/\/www.tomsgates.com\/en\/installation\/#:~:text=Download%20manual-,Installation%20in%20a%20wall,-download\" target=\"_blank\" rel=\"noopener\">this page<\/a> on the website.<\/p>\n<p><em>\ud83d\udca1You do not need to finely finish the saw cut you make because it will be invisible after<\/em><em>\u00a0installation.<\/em><\/p>\n<h4>Step 6: Install the cat flap or dog flap in the wall and seal it<\/h4>\n<p>Then it&#8217;s time. Slide the door into the wall from the outside and seal it with PU foam, also on the inside wall to prevent draughts from entering from the cavity. Then secure the door with the supplied frame and seal it watertight on the outside with silicone.<\/p>\n<p><em>\ud83d\udca1Apply the silicone sealant very carefully, as the entire wall height above the hatch will drain onto this seal.<\/em><\/p>\n<\/div><\/div><\/div><\/div><div class=\"wpb_column vc_column_container\"><div class=\"vc_column-inner\"><div class=\"w-slider style_none fit_scaledown nav_none count_11\"><div class=\"w-slider-h\" aria-hidden=\"true\"><div class=\"royalSlider\"><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0501-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"576\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0502-1024x576.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0503-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0601-1024x1024.jpg\"><span data-alt=\"Installer fitting a cat flap and dog door in a wall - Tomsgates cat flap, Tomsgates dog door, High-quality cat flap, Draught-free cat flap, Secure cat flap, Silent cat flap, Wooden cat flap\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0603-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0602-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0606-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0604-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0605-1024x1024.jpg\"><span data-alt=\"\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0608-1024x1024.jpg\"><span data-alt=\"Tomsgates installer has installed a black cat flap and dog flap in a wall - Tomsgates cat flap, Tomsgates dog flap, High-quality cat flap, Draught-free cat flap, Secure cat flap, Silent cat flap, Wooden cat flap\"><\/span><\/a><\/div><div class=\"rsContent\"><a class=\"rsImg\" data-rsw=\"1024\" data-rsh=\"1024\" href=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/IMG_1777-1-1-1024x1024.jpeg\"><span data-alt=\"Black cat flap and black dog door installed in a wall - Tomsgates cat flap, Tomsgates dog flap, High-quality cat flap, Draught-free cat flap, Secure cat flap, Silent cat flap, Wooden cat flap\"><\/span><\/a><\/div><\/div><img decoding=\"async\" src=\"https:\/\/www.tomsgates.com\/wp-content\/uploads\/2025\/12\/0501-1024x1024.jpg\" width=\"1024\" height=\"1024\" alt loading=\"lazy\"><\/div><div class=\"w-slider-json\" onclick='return {&quot;autoScaleSlider&quot;:true,&quot;addActiveClass&quot;:true,&quot;loop&quot;:true,&quot;fadeInLoadedSlide&quot;:false,&quot;slidesSpacing&quot;:0,&quot;imageScalePadding&quot;:0,&quot;numImagesToPreload&quot;:2,&quot;arrowsNav&quot;:true,&quot;arrowsNavAutoHide&quot;:false,&quot;transitionType&quot;:&quot;move&quot;,&quot;transitionSpeed&quot;:250,&quot;block&quot;:{&quot;moveEffect&quot;:&quot;none&quot;,&quot;speed&quot;:300},&quot;thumbs&quot;:{&quot;fitInViewport&quot;:false,&quot;firstMargin&quot;:false,&quot;spacing&quot;:4},&quot;controlNavigation&quot;:&quot;none&quot;,&quot;autoScaleSliderWidth&quot;:1024,&quot;autoScaleSliderHeight&quot;:1024}'><\/div><\/div><\/div><\/div><\/div><div class=\"w-separator size_huge\"><\/div><div class=\"wpb_text_column\"><div class=\"wpb_wrapper\"><h2 class=\"p1\">Years of installation experience<\/h2>\n<h6>We have designed our cat flaps and dog doors ourselves to ensure they are draught-free, secure and quiet. But they were also designed to be easy to install, because we install them ourselves. And now you can benefit from this experience, making installation a pleasant project. Please do contact us if you have any questions or tips of your own!<\/h6>\n<h6>Finally, check in advance whether permits or surveys are required. Although this is a small wall penetration, in some circumstances (e.g. a front fa\u00e7ade, an apartment building, etc.) it is still required.<\/h6>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"<p>We have experience with the installation of pet doors since 2013. You are going to make a hole in a door, in a wall or a window, which is quite radical.<\/p>\n","protected":false},"author":35,"featured_media":33656,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-35136","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to install a dog door or cat flap in the wall<\/title>\n<meta name=\"description\" content=\"\u2713Draught-free \u2713Insulated \u2713Safe \u2713Quiet - Discover the Tomsgates black cat doors and dog doors for large and small cats and dogs, for installation in walls - Installation service\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tomsgates.com\/en\/how-to-install-a-dog-door-or-cat-flap-in-the-wall\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to install a dog door or cat flap in the wall\" \/>\n<meta property=\"og:description\" content=\"\u2713Draught-free \u2713Insulated \u2713Safe \u2713Quiet - 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