{"id":3241,"date":"2025-10-27T13:35:04","date_gmt":"2025-10-27T18:35:04","guid":{"rendered":"https:\/\/www.woodworkerexpress.com\/blog\/?p=3241"},"modified":"2025-11-18T12:49:47","modified_gmt":"2025-11-18T18:49:47","slug":"what-are-shims","status":"publish","type":"post","link":"https:\/\/woodworkerexpress.com\/blog\/2025\/10\/what-are-shims\/","title":{"rendered":"What Are Shims?: A Comprehensive Guide"},"content":{"rendered":"\n<p><a href=\"https:\/\/www.woodworkerexpress.com\/wood-shims\/\" target=\"_blank\" rel=\"noreferrer noopener\">Shims<\/a> are small but essential tools that make big projects possible. Whether you\u2019re hanging cabinets, leveling doors, or aligning machinery, shims provide the precision that separates a clean installation from a crooked one.<\/p>\n\n\n\n<p>At their core, shims are thin, wedge-shaped or flat pieces used to fill gaps, level surfaces, plumb objects, or align components. They deliver fine adjustments where measurements fall short or materials shift, saving time and preventing rework.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.woodworkerexpress.com\/wood-shims\/\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/woodworkerexpress.com\/wp-content\/uploads\/2025\/10\/what-are-shims-1024x683.png\" alt=\"What Are Shims?: A Comprehensive Guide\" class=\"wp-image-3254\" srcset=\"https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/what-are-shims-1024x683.png 1024w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/what-are-shims-300x200.png 300w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/what-are-shims-768x512.png 768w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/what-are-shims.png 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">What Are Shims Used For?<\/h2>\n\n\n\n<p>Shims solve one simple problem: <strong>unevenness<\/strong>. They compensate for irregular surfaces, structural settling, and imperfect materials. Common applications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cabinet Installation:<\/strong> Leveling base cabinets on uneven floors before fastening.<\/li>\n\n\n\n<li><strong>Door Hanging:<\/strong> Ensuring even spacing around the jamb for smooth swing and closure.<\/li>\n\n\n\n<li><strong>Flooring and Trim:<\/strong> Aligning moldings and baseboards against walls and floors.<\/li>\n\n\n\n<li><strong>Appliance Installation:<\/strong> Leveling washers, dryers, and dishwashers to prevent vibration.<\/li>\n\n\n\n<li><strong>Furniture Repair:<\/strong> Stabilizing wobbly tables or shelving units.<\/li>\n\n\n\n<li><strong>Machinery Setup:<\/strong> Aligning equipment in manufacturing environments for accurate operation.<\/li>\n<\/ul>\n\n\n\n<p>In short, anywhere there\u2019s a gap, slope, or misalignment, a shim brings things back to level.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.woodworkerexpress.com\/12-beddarwood-shims.html\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"900\" src=\"https:\/\/woodworkerexpress.com\/wp-content\/uploads\/2025\/10\/12-Inch-Contractor-Bundle-.2.jpg\" alt=\"Contractor-Grade Shims\" class=\"wp-image-3249\" srcset=\"https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/12-Inch-Contractor-Bundle-.2.jpg 900w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/12-Inch-Contractor-Bundle-.2-300x300.jpg 300w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/12-Inch-Contractor-Bundle-.2-150x150.jpg 150w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/12-Inch-Contractor-Bundle-.2-768x768.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Types of Shims<\/h2>\n\n\n\n<p>Shims come in different materials and designs depending on the application. The right choice ensures stability and durability.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Type<\/strong><\/th><th><strong>Best Use<\/strong><\/th><th><strong>Key Benefits<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>Wood Shims<\/strong><\/td><td>Framing, doors, and light carpentry<\/td><td>Easy to cut, shape, and tap into place<\/td><\/tr><tr><td><strong>Composite Shims<\/strong><\/td><td>Kitchens, bathrooms, and damp environments<\/td><td>Moisture-resistant and rot-proof<\/td><\/tr><tr><td><strong>Plastic Shims<\/strong><\/td><td>Heavy-duty installations and outdoor use<\/td><td>Won\u2019t compress or degrade over time<\/td><\/tr><tr><td><strong>Metal Shims<\/strong><\/td><td>Machinery and precision equipment<\/td><td>High strength, exact thickness options<\/td><\/tr><tr><td><strong>Stackable \/ Adjustable Shims<\/strong><\/td><td>Repeated or adjustable setups<\/td><td>Quick, tool-free leveling<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>For most home and cabinet installations, <strong><a href=\"https:\/\/www.woodworkerexpress.com\/wood-shims\/\" target=\"_blank\" rel=\"noreferrer noopener\">composite and hardwood shims<\/a><\/strong> strike the best balance of strength, stability, and workability.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.woodworkerexpress.com\/shims-pine-120-pack.html\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"900\" src=\"https:\/\/woodworkerexpress.com\/wp-content\/uploads\/2025\/10\/NGP8-120.2.jpg\" alt=\"Pine Wood Shims\" class=\"wp-image-3247\" srcset=\"https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGP8-120.2.jpg 900w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGP8-120.2-300x300.jpg 300w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGP8-120.2-150x150.jpg 150w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGP8-120.2-768x768.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">How to Use Shims<\/h2>\n\n\n\n<p>Using shims is simple once you know where to start.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Identify the Low or Uneven Spot:<\/strong> Use a level or straightedge to find where gaps appear.<\/li>\n\n\n\n<li><strong>Insert the Shim:<\/strong> Slide or tap the shim into place until the surface is level or plumb.<\/li>\n\n\n\n<li><strong>Secure the Position:<\/strong> Once aligned, trim any excess and fasten your materials together.<\/li>\n\n\n\n<li><strong>Double-Check Level:<\/strong> Always recheck after fastening\u2014tightening screws can shift alignment slightly.<\/li>\n<\/ol>\n\n\n\n<p><strong>Pro Tip:<\/strong> Work in pairs\u2014place one shim in front and another behind the object for even support.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Common Shim Materials and When to Use Them<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Wood:<\/strong> Ideal for quick carpentry fixes. Avoid in damp or outdoor conditions.<\/li>\n\n\n\n<li><strong>Composite:<\/strong> Perfect for kitchens, bathrooms, and under-sink applications. Won\u2019t swell or rot.<\/li>\n\n\n\n<li><strong>Plastic:<\/strong> Great for heavy loads and long-term outdoor use.<\/li>\n\n\n\n<li><strong>Metal:<\/strong> For precise industrial alignment or machinery setup.<\/li>\n<\/ul>\n\n\n\n<p>For most woodworking or cabinetry tasks, <strong><a href=\"https:\/\/www.woodworkerexpress.com\/shims-composite-32-pack.html\" target=\"_blank\" rel=\"noreferrer noopener\">composite shims<\/a><\/strong> provide reliable, moisture-resistant performance.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.woodworkerexpress.com\/shims-composite-32-pack.html\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"900\" src=\"https:\/\/woodworkerexpress.com\/wp-content\/uploads\/2025\/10\/NGCP8-32L.1.jpg\" alt=\"Composite Shims\" class=\"wp-image-3244\" srcset=\"https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGCP8-32L.1.jpg 900w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGCP8-32L.1-300x300.jpg 300w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGCP8-32L.1-150x150.jpg 150w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGCP8-32L.1-768x768.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Why Shims Matter<\/h2>\n\n\n\n<p>Skipping shims can lead to uneven doors, cracked countertops, noisy appliances, and gaps that ruin a clean install. Proper shimming:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Keeps doors and drawers square<\/li>\n\n\n\n<li>Ensures appliances fit smoothly<\/li>\n\n\n\n<li>Prevents countertop lippage<\/li>\n\n\n\n<li>Reduces vibration and noise<\/li>\n\n\n\n<li>Extends the life of your installation<\/li>\n<\/ul>\n\n\n\n<p>A few cents\u2019 worth of shims can save hundreds in callbacks and rework.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.woodworkerexpress.com\/8-wood-and-composite-shims-84-box-nelson-wood-shims-csh8-84-12-20b.html\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"900\" src=\"https:\/\/woodworkerexpress.com\/wp-content\/uploads\/2025\/10\/NGC8-84B.2.jpg\" alt=\"Beddar Wood Shims\" class=\"wp-image-3253\" srcset=\"https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGC8-84B.2.jpg 900w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGC8-84B.2-300x300.jpg 300w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGC8-84B.2-150x150.jpg 150w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/NGC8-84B.2-768x768.jpg 768w\" sizes=\"auto, (max-width: 900px) 100vw, 900px\" \/><\/a><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading has-medium-font-size\">Final Thoughts: What Are Shims?<\/h2>\n\n\n\n<p>Shims may be small, but their role in creating straight, stable, and long-lasting installations is huge. From framing to finishing, they make alignment easy and reliable.<\/p>\n\n\n\n<p>For durable, contractor-grade options, shop <strong><a href=\"https:\/\/www.woodworkerexpress.com\/wood-shims\/\" target=\"_blank\" rel=\"noreferrer noopener\">composite, hardwood, and stackable shims<\/a><\/strong> at <a href=\"https:\/\/www.woodworkerexpress.com\/wood-shims\/\" target=\"_blank\" rel=\"noreferrer noopener\">WoodworkerExpress.com<\/a>. Keep a pack on hand\u2014you\u2019ll use them more often than you think.<\/p>\n\n\n\n<p><strong>Next Up > <a href=\"https:\/\/woodworkerexpress.com\/2025\/10\/how-to-shim-cabinets\/\">How to Shim Cabinets<\/a><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.woodworkerexpress.com\/wood-shims\/\" target=\"_blank\" rel=\" noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/woodworkerexpress.com\/wp-content\/uploads\/2025\/10\/wwe-cta-banner-1024x683.png\" alt=\"WWE CTA Banner\" class=\"wp-image-3245\" srcset=\"https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/wwe-cta-banner-1024x683.png 1024w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/wwe-cta-banner-300x200.png 300w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/wwe-cta-banner-768x512.png 768w, https:\/\/woodworkerexpress.com\/blog\/wp-content\/uploads\/2025\/10\/wwe-cta-banner.png 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Shims are small but essential tools that make big projects possible. Whether you\u2019re hanging cabinets,&hellip;<\/p>\n","protected":false},"author":131,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,26,47],"tags":[],"class_list":["post-3241","post","type-post","status-publish","format-standard","hentry","category-cabinets","category-product-spotlights","category-woodworking"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.9.5.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"Shims are small but essential tools that make big projects possible. Whether you\u2019re hanging cabinets, leveling doors, or aligning machinery, shims provide the precision that separates a clean installation from a crooked one. At their core, shims are thin, wedge-shaped or flat pieces used to fill gaps, level surfaces, plumb objects, or align components. 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