{"id":4454,"date":"2025-10-14T10:02:43","date_gmt":"2025-10-14T10:02:43","guid":{"rendered":"https:\/\/www.dotcomblinds.com\/blog\/?p=4454"},"modified":"2025-10-07T14:50:11","modified_gmt":"2025-10-07T14:50:11","slug":"how-to-drill-a-metal-lintel-when-installing-blinds","status":"publish","type":"post","link":"https:\/\/www.dotcomblinds.com\/blog\/how-to-drill-a-metal-lintel-when-installing-blinds\/","title":{"rendered":"How To Drill A Metal Lintel When Installing Blinds"},"content":{"rendered":"

We know that installing blinds into a window recess is usually straightforward, but sometimes you hit a hidden obstacle: the steel or concrete lintel. It can be frustrating when your drill suddenly stops, sparks fly, or the bit simply won\u2019t go any further. Don\u2019t worry \u2014 this isn\u2019t a sign you\u2019re doing something wrong, it just means you\u2019ve hit a crucial part of your home\u2019s structure.<\/p>\n

The lintel is a strong beam that sits above your window, designed to support the weight of the wall above the opening. It\u2019s there for an important reason \u2014 to make sure your window frame doesn\u2019t bear unnecessary pressure and your wall remains structurally sound.<\/p>\n

But here\u2019s the good news: a lintel is strong, not impenetrable. With the right tools, technique, and a steady approach, you can safely drill through it to install your blind brackets securely. Here\u2019s exactly how to do it.<\/p>\n

Identifying the Lintel (The Warning Signs)<\/h2>\n

Before you power through a stubborn section of wall, it\u2019s worth pausing to identify what you\u2019re actually drilling into. Recognising the tell-tale signs of a metal lintel will save your drill bits \u2014 and your patience.<\/p>\n

When drilling into a recess, the material you encounter will give clear clues through sound, feel, and appearance. Here\u2019s how to tell what\u2019s going on behind the plaster:<\/p>\n

\"Identifying<\/p>\n

These early warning signs are invaluable. The sooner you identify a lintel, the less likely you are to cause damage to your tools or wall. Once you\u2019ve confirmed you\u2019re dealing with a metal lintel, it\u2019s time to move on to the correct technique and equipment for the job.<\/p>\n

Essential Toolkit & Preparation<\/h2>\n

If you\u2019ve confirmed you\u2019re facing a metal lintel, the first thing to understand is that standard masonry tools won\u2019t work<\/strong>. Masonry bits and hammer settings are designed for brick and concrete \u2014 not solid steel. To get a clean, controlled result, you\u2019ll need to swap your setup for tools built to cut through metal.<\/p>\n

Below is a full checklist of what you\u2019ll need and why each item matters:<\/p>\n

Tools Checklist<\/strong><\/h3>\n

Safety Gear:<\/strong><\/p>\n

Always start with safety. Wear eye protection (goggles)<\/strong> to shield yourself from fine metal shavings and dust created during drilling.<\/p>\n

The Drill:<\/strong><\/p>\n

Use a powerful corded drill<\/strong> or a high-torque cordless model<\/strong> capable of maintaining consistent rotation and pressure.
Crucial Note:<\/strong> Turn off the hammer function. Drilling through steel requires a smooth, steady spin \u2014 not the rapid percussion used for masonry.<\/p>\n

The Drill Bit:<\/strong><\/p>\n

Choose High-Speed Steel (HSS)<\/strong> or Cobalt Drill Bits<\/strong>.<\/p>\n

Explanation:<\/strong> Masonry bits are designed to chip away at softer materials like brick or plaster, but they\u2019ll simply skid and overheat on steel. HSS and Cobalt bits, on the other hand, are engineered to cut through hard metals cleanly and efficiently<\/strong>, making them essential for this job.<\/p>\n

Lubricant:<\/strong><\/p>\n

Apply a small amount of cutting oil<\/strong> or even a few drops of water<\/strong> to the bit during drilling. This helps keep the temperature down \u2014 overheating is the number one reason why drill bits fail when tackling steel lintels.<\/p>\n

Preparation Aids:<\/strong><\/p>\n

Have a pencil<\/strong>, spirit level<\/strong>, and measuring tape<\/strong> ready to mark your drilling points accurately.
A Centre Punch<\/strong> (optional, but highly recommended) can help you make a small indentation before you start drilling \u2014 this keeps the bit steady and prevents it from skidding across the metal surface.<\/p>\n

Step-by-Step Lintel Drilling Technique<\/h2>\n

Drilling through a metal lintel is less about strength and more about patience and control<\/strong>. The key is to take your time, maintain a steady hand, and let the drill bit do the work. Follow these steps carefully to achieve a clean, safe hole without damaging your tools or wall.<\/p>\n

Step 1: Mark and Punch<\/strong><\/h3>\n

\"Mark<\/p>\n

Marking:<\/strong><\/p>\n

Hold your blind bracket in position and mark the exact centre<\/strong> of each screw hole with a pencil. Accuracy here makes all the difference when it comes to alignment.<\/p>\n

Prevent Slippage:<\/strong><\/p>\n

Place a small piece of masking tape<\/strong> over the marked spot. This simple trick gives the drill bit extra grip and prevents it from \u201cwalking\u201d or slipping off the mark when you start drilling.<\/p>\n

Use a Centre Punch (Recommended):<\/strong><\/p>\n

Using a hammer and a centre punch<\/strong>, make a small, shallow indentation in the metal where you plan to drill. This provides a perfect starting point for the bit, guiding it precisely where it needs to go.<\/p>\n

Step 2: Start with a Pilot Hole<\/strong><\/h3>\n

\"Start<\/p>\n

Never start with the full screw size (for example, 6mm). Instead, begin with a smaller pilot hole<\/strong> using a 3mm HSS bit<\/strong>. This requires less torque, keeps the drill steady, and helps prevent overheating.<\/p>\n

Technique:<\/strong><\/p>\n

Set your drill to the lowest speed setting<\/strong>. High speeds cause unnecessary heat build-up, which can instantly dull the bit. Slow and steady rotation ensures a cleaner, longer-lasting cut.<\/p>\n

Step 3: Drill Slowly and Cool<\/strong><\/h3>\n

\"Drill<\/p>\n

Apply Pressure:<\/strong><\/p>\n

Use firm, constant upward pressure into the lintel. You\u2019re cutting through the metal<\/strong>, not smashing it, so avoid any jerky movements or hammer action.<\/p>\n

Lubricate:<\/strong><\/p>\n

Stop every 10\u201315 seconds<\/strong> to add a drop of cutting oil or water<\/strong> to the bit and hole. This prevents overheating \u2014 if you see smoke or steam, stop immediately and allow the bit to cool before continuing.<\/p>\n

Be Patient:<\/strong><\/p>\n

Drilling through steel takes time. Keep steady pressure, low speed, and proper cooling until the bit finally breaks through the metal. It might take longer than you expect, but patience here guarantees success.<\/p>\n

Step 4: Final Size and Fix<\/strong><\/h3>\n

\"Final<\/p>\n

Once the pilot hole<\/strong> is complete, switch to your final drill bit size<\/strong> (the one that matches your wall plug or screw).<\/p>\n

Drill through the hole again, using the same slow speed<\/strong> and regular lubrication technique<\/strong>, until you reach the full diameter.<\/p>\n

Finally, insert your wall plug<\/strong> and fix your blind bracket securely<\/strong>. You now have a strong, clean anchor point \u2014 and a blind that\u2019s properly mounted to last.<\/p>\n

Troubleshooting & Alternatives (Pro Tips)<\/h2>\n

Even with the right tools and technique, some metal lintels can be incredibly tough to penetrate. If you\u2019ve tried everything and still can\u2019t get through, don\u2019t worry \u2014 there are reliable workarounds that can help you finish the job neatly and safely.<\/p>\n

Pro Tip 1: Can You Go Above It?<\/strong><\/h3>\n

Before drilling, take a close look at the depth of the lintel<\/strong>. In most homes, the steel section is only a few millimetres thick and sits directly above the window opening.<\/p>\n

If your bracket design allows<\/strong>, try moving your marking points 10\u201315mm higher<\/strong>. This small adjustment can make all the difference, letting you drill into the softer brickwork or plaster<\/strong> just above the lintel instead of the metal itself. Always double-check alignment to make sure your blind still sits level and functions correctly.<\/p>\n

Pro Tip 2: Alternative Fixings<\/strong><\/h3>\n

If the lintel proves truly unyielding, you can often still fit your blinds securely by changing your mounting method<\/strong>.<\/p>\n