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Home > DIY How To Projects and Tutorial Guides > Drilling into Lintels – A DIY Guide to Fixing and Drilling into Steel Lintels with Advice on Fixing and Drilling into Concrete Lintels

Drilling into Lintels – A DIY Guide to Fixing and Drilling into Steel Lintels with Advice on Fixing and Drilling into Concrete Lintels

A DIY guide to drilling into lintels including fixing to and drilling Steel Lintels and advice on fixing and drilling into Concrete Lintels. How to avoid problems drilling and fixing into concrete or steel lintels. If you need to fix a blind or curtain rail into a window recess this will probably involve drilling into concrete lintels or drilling into steel lintels. This can be a tricky job as both are tough. In this guide we will also show you a method of fixing that avoids the need for drilling into concrete or steel lintels.

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Drilling into Concrete Lintels

Drilling into concrete or steel lintels and also fixing into concrete and steel lintels has presented problems for years to DIY enthusiasts and professional alike.

For concrete lintels the answer is to start your fixing holes with the smallest masonry drill bit you can get, normally 3mm, and work up to the size you require. The smaller the drill bit the easier it will go through concrete

If you hit steel reinforcing in the concrete lintel however, there is no choice but to move the fixing hole or follow the instructions and diagrams below.

In respect to this, if you have a few spare pounds it’s well worth investing in a specialist drill bit set, purpose made for this job as it is now possible to buy drill bits that will go through both concrete and steel – check them out in our store here. These particular drill bits are SDS bits, which will require an SDS drill for you to use them.

Due to how tough lintels can be it is recommeneded that you only use an SDS drill and drill bits.

Speedhammer power bit set

Irwin Speedhammer bit set for concrete and steel

When drilling any holes it is also important that you hold your drill straight so that the hole you drill is also straight. You don’t want to drill any holes at an angle as when you insert your fixing or screw in any screws these will also go in at an angle!

Fixing to Concrete Lintels

With your hole drilled to the correct size for the wall plug or fixing you have chosen (some fixings can be used without the need for a wall plug), position the holes in your lintel and the item you are fixing over each other and insert your screw or fixing.

Screw the screw in using an electric screwdriver or cordless drill/driver (make sure you are using the correct settings on the drill e.g. set to screwdriver as opposed to drill, hammer action is turned off and the torque settings are correct) and you’re done!

Drilling into Steel Lintels

Steel lintels are even more difficult to fix to as, once you have drilled through the plaster and reached the steel lintel, you must then swap drill bits for a high speed steel bit and then use self tapping screws to fix the item you wish to hang.

This is a very difficult process not least because once you have drilled the hole for the self tapping screw, you then have to locate it again to put the screw into it.

Considering there is always at least 20mm between the surface of the plaster or plasterboard to the lintel, this is no mean feat.

If you decide that drilling is the best option to use other than the one outlined below then ensure that you have a decent drill to hand, a range of different sized drills bits and also ensure that they are sharp.

Trying to drill something as hard as steel and concrete with a blunt drill bit will take a lifetime and also put a large amount of un-needed pressure on the drill itself.

As mentioned above, always ensure that you hold your drill straight.

Fixing to Steel Lintels

When you get to the fixing part of the job and inserting a screw make sure that you have a decent electric screwdriver or cordless drill/driver as cutting the screw into the steel can be a tough job.

Also ensure that you have a decent drill bit that fits the screw head tightly and also a decent bit holder to ensure the bit does not slip and become wedged in the bit holder (check out our review on drill bit holders for more info).

With your hold drilled in both the lintel and also the item you are fixing to the lintel (if needed) position the two with the holes aligned and pop your screw in and screw it up.

Ensure that you have the driver set to the correct torque setting and it is set to screwdriver and not drill and screw it up tight. Take your time and don’t drive it in too fast to ensure that you don’t damage anything.

Other Options for Fixing to Steel and Concrete Lintels

A much easier option which will always give you a good fix is to glue a section of timber to the head (soffit) of the window opening and fix to that. The construction adhesives available these days are wonderful and as strong as any mechanical fixing.

Always read the manufacturers instructions as some construction adhesives recommend the surfaces to be glued together should be damped down slightly first.

In the example we have given here the client chose to have a timber glued the full width and depth of the soffit. At which point it could have been filled with wood filler and decorators caulk and painted. You could just fix a narrower timber up to the soffit and fill and paint it.

8 inch x 1 inch timber to be fixed at top of window recess

8 inch x 1 inch timber to be fixed at top of window recess

A piece of planed square edged (PSE) timber was cut to length and a heavy weight construction adhesive applied to the back. Plenty of adhesive is used.

The timber is pushed up into place "wiggled" about to make sure the adhesive spreads between the soffit and the back of the timber and then the timber is pulled down again. This is to make sure no air is trapped in the adhesive to spoil the adhesion.

The timber is then pushed back up and pinned into position with props made from 2 x 2 inch sawn timber with an off cut of the 8 x 1 inch timber cut down and fixed across the top.

Construction adhesive added to rear of timber ready for fixing

Construction adhesive added to rear of timber ready for fixing

Once the adhesive had set (24hours) the props were removed and at this point we would ordinarily have filled any gaps or nicks in the timber and primed, undercoated and glossed the wood to match the room.

On this job however the client wanted the soffit to match the window frame itself rather than the plaster opening so we fixed a length of PVCu facia board "Cappit" in position over the timber.

Cappit is one name for the section of plastic used to cover facia boards when the property is being made "maintenance free" The gutters are then re fixed to the facia covering.

Timber pinned in position in window recess

Timber pinned in position in window recess

Finished timber fixed in position in window recess

Finished timber fixed in position in window recess

Plastic cappit

Plastic cappit

Cappit fixed in position and held in place with supports

Cappit fixed in position and held in place with supports

The cappit is glued up to the timber and the same procedure is used to hold the cappit in place for 24 hours. When completely set the soffit is ready to fix to.

Using pilot holes (see our related projects, right) normal screws can be driven up through the plastic and into the timber for a solid reliable fix for any kind of window blind, curtain poles or curtains.

Completed job with cappit fixed into place in window recess

Completed job with cappit fixed into place in window recess

All project content written and produced by Mike Edwards, founder of DIY Doctor and industry expert in building technology.

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Related Projects That May Help You:
  • Fixing to Lath and Plaster Correctly – How to Secure Fittings to Internal Walls That are Not Plasterboarded
  • Fixing to Lightweight Blocks – How to Fix to Thermalite, Durox and Aircrete Blocks
  • Fixing to Ceramic Tiles – How to Drill Through Ceramic Tiles and Choose the Right Fixing for Tiled Masonry, Plasterboard or Sheet Timber Walls to Ensure a Secure Fix
  • Fixings – The Complete Guide to All the Different Types of Fixings
  • Using Acrow Props With Strongboy Brackets or Timber Needles to Support a Load Bearing Wall or Structure
  • Types of Drills, Drill/Drivers and Hammer Drills – Learn About all the Different Types of Drills and Drivers and Their Features
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