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Concrete Screws
Concrete screws fix timber and hardware straight into concrete, brick, stone and block without plugs, for post holders, ledger boards, battens and frames. We stock a 7.5 mm TX30 flat countersunk concrete screw in 80 mm and 120 mm lengths, packed in 100s, with an exterior plating for outdoor use. It drives into a pilot hole and replaces nylon plugs and hammer fixings. Stocked in our warehouse and delivered across Ireland.
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Concrete Screws for Outdoor Timber in Ireland
Whenever timber meets masonry, you need a fixing that grips the wall as well as the wood. A concrete screw does that in one piece. It drives straight into concrete, brick, stone or block through the timber you are fixing, so there are no nylon plugs to line up and no hammer fixings to knock home. That makes it quick for fixing ledger boards and battens to a wall, bolting down post holders, and fitting window and door frames.
Concrete screw sizes
Both screws are 7.5 mm in diameter with a flat countersunk head that sits flush with the timber, and both come in packs of 100. Pick the length by how thick the piece you are fixing is. The 80 mm screw suits thinner timbers, battens and brackets fixed tight to the wall. The 120 mm screw is for thicker ledgers and frames, where more of the screw has to pass through the timber before it reaches the masonry.
The serrated, high-low thread cuts its own path into all masonry types, and the TX30 Torx recess stops the bit camming out, so the screws drive cleanly with less wear on your driver bits.
Built for outdoor work
An exterior plating protects each screw and resists 500 hours of salt spray testing, so it copes with Irish weather on garden walls, patios and outbuildings. Choose it for fixings that stay exposed to the rain, such as post holders on a patio or battens on a garden wall.
Where concrete screws fit in
These screws are the link between your timber and the ground or wall it stands on. They pair naturally with our cast iron post holders, which bolt down onto a slab or patio, and with concrete post bases and post connectors for a complete pergola.
For fixing timber to timber, such as decking boards to joists, use stainless steel screws instead. You will find them with our decking accessories.
Using concrete screws
Drill first and each screw holds tight first time. Hold the timber in place and drill a pilot hole through it into the masonry, then drive the screw with a TX30 bit until the countersunk head sits flush with the timber.
See the rest of our outdoor timber hardware for everything that goes with your posts and frames.
Frequently Asked Questions About Concrete Screws
What are the concrete screws for?
They fix directly into concrete, brick, stone, block and wood, replacing nylon plugs and hammer fixings. Use them to bolt down post holders, fix ledgers and battens to a wall, or fit window and door frames. They are 7.5 mm in 80 mm or 120 mm lengths, packed in 100s.
What bit do the concrete screws need?
A TX30 Torx bit. The TX recess reduces driver wear and stops the bit camming out, so the screw drives cleanly until the countersunk head sits flush.
Can I use concrete screws outdoors?
Yes. They have an exterior plating that resists 500 hours of salt spray testing, so they suit fixings on garden walls, patios and outbuildings exposed to Irish weather.
What screws should I use for outdoor wood?
For timber to masonry, use these concrete screws. For timber to timber outdoors, stainless steel, A2 or A4, is the safe choice and the only choice for oak and cedar, whose tannins stain galvanised and mild steel. See the stainless steel decking screws in our decking accessories.
What is a double countersunk screw?
It has a two stage countersunk head, which reduces the chance of the head shearing off and helps it sit flush as it countersinks. Our stainless steel decking screws have this head with ribs underneath, which makes them a good match for timber decks.