BBA approved stainless steel cavity screw ties for connecting new brickwork to existing walls. Quick to install with no special tools needed. Supplied in boxes of 100 with plugs and insulation retaining clips included.
Size
QTY
Price
QTY
50-75mm cavity
100
£143.90£172.68
100mm cavity
10
£19.50£23.40
100mm cavity
100
£152.90£183.48
120mm cavity
100
£159.90£191.88
130mm cavity
100
£171.90£206.28
140mm cavity
100
£187.90£225.48
160mm cavity
100
£209.90£251.88
180mm cavity
100
£239.00£286.80
190mm cavity
100
£249.00£298.80
200mm cavity
100
£265.00£318.00
230mm cavity
100
£269.00£322.80
240mm cavity
100
£279.00£334.80
260mm cavity
100
£289.00£346.80
280mm cavity
100
£345.00£414.00
Bluebird cavity screw ties offer a straightforward solution for forming new brick, block or stone leaves against existing single-skin walls. Made from austenitic stainless steel, these ties resist corrosion in exposed and cavity wall conditions, making them suitable for both internal and external applications. The screw-in design means no resin or specialist equipment is required just drill, plug, and drive the tie home.
Why tradespeople choose Bluebird screw ties
These ties have earned their reputation on site because they actually speed up the job. Drill a 45mm hole into the existing masonry, tap in the supplied plug, and screw the tie fully home. The tie can then be bent up or down to align with the mortar bed of your new work. Five ties per square metre gives you the structural connection you need without the fuss of mixing adhesives or waiting for cure times.
The BBA approval matters here. It means the product has been independently tested and certified for structural use in cavity wall construction. When building control asks questions, you have got the paperwork to back up your work. That peace of mind is worth having, especially on jobs where the specification is being watched closely.
Versatility across cavity widths
Bluebird manufacture these ties in a wide range of sizes to suit cavities from 50mm right up to 280mm. Each size has a corresponding overall length, so you get the correct embedment depth into both the existing wall and the new leaf. Whether you are tying in a standard house extension or dealing with a wider cavity on a commercial project, there is a size that fits.
The kit includes insulation retaining clips, which hold cavity insulation in place against the inner leaf. This saves you sourcing separate clips and keeps the cavity clear for the brickwork. Small details like this add up to a tidier job and less time spent hunting for bits.
Stainless steel construction means these ties will outlast the building they are holding together. For coastal locations, exposed elevations or anywhere salt and moisture are a concern, stainless is the only sensible choice. The austenitic grade used here provides excellent resistance to pitting and stress corrosion.
Pro Tip: Drill your holes slightly upward into the existing wall so any water tracks away from the tie rather than sitting in the plug.
These cavity screw ties are designed for forming new external or internal leaves against existing single-skin masonry. Common applications include house extensions, garage conversions, infill panels and adding brick cladding to existing block or stone structures. They work equally well on brick, block, stone and timber-framed buildings where a structural tie is needed between old and new work.
Best For
House extensions and additions
Garage and outbuilding conversions
Brick cladding to existing walls
Infill panels between structures
Remedial cavity tie replacement
Compatible Materials
Brick masonry
Concrete block
Natural stone
Timber frame structures
Aircrete block
Key Features
BBA approved for structural use
Austenitic stainless steel construction
No special tools or resins required
Plugs and insulation clips included
Available for cavities 50mm to 280mm
Not suitable for: These ties are not designed for cavity wall insulation retrofit or for use as remedial ties in existing cavity walls where both leaves are already built. For those applications, a dedicated cavity tie replacement system would be more appropriate.
Installation is quick once you get into the rhythm. The existing wall needs to be sound and free from major defects before you start. Work at a rate of five ties per square metre, spacing them evenly across the wall area. Each tie bends to suit the bed joint height of your new brickwork.
Check the existing wall is structurally sound with no major cracks or loose masonry
Mark tie positions at five per square metre with appropriate spacing
Drill into the existing wall to a depth of 45mm using the correct masonry bit
Insert the supplied plastic plug into each hole
Drive the screw tie fully home until the head is tight against the plug
Bend the tie up or down to align with the mortar bed joint of your new work
Build the new leaf in the normal way, bedding each tie into the mortar joint
How many ties do I need per square metre?
The standard installation rate is five ties per square metre. This provides adequate structural connection between the existing wall and the new leaf while meeting building regulations.
Can I use these ties for a timber frame building?
Yes, Bluebird cavity screw ties are suitable for timber frame structures. Ensure the screw penetrates solid timber rather than just sheathing, and check your specific building control requirements for tie spacing on timber frame.
What drill bit size do I need?
Use a masonry drill bit that matches the supplied plug diameter. Drill to a depth of 45mm into the existing wall. The plug and tie combination is designed to work together, so always use the plugs provided in the box.
Manufactured from austenitic stainless steel, these ties offer superior corrosion resistance compared to galvanised alternatives. The BBA certification confirms compliance with Building Regulations for structural wall tie applications. Each tie is designed to provide the required embedment depth for both existing and new masonry leaves.
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