Type 4 stainless steel wall ties for cavity wall construction. Available in 200mm, 225mm, 250mm and 275mm lengths. Sold in boxes of 250. Suitable for standard and wider cavity widths in residential and commercial masonry work.
Size
Price
QTY
275mm
£53.90£64.68
200mm
£16.95£20.34
225mm
£16.95£20.34
250mm
£28.50£34.20
Stainless steel wall ties are a core fixing in cavity wall construction, connecting the inner and outer masonry leaves to create a structurally sound and weather-resistant wall. These Type 4 wall ties are manufactured from stainless steel, giving them long-term resistance to corrosion in the damp environment that sits inside a cavity wall. They are available in four lengths: 200mm, 225mm, 250mm and 275mm, making them suitable for a range of cavity widths from standard to wider-cavity insulated builds.
Type 4 wall ties are the most commonly specified tie for general masonry cavity wall construction in the UK. They meet the requirements for use in moderate and severe exposure zones, which covers the vast majority of domestic and commercial projects. The butterfly or double-triangle profile typical of Type 4 ties provides reliable load transfer between leaves while allowing water drip-off, so moisture does not bridge the cavity and reach the inner skin.
Choosing the Right Length of Stainless Steel Wall Tie
Getting the tie length right matters. A wall tie needs to embed a minimum of 50mm into each masonry leaf, with at least 25mm of clear space between the end of the tie and the face of the mortar bed. On a standard 100mm block inner leaf and 102mm brick outer leaf with a 100mm cavity, a 250mm tie is typically the correct choice. Tighter cavities or partial-fill insulation boards can shift that requirement, so always check your cavity width and insulation thickness before ordering. The four lengths available here cover the most common cavity configurations you will encounter on site.
Why Stainless Steel Matters Here
Wall ties live in one of the more unforgiving environments in a building: permanently enclosed, often damp, subject to temperature cycling, and impossible to inspect or replace without significant remedial work. Mild steel ties corrode, expand as they rust, and can crack the mortar bed or spall the masonry face over time. Stainless steel ties do not have that problem. They are the standard specification for new build work and for replacement tie projects where corroded original ties are being drilled and resin-fixed.
Each box contains 250 ties, which is a practical quantity for a working bricklaying gang. At the standard tie spacing of 900mm horizontally and every 450mm vertically, a box of 250 stainless steel wall ties will cover a meaningful run of walling without leaving you short mid-lift. The box quantity also makes it straightforward to order by the number of boxes per house type if you are working to a bill of quantities.
These ties are appropriate for use in new-build cavity wall construction, extensions, and retaining wall leaf connections where the specification calls for a Type 4 stainless steel wall tie.
Pro Tip: Always install wall ties with a slight downward slope toward the outer leaf so any moisture that tracks along the tie drains away from the inner skin rather than bridging the cavity.
Type 4 stainless steel wall ties are used in the construction of cavity walls in residential housing, commercial buildings, and extensions. They tie together the inner blockwork leaf and the outer brick or stone leaf across a range of cavity widths. They are also widely used in remedial tie replacement projects where original galvanised or mild steel ties have corroded and need replacing without rebuilding the wall.
Best For
New-build cavity wall construction
Extensions and outbuildings
Standard and wider cavity widths
Moderate and severe exposure zones
Remedial wall tie replacement
Compatible With
Brick outer leaf
Concrete block inner leaf
Dense and lightweight blockwork
Partial-fill cavity insulation boards
Standard mortar bed joints
Key Specifications
Type 4 wall tie profile
Material: stainless steel
Available lengths: 200mm, 225mm, 250mm, 275mm
Box quantity: 250
Suitable for standard and wide cavity construction
Not suitable for: Not suitable for use as a replacement for specialist remedial resin-fixed ties where the existing masonry leaf cannot accept a standard mortar-bed installation. Not intended for timber frame or steel frame construction where proprietary frame ties are required.
Wall ties should be laid into the mortar bed as each course is laid, with a minimum embedment of 50mm into each masonry leaf. Position ties so they slope slightly downward toward the outer leaf. Maintain a clear air gap of at least 25mm between the tie end and the cavity face of the mortar bed.
Space ties at no more than 900mm horizontally and every 450mm vertically. Increase tie density around window and door openings and at the edges of panels as required by your specification. Do not allow mortar droppings to accumulate on ties during construction, as this can bridge the cavity.
Select the correct tie length for your cavity width, accounting for insulation board thickness if partial-fill is being used
Lay the outer mortar bed to the correct course height before placing the tie
Press the tie into the mortar bed of the outer leaf with a minimum 50mm embedment
Ensure the tie slopes slightly down toward the outer leaf to encourage moisture drainage
Continue laying the inner leaf mortar bed and press the tie into it with a minimum 50mm embedment on the inner side
Check that at least 25mm of clear air gap remains between each tie end and the cavity face of the mortar joint
Space ties at maximum 900mm horizontal centres and 450mm vertical centres, with additional ties at openings and panel edges as specified
Which length wall tie do I need for a standard cavity wall?
For a typical new-build cavity wall with a 100mm block inner leaf, 100mm cavity, and 102mm brick outer leaf, a 250mm tie is usually correct. For wider cavities with full-fill insulation, a 275mm tie may be needed. Always check your cavity width and insulation thickness before ordering.
Are these wall ties suitable for replacing corroded ties in an existing wall?
These are standard bed-joint ties designed for installation during construction. For remedial tie replacement in existing walls, you would typically use a specialist helical resin-fixed tie rather than a Type 4 bed-joint tie. These are not suited to drilling and resin-fixing into existing masonry.
How many wall ties do I need per square metre?
At the standard spacing of 900mm horizontally and 450mm vertically, you need approximately 2.5 ties per square metre of wall. A box of 250 ties will therefore cover around 100 square metres of walling at standard spacing, before accounting for any additional ties required at openings.
These Type 4 wall ties are manufactured from stainless steel, providing long-term corrosion resistance in the damp enclosed environment of a masonry cavity wall. Type 4 is the standard tie specification for general masonry cavity wall construction under BS EN 845-1, suitable for moderate and severe exposure classifications. The tie profile allows load transfer between masonry leaves while the design promotes moisture drip-off to prevent cavity bridging.
Type
Type 4
Material
Stainless steel
Available lengths
200mm, 225mm, 250mm, 275mm
Box quantity
250
Standard
BS EN 845-1
Application
Masonry cavity wall construction
Size
225mm, 200mm, 250mm, 275mm
Box Quantity
250
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