Butterfly Wall Ties – Stainless Steel 200mm / 250mm

Stainless steel butterfly wall ties are the standard mechanical connector for masonry cavity wall construction, linking the inner and outer leaves while keeping moisture where it belongs. Each tie features a central twist that acts as a drip point, stopping water from tracking across the cavity to the inner leaf. These ties are available in 200mm for 75mm cavities and 250mm for 100mm cavities, covering the two most common widths on domestic and light commercial builds. Pack of 250 per box.

The butterfly shape gives these ties their name. The flat tails at each end bed into the mortar joints on both leaves, while the twisted section sits vertically in the cavity. The tails provide solid embedment at a minimum of 50mm each side, giving you proper mechanical anchorage without the tie sitting tight against either leaf. The design has been in use on masonry construction for decades because, frankly, it does the job without complication.

Stainless steel construction means no corrosion over the life of the building, no rust staining bleeding through your facing brickwork, and no concern about the alkaline environment of fresh mortar degrading the ties over time. The grade used here also handles coastal and exposed locations without additional protection or special treatment. Once they are bedded in, they are done.

Where Stainless Steel Butterfly Wall Ties Get Used

These ties suit standard new-build cavity wall construction in brick and block. The 200mm length is the right choice for 75mm cavities, and the 250mm length works with 100mm cavities. Both sizes are used across domestic housing, extensions, and light commercial masonry work wherever a standard cavity wall is being built to current construction practice.

Coverage and Spacing

Building regulations set the baseline spacing at 900mm horizontal centres and 450mm vertical centres, with tighter spacing required around openings, at corners, and in exposed locations. At standard spacing, a pack of 250 ties will cover approximately 50 to 60 square metres of wall area, depending on your opening count. It is worth doing a quick calculation before ordering rather than finding yourself a handful of ties short on the last course of a Friday afternoon pour. Coverage will reduce if your wall has a high proportion of openings or if you are working to closer tie spacing in an exposed zone.

The pack size of 250 is practical for a meaningful run of walling without constant reordering, and buying by the box keeps your unit cost sensible on larger jobs. For projects with multiple wall types or varying cavity widths, it is straightforward to order both sizes and use them as required across the build.

Stainless steel butterfly wall ties at this specification are a long-established solution for cavity wall construction. Correct embedment, correct orientation, and correct spacing are all that is needed to meet the standard and build a wall that will perform for the life of the structure.