Remedial Wall Ties and Crack Stitching Bars

Helical Remedial Wall Ties

Helical Remedial Wall Ties are an essential element for the stability of a cavity wall structure. An effective brick tie system transfers static and live loads across the cavity, enabling load-sharing by both inner and outer walls. Typically, cavity wall ties are bedded in a mortar bed joint as a building is constructed.

Cavity Wall Tie failure can be a consequence of a construction defect, for example they have been fitted incorrectly, or even omitted completely. Wall Ties may even have suffered corrosion over time, thereby compromising their load-sharing capabilities.

Thor Helical Remedial CD Wall Tie are the fastest fixing wall tie in the market. The unique fixing tool is cost effective and easy to use (sold separately).

The Helical MultiPlug Tie Can be used with Newton CDM 

• Fixes into CDM MultiPlugs for tying in block or brick internal walls
• Can also be used for fixing insulation within the cavity drain

Helix Spiroties - Wall Ties and Crack Stitching Bars - Manufactured from austenitic stainless steel (type 304)

Wall ties and crack stitching bars are an essential element for the stability of a cavity wall structure, tying its weather protecting brick facade to the main body of a building. An effective brick tie system transfers static and live loads across the cavity, enabling load-sharing by both inner and outer walls. Typically cavity wall ties are bedded in a mortar bed joint as a building is constructed.

Cavity tie failure can be a consequence of a construction defect; for example where the original ‘built-in’ cavity wall ties have been omitted, incorrectly fixed or fitted with brick ties that are too short. Alternatively failure may be a result of a buildings aging process, whereby wall tie corrosion may have compromised the walls load-sharing capability.

Over time mortar joints, which host the wall ties, undergo a chemical change through carbonation. The mortar becomes aggressive to the base steel and its protective coatings, reducing the life expectancy of cavity tie systems to as little as 26 years.

The design life of the building is typically much longer than this period and it therefore follows that at some point a remedial retrofit replacement of the brick ties may be necessary if the stability and load sharing capacity of the wall is to be maintained.

.