Remedial Wall Ties Range
Vista offer remedial wall ties to address two common issues; failed cavity walls and poor performing single leaf walls.
Repairing failed cavity walls
Existing cavity walls sometimes fail where wall ties have been omitted or have corroded. Our Mechanical Remedial Ties and Helical Remedial Ties can restore structural integrity to a building by re-tying the inner and outer leaves of a cavity wall.
Mechanical Remedial ties are used for tying and pinning masonry back to brick, block or concrete. They are suitable for domestic dwellings and small commercial buildings up to three storeys (not greater than fifteen metres in height) comprising of brick or blockwork of similar thickness. They are not suitable for timber frame buildings. Pull out strengths range from 1.9Kn to 3.0KN.
Description: These are A2 304 grade M5 bar Neoprene wall ties with brass locking nuts, washers and anti-slip knurled nut. Sizes range from 150mm to 300mm. A Neoprene drip ring prevents water crossing the cavity and can be located as required.
Installation: 11mm holes are drilled through the outer leaf and into the inner leaf (min 70mm) and the tie is pushed into place. For maximum performance Vista suggest using a setting tool to activate the neoprene or brass grips creating a secure mechanical fixing. The outer leaf hole can then be repaired. Full installation instructions available on request.
Mechanical Helical Remedial Wall Ties (HELI-8-TWO)
Mechanical Helical Remedial Ties are used for tying and pinning masonry back to brick, block, concrete or timber.
Description: Double pointed helical wall ties. Mechanically fixed. 8mm diameter x 170, 195, 220, 245, 270mm long. The helical design prevents water crossing the cavity.
Installation: 1. Drill the pilot holes through both leaves to required depth (70mm min embedment) and diameter (5.5 – 6.5mm for 8mm tie). 2. Insert the installation tool into an SDS rotary hammer drill, then place the tie into the installation tool. 3. Drive the tie into the internal leaf to the required depth ensuring the tie is fully recessed to the external leaf below the face of the masonry. 4. Make good the tie at the surface with matching mortar.
Resin to Resin Remedial Wall Ties (HELI-4.5-ONE, HELI-6-ONE)
Resin to Resin Remedial Ties are used for tying and pinning masonry back to brick, block or concrete. Tying both the inner (load bearing) leaf with the external wall.
Description: Single pointed helical wall ties. For use with Polyester Resin. 4.5mm diameter x 195, 220, 245mm long and 6mm diameter x 200, 220, 250, 270mm long. The helical design prevents water crossing the cavity.
Installation: 1. Drill a 10mm pilot hole through the outer leaf and 55mm into the inner leaf. Clear both holes of debris using blowing and brushing. 2. Inject polyester resin into the inner leaf using the nozzle extension. 3. Push through the outer leaf and into the inner leaf. Hand support tool available if required. 4. Inject resin over the tie into the outer leaf. 5. Make good the tie at the surface with matching mortar.
Grout Remedial Wall Ties (HELI-8)
Used to stabilise solid or rubble walls, repair delaminated brickwork and to reconnect separated internal party walls to the external leafs.
Description: Helical wall ties. For use with cementitious grout. 8mm diameter x 150mm through to 1000mm long.
Installation: 1. Drill hole to required depth and clean. Attach required length of nozzle to applicator gun. 2. Fill gun with mixed grout. Pump grout to fill the nozzle, screw correct length helical grout tie into nozzle, insert nozzle to back of hole. 3. Pump the cementitious grout into back of the hole. 4. Withdraw nozzle carefully leaving sufficient grout around the tie until removed. 5. Make good the tie at the surface with matching mortar.
Turning a single leaf wall into a cavity wall
Single leaf walls often suffer from poor thermal performance or damp. Vista Wavy Tail Ties and Cavity Starter Ties can alleviate these issues by creating a cavity wall built off the existing masonry structure.
These products allow the introduction of a cavity tie into a situation where no ties are present.
Description: Stainless Steel ‘wavy’ tail ties used for remedial applications. Available in lengths of 150 – 300mm. Designed for use in conjunction with Vista resins.
Installation: Build the new leaf up until the first wall tie is required. Then drill a 10mm hole in existing masonry, clear it of debris and insert the resin and wavy end tie. Lay the triangular end into new brick-work mortar beds as building proceeds.
The V30 Wavy Tail Tie is available for specification on the NMB Source Platform.
These products allow the introduction of a cavity tie into a situation where no ties are present.
Description: Screw in Stainless Steel ties with cavity drip used for remedial applications. Available in lengths of 180 – 275mm. Supplied with nylon plug.
Installation: Build the new leaf to one brick height below where the first wall tie is required. Then drill an 8mm hole in existing masonry approximately one brick height above the current course. Clear the hole of debris, insert the nylon plug and screw in the tie. Lay the triangular end into new brick-work mortar beds as building proceeds.
The SST Cavity Starter Tie is available for specification on the NMB Source Platform.
If you are unsure which of our remedial ties you need then please call the office who can discuss your requirements.
For further information about which wall tie to use for non, remedial tie, specific issues please read our recent blog post, “Which Wall Ties should I use?” or contact the office on 01663 736 700.
