12mm retrofit wall ties for re-connecting walls at junctions

Price excl. VAT
Price incl. VAT
(3 items in stock)

Retrofit Wall Connectors are long-series spiral fixings that are used to tie the facade of a building a wall that runs perpendicular to it. The 12mm diameter self-tapping ties are driven deep into masonry to form a mechanical connection that needs no cement, grout or resin, making them ideal for use when connecting walls on heritage houses, listed buildings and ancient monuments.

The heavy-duty 12mm diameter building ties are available in three lengths 610mm (24"), 760mm (30") and 910mm (36"); they have twice the strength of any other self-tapping spiral wall ties of similar design.  The connectors corkscrew into brick, block, limestone and concrete, when hammer-driven into an 8 or 10mm pilot bore, to offer outstanding resistance to compression, tension and shear loads

Manufactured from 316 marine grade stainless steel and with a cross sectional area of 28mm2, the structural connectors are ideal for pinning arches and re-connecting wall junctions, such as at corners and at party walls without the need for bonding agents, alleviating issues of material compatibility that often arise when cement grouts are used in old or listed buildings with lime mortar.

To install the Retrofit Wall Connectors simply drill the pilot holes and drive-in using a proprietary SDS adaptor.  The material cost of this heavy-duty 12mm spiral fixing system is similar to that of using traditional 8mm spiral bars with a proprietary cement grout and is at least 10 times as faster to prepare and install, delivering exceptional savings in labour costs.

In addition to tying walls to cross walls and party walls, these versatile structural masonry connectors are ideal for use on on brick or stone buildings to secure quoins, tie thick or rubble filled walls, pin masonry arches or to introduce vertical reinforcement to parapet walls.

  • Less disturbance caused to buildings than with any other retrofit system
  • Can be used at any temperature including sub-zero conditions
  • No material compatibility issues on old historic buildings with lime mortars
  • Cost effective with rapid installation rates

Retrofit Wall Connectors are UK designed and manufactured by Thor Helical under Patent No: GB 2439633.


Delivery options are only available for delivery to mainland UK (excluding Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man Northern Ireland and Eire). Delivery to Scottish Highlands, Scottish Islands, Channel Islands, Isle Of Man, Northern Ireland and Eire are limited to 20kg and are available at a Premium rate. Please contact us on or via our help line if delivery is required outside these areas. Alternatively select ‘World-wide Delivery’ and a member of our sales staff will contact you regarding your options and costs.


We offer for the mainland UK , as standard, a FREE delivery service on all orders having a value greater than £200.00 (excluding VAT). For orders having a value less than £200.00 (excluding VAT) a carriage fee of £8.50 + VAT will be levied. Goods will be sent by a national carrier on their 1-2 working day standard service. Customers must understand that delays can always happen while their order is with the courier, for this reason we can not guarantee your order will be with you next day.

It is important that the customer ensures that all the delivery details are correct and that the customer or someone acting for the customer is able to sign for the delivery. Twistfix accept no liability for failed deliveries as a result of incorrect delivery details or the absence of any authorised signatory. Twistfix will attempt delivery to the recipient between the hours of between 8am and 6pm. If no one is available to receive the delivery an attempt may be made to leave the item with a neighbour. Alternatively the carrier may return the item to the sorting office and leave a calling card at the recipient's address to advise of the attempted delivery. It is the responsibility of the customer to arrange to collect the item from the depot or to arrange re-delivery with the carrier. Further information regarding Delivery can be read at our Terms & Conditions.


Items returned and received in their original condition and packaging within 14 days of delivery will be accepted for exchange or refund subject to a 20% restocking fee. You will be responsible for the shipping costs incurred in returning the goods and should ensure the items are adequately insured while in transit to us. You should email to request to return items.

Where the goods are being returned because they are faulty or are not the goods that were ordered then, subject to the goods being returned in re-saleable condition, Twistfix will refund the cost of return shipping. Further information regarding Returns can be read at our Terms & Conditions.