Remedial Wall Ties

Corrosion of Cavity Wall Ties

Wall ties are an essential element in the stability of masonry panels. Prior to 1978, wall ties were usually manufactured from galvanised mild steel. These ties were expected to last the lifetime of the building, but for many years it has been recognised that some of these wall ties have corroded after only 15 or 20 years.

When these ties corrode, they can expand to seven times their original thickness. This causes the brickwork to crack at the mortar joints and can result in major damage and sometimes the collapse of walls.

Ancon 63 Mechanical/Mechanical (MM63)

Used when tying together two leaves of solid materials, this tie has mechanical expanders at each end. Requires 12mm Ø holes.

Lengths:
200mm for 45-70mm cavities
225mm for 71-95mm cavities
250mm for 96-120mm cavities
300mm for 145-170mm cavities

Ancon 63 Resin/Mechanical (RM63)

For use when the material in the inner leaf is perforated, of low-density or friable material. A resin fixing may be used to eliminate any imposed stress. Requires 11mm Ø holes.

Lengths:
200mm for 35-60mm cavities
225mm for 61-85mm cavities
250mm for 86-110mm cavities
300mm for 135-160mm cavities

Ancon Staifix Resin/Resin (RR)

Used where mechanical expanders are unusable. Normally inserted into a 10mm hole, but if test facilities are required, a 12mm hole must be used.

A plastic sieve can be used to retain resin and is particularly useful in perforated brick or hollow blockwork. A 12mm hole is required to fit sieve.

Lengths:
180mm for 40-60mm cavities
200mm for 61-80mm cavities
220mm for 81-100mm cavities
240mm for 101-120mm cavities
260mm for 121-140mm cavities
280mm for 141-160mm cavities

Stairib Bar

Stainless steel ribbed bar, resin-grouted into the inner and outer leaves. Requires 10mm Ø hole (6mm dia. bar) or 12mm Ø hole (8mm dia. bar).

Ancon AC 31

Used where bricks are removed then replaced in the outer leaf. The wavy end is resin-bonded into the inner leaf in a 10mm Ø hole. The triangular end sits in a bed joint. Ancon AC 31 can be supplied with a drip or a neoprene ring.

Ancon AC 31C

Similar to the AC 31 but cranked by 25mm to aid fixing to the inner leaf. Requires 10mm Ø holes.

Lengths:
175, 200, 225mm

Ancon Teplo-BFR

Basalt fibre wall tie featuring a plain end for anchoring in resin and a moulded safety end for building into a bed joint. This tie has a thermal conductivity of only 0.7 W/mK. Requires Ø10mm hole (to suit Ø7mm bar).

Lengths: 210-585mm

Teplo-R

Plain-ended basalt fibre wall tie that can be resin-fixed in remedial and retrofit applications. This tie has a thermal conductivity of only 0.7 W/mK. Requires Ø10mm hole (to suit Ø7mm bar).

HRT4/R

Used for tying the two leafs of a cavity wall or separating wall where the first leaf has already been built. The wavy end is resin-bonded into the existing wall in a 10mm Ø hole. The tie is based on the Ancon Staifix HRT4 and has similar properties.

Lengths:
200, 225, 250mm

Type A R/R

This is designed as a remedial tie for a separating wall. It will normally be inserted in 10mm Ø holes and resin-bonded into both leaves. It meets the requirements of a Type A wall tie to Approved Document E.

Length:
225mm

Ancon Staifix-Thor Helical Crack Stitching Kit

The Ancon Staifix-Thor Helical Crack Stitching Kit is a high strength, non-disruptive solution for the permanent repair of cracked masonry. Click here for more information.

Fischer FIS VL 410 C Resin

This CE-marked, two part system of vinylester and hardener is quick setting and suitable for a wide range of applications. The resin and hardener are stored in separate chambers and are safely mixed together inside the nozzle. Automatic mixing ensures an accurate blend and, being mixed only as required, the minimum of wastage. An extension nozzle will be required when resin fixing remedial wall ties in the inner leaf of a cavity wall. Dispenser guns and additional static mixing nozzles are available.