Wall Ties
Cavity wall tie corrosion is a problem which only became recognised and documented in the mid 80's. Clan were already a leader in the field of wall tie replacement by 1984 and have since been at the forefront of product development and in producing the first Code of Practice for the installation of replacement wall ties.

Metal wall ties used in cavity wall construction over the past 70 years have been inadequately protected from corrosion and the resultant effects have caused structural defects. These defects, horizontal cracking, bulging of walls or stepped cracking around openings have now been recognised as common occurrences which had hitherto been unexplained.

In the early days Clan realised that the defective fishtail tie could not be left in the outer leaf of the wall and that the removal or cropping of the tie resulted in the disfigurement and weakening of the facade, breaking a basic rule of conservation.

Clan are equally comfortable with the replacement of restraint and load bearing fixings to stonework and pre-cast panels and the making good of the facade itself, having worked on many prominent local public buildings.

The Ties The Application
Kontrakt 190
Grade A2 stainless steel body 5mm with 10mm copper alloy shells in accordance with BS 1243		 The Kontrakt tie is a general purpose fixing for use in brick, concrete and dense blockwork with the exception of the most lightweight of block.
GRIPTIE
Grade A2 stainless steel body 6mm with 11.5mm stainless shells to BS 970 Part 1 19991.		 The Griptie is a high quality versatile fixing for use in solid base materials and for high rise applications.
RESITIE
Grade A2 stainless steel rods either 5mm or 6mm.		 The Resitie is to be used in conjunction with Clan GP3 Resin where the walls to be tied are of a light weight block.
DRYFIX
Grade A2 stainless steel with a thread from one end and either a resin end or RT10 expansion anchor. (copper alloy)		 The Dryfix tie can be fixed into either solid brick/concrete or can be fixed into either hollow or lightweight brick/blockwork.
TIMBER TIE
Grade A2 stainless steel rod with a formed timber thread one end and RT10 expansion anchor the other end.		 The Timber Tie is designed specifically to tie back masonry walls to timber framed buildings.

Spacing For Remedial Ties
Recommended spacing for remedial ties varies upon the height and width of the wall. However, a density of either 2.5 ties per metre squared or 5 ties per metre squared is generally used. That is 900mm horizontally and 450mm vertically or 450mm horizontally and 450mm vertically respectivley. Spacing around window openings are reccomended to be 300mm vertically within 225mm of the opening.