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What is the purpose of wall ties?

What is the purpose of wall ties?

By on Oct 28, 2015 in Water Proofing |

Wall ties are normally nor visible but this does not mean that they are not important. Wall ties in Brighton are used to tie together the external wall and the internal wall, spanning across the cavity between the two. These ties are commonly made from metal, braided wire or plastic. The purpose of wall ties is to effectively enable the loads that are carried by the inner wall to be shared with the outer wall; ties are embedded into the mortar as the house is being built. Walls will certainly outlive the wall ties and sooner or later they will fail and need replacing.

There are several designs of wall ties; they are selected based on the connection required as well as whether they are being used at the time of construction or for retrofit. Wall ties are little more than flat bands that are embedded in the mortar of one wall, spanning the gap between walls and being embedded in the mortar of the other wall. Wall ties are deformed at the ends to improve their ability to grip, the portion of the tie that spans between the walls is bent into an inverted V shape to help repel water.

Over time wall ties in Brighton will fail, this is particularly true for homes that are located close to the sea or close to an industrial area with higher than normal air pollution. When the ties fail it is very important that they be replaced to ensure structural continuity of the building. Click here to know more.

Metal ties in particular are subject to corrosion even though they were galvanised when first installed. Over time the mortar in which the ties are embedded undergoes a chemical change, the mortar becomes quite aggressive to mild steel even though they have a protective coating. Depending on the extent of the corrosion the signs of trouble can be a bulging exterior wall, a lifting of the masonry above the position of the tie and tell tale cracks in the mortar as well as evidence of rust.

Wall ties are easily replaced; one of the common methods that is employed uses helical shaped wall ties in Brighton which are driven into a pilot hole which is slightly smaller than the wall tie. When these types of replacement wall ties are used there is minimal cosmetic disruption to the outer wall as well as little damage to any insulation in the cavity.

If the wall on your home seems to be failing or you notice excessive rust on the brick surface the wall ties may have corroded and failed. For replacement of wall ties in Brighton you are invited to contact Cavitytech Systems Ltd.

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