. ‘Wall-Starter’ Systems
Tying in a new junction wall, particularly if it is for a large extension, can be very labour-intensive and time-consuming. A quick, simple and cost-effective alternative is the use of a ‘wall-starter’ system. There are
various versions on the market but the basic principle for all of them is much the same. Wall starters comprise two basic components: a metal channel or profile (usually stainless steel) and a set of metal ties. The profile is rawl-bolted vertically to the existing wall where the junction wall is to be joined on. Profiles come in individual lengths, from 900mm to 2m, depending on the manufacturer, and can be cut as required and/or clipped together to tie in junction walls of up to three storeys in height. Usually, one vertical profile is required for every half-brick thickness of the junction wall. The corresponding metal wall ties clip into the channel and are bedded at regular intervals into the bed joints of the junction wall as it is constructed.
As well as being quick, easy and cheaper, wall starters make it easy to tie in new brickwork of 75mm gauge to old existing walls of a different gauge that make use of bigger bricks and thinner bed joints. The only real downside is the fact that wall starters create a continuous vertical 10mm joint throughout the height of the junction and some find this unattractive. Others, however, can live with a straight joint, and are happy to make the compromise in order to save the extra time, effort and cost of cutting indents in the face of the existing wall. The straight vertical joint is usually either pointed and jointed with mortar or sealed with mastic.
Fig. 276 Staifix universal wall-starter system, a typical example of such a system, shown during construction with a new cavity junction wall being joined to an existing wall. Ancon Building Products