Running-In a Brick-on-Edge Coping

When laying bricks on edge to a string-line, there are a number of issues to consider. As is the case with all running-in to a line, it is important to make sure that the brick is laid as close to the line as possible, without touching it. The brick-on-edge coping must be level across its width and, while the string-line provides a reference for line and level at the front, it is very easy to run out of level at the

Подпись: Variation in Brick Length It is important to select bricks for a brick-on-edge coping that are reasonably consistent in length. Too much variation is undesirable because the front will be nice and straight from

back when attempting to make such a judgement by eye. Accordingly, a method must be found that ensures level from front to back; this can be achieved in one of two ways. The first option is to use a boat level to check every brick for level after it has been laid to the line (see Fig 212). Some bricklayers consider this too time-consuming and go for the second option, which is to erect a second string-line at the back to provide level only along the back edge (always remembering that bricks vary in length so this second line is for level only and not for lining in the back edge!)

Running-In a Brick-on-Edge Coping

Fig. 212 Each brick-on-edge is laid to line and checked for level front to back.

Подпись: being run-in to a string-line but the back edge/face will be very uneven.

The disadvantage of two string-lines is that the presence of the second line interferes with the laying process and not all bricklayers have a second set of lines and corner blocks in their tool box anyway.

When laying a brick-on-edge coping to a line, only the smallest dimension of the brick (65mm) is being aligned with the string. This makes it easy and quite common for the brick to lean over from side to side (making the vertical cross-joint taper and become ‘V’-shaped). It may also result in the brick not sitting square with the front to the wall (making the cross-joints on top appear tapered and ‘V’-shaped). While trying to cultivate a good eye for these issues, it is a good idea periodically to use a boat level to plumb the bricks and a small square to check that the bricks are perpendicular (square) to the main wall line.

Finally, it is vital to ensure, as with all facing brickwork, that the bricks are kept clean and free of mortar staining. This can sometimes be a problem on the top surface of a brick-on-edge coping when trimming off mortar from the cross-joints, as using the edge of the trowel tends to drag the excess mortar across the brick surface. Instead, the point of the trowel should be used, and run along the joint.

Running-In a Brick-on-Edge Coping

Fig. 213 Excess mortar is trimmed from the cross-joints using the point of the trowel.

Laying the last brick in the coping can also prove problematic in terms of keeping the brickwork clean. When laying the last brick-on-edge, place a thin cross-joint on both bricks that have already been laid and thin cross-joints on both sides of the last brick being laid. Gently ease the last brick downwards into place, ensuring that the mortar does not squeeze out too much and smudge the face of the bricks.

Running-In a Brick-on-Edge Coping

Fig. 214 The last brick-on-edge is laid using a particular method.