| |
SOME BRICKLAYING BASICS ...
Brickwork should always be laid level & plumb, from point to point & each brick within itself.
Just click below to browse some of the basics of the bricklaying trade..!
Updates to these information pages will be added as they become available, so please revisit soon. Plus, if you have any suggestions for a topic, please email via the contact page.
There are many and varied styles, textures and finishes available in todays market for the new home builder or renovator, the most common type being the standard size house brick (230x110x76mm).
'Face' brickwork is exactly that, face quality laid to a finish which will be the seen product. 'Common' brickwork on the other hand is usually brushed & cleaned up ready for the next stage which may be bagging, rendering or painting.
Many different 'specials' bricks are still available but are seldom used for intricate or feature work due to individual cost, which is unfortunate as the end product can be stunning. Some of these styles are known as Bullnose, Bullnose header, Squints, Plinth, Cownose, Cant, Double Cant & the list goes on...!
Glass brickwork such as you may have seen in bathroom windows for instance, is all but dead with the introduction of pre-fab panels now available.
Masonry blocks are another alternative, with many different styles available, some of which create brilliant results. Split face sandstone imitation is probably one of the more popular being used. Traditional sawn sandstone in it's purest form gives the most impressive finish, although having a spending limit using sandstone may rule out using this product..!
TOP
FINISHES
A variety of finishes for masonry brickwork & blockwork are available on the market today. For new constructions, the mortar joints can be finished with a number of methods, the most common currently being used in the region is rolled or round jointed, where a hand tool is used by the tradesman to finish the mortar so that it’s slightly recessed and concave. Other finishes include Raking, Struck joints, Flush, or even Tuck Pointing…which is rarely seen today due to the high labour costs involved.
Another feature which has become very popular over the last decade in Victoria has been to use render in parts of the external walls, or entire constructions. This enables the builder to use what’s known as ‘Common’ bricks or seconds, as the look of the completed brickwork is irrelevant because of the rendering process. Quality of brickwork no matter what is still important, as some renders may only cover 3mm thick. Bricks must still be laid straight, plumb, & joints must be full & cut flush. Another reason for this is that if the brickwork is of a poor standard, extra costs may be incurred due to the renderer having to apply more render than otherwise needed to cover poor workmanship by the bricklayer. Render can be used as a sand based mix, or a bagged product such as Unitex.
Similar to rendering is ‘bagging’ brickwork. Unlike render where a smooth finish is generally achieved through 3-5mm of render, bagging is applied most commonly with a brush or sponge, giving a textured look. The materials used can also range from a straight mortar mix, with a higher ratio of cement used than composite mortar, to using additives such as ‘Bondcrete’ or ‘Gripflex’ which is mixed into the mortar, giving a much stronger mix and better bonding to the masonry wall.
TOP
QUANTITIES
In order to work out how many bricks are required for your project, you’ll first need to determine how many square meters of brickwork are to be built.
The standard house brick size is L230 x W110 x H76mm, when accounting for 10mm mortar joints gives us 50 bricks per square meter (BPSM ) of single skin brickwork.
The easiest method is to multiply the length of the wall by the height, subtract the area of any openings (doors, windows etc), and multiply the m2 result by 50 (BPSM).
As most windows & openings are made to standard sizes, brickwork is also gauged vertically & horizontally.
10 bricks long with joints = 2400mm.
7 courses of brickwork = 600mm
Note: to maintain 600mm gauge, 2mm is dropped per 7 courses of brickwork…
Course 1… 86mm
2… 172
3… 257
4… 343
5… 429
6… 514
7… 600mm etc…
Measurements quoted are reliant upon the quality of the manufacturer of the bricks. The standard house brick size can vary considerably, up to 7 or 8mm on any dimension, especially if ‘common’ bricks are to be used for instance on a wall which is to be rendered.
TOP
BRICKWORK BONDS
Traditional brickwork in Australia has long seen the demise of early bricklaying techniques such as Tuckpointing, and bonding like English Bond for example. Stretcher (or HALF bond) has taken over enormously in the last 40-50 years due to the efficiency and speed of construction…likewise, with the pressures on the budget, more intricate and time consuming work is very rarely requested.
Some examples of different bonding techniques which can be used, each of these bonds result in differing compressive & lateral strength, English bond being the strongest.
FLEMISH BOND
consists of alternating stretchers & headers
in each course of brickwork
Isolated Piers can be applied to a building project in many different instances…to support timber columns for veranda’s/pergolas, letterboxes, even garden features.
Sizes are usually dictated by the bricks being used (standard house brick 230 x 110 x 76mm) to allow the bricklayer to avoid cutting bricks. This results in square pier sizes of 350x350mm (1 ½ x 1 ½ bricks), 470x470mm (2 x 2 bricks), 590x590mm (2 ½ x 2 ½ bricks) & so on…we can also have different length along each side if required such as 1 ½ bricks wide, 2 ½ bricks length for example…either square or ‘L’ shaped.!
|
|