- Roofing Frames
- Roofing Shapes
- The Roofing Process
- Roofing Tiles
- Plastic Roof Sheeting
Perhaps the most common roof we see in South Africa (in fact
worldwide) is the wood framed or trussed method. The most important
aspect of any roof is its frame; it is also what gives a roof its
pitch, or steepness. The pitch given to a roof is more than
aesthetics, it is practical too. In areas where bad weather is the
norm, the steeper the pitch the more practical it is. While we don’t
experience snowfall in South Africa, those countries that do generally
use a steep pitch as this allows the snow to slide off instead of
having to climb up and shovel it off. Not necessary in South Africa
and we would use a steep pitch for design aesthetics only.
Roofs are made in a variety of shapes and materials, generally
manufactured offsite they are delivered completely assembled, ready
to be installed. Roofs need to be designed and constructed very well
as they not only protect us from the elements the also protect the
structure beneath them be providing structural support for superimposed
loads. Modern roofing comprises an outer roof which is attached on top
of a deck surface which in turn is supported by a primary framework or
structure that comprises beams, arches or trusses. The shape of the roof
is dictated by the materials and the deck of the structure below.
The Roofing Process
A roof is built upwards from the structure of the building below. Its
primary framework rests on the walls or columns of the structure of the
building which in turn supports the roof deck which is responsible for
carrying the roofing assembly. The structure of the building is framed
with girders and the beams that rest on them are connected to these.
The roof deck spans between the primary framework and are anchored to
Roofing tiles are available in many modern materials such as concrete
and even plastic, clay or ceramics. They are designed to be “hung”
from the roofing framework and then fixed with nails. These tiles
are generally ‘shaped’ or have profiles, but can also be flat.
Flat tiles are the simplest form of roof tiling and are laid in
the same manner as roofing shingles are.
Plastic Roof Sheeting
Plastic roofing, or more precisely polyethylene roofing is applied in
sheets, much like steel roofing. Fixed directly onto the roof framework,
plastic roofing offers a homeowner up to 20-25 years lifespan. They are
available in many colour choices, offer good UV protection, will not rust
or break, offer good temperature isolation, will not oxidise, are
lightweight and easy to install, are not brittle and are very price
Whatever your personal choice of roof cladding, the basic construction of
any roof remains the same, are construction from much the same materials
and offers a homeowner pretty much the same lifespan.