What is a lean-to roof?
roof is nothing more than a simple, sloping roof added to a building where the
upper edge of the rafters ‘lean’ against a wall or building. The
traditional, ethnic lean-to structures are mostly made of logs or
unfinished wood. They originated in Finland and were used as
temporary shelters while camping or fishing, but this pioneering
design has made its way down south into the hearts and homes of
countless Malaysians due to its simple, workable structure, low
installation cost, and the incredible protection they provide against
the unwavering rainy climate.
types of roofs are mainly used for constructing sheds, carports, and verandas. Adding a lean-to roof to your home or
shed is an easy, do-it-yourself project that only requires an extra
pair of hands to help.
materials can I use for my lean-to conservatory roof?
traditional lean-to roof, it’s more common to have a conservatory
roof that is transparent. These roofs are comprised of aluminum eaves
that provide support for the roof, along with glazed bars that are
fitted in between the eaves to complete the structure. Glass and
polycarbonate roofs are the most popular design options, each one
with its own perks.
Conservatory Roofs: Polycarbonate is nothing
more than thin sheets of plastic laid on top of each other, almost
honeycomb-like, that have bridging air sections to reinforce and
insulate the structure. It is the cheaper option compared to glass
(around 13MYR per 100m² for the higher-end variety), as the material
itself is less expensive to manufacture. But that’s not the only
advantage. It’s also easier to handle while building, harder to
fracture once complete, and it even needs less specification on most
weight loading cases. Sheets of polycarbonate are available in
different thicknesses (between 16-35mm), as well as a variety of
colors and types that reflect heat and add shade to the interior, and
they even require less cleaning maintenance as they hide dirt very
of the cons to a polycarbonate roof is the noise it produces when it
rains–this is a big point to think about when you live in an area
that gets constant rain. Because of its structure, there are pockets
of air in the roof which make the sound of raindrops echo through the
chambers of the roof and subsequently increase the external noise.
Thinner sheets of this material will also squeak and make some
popping noises when they increase or decrease in temperature.
Polycarbonate conservatory roofs have a lifespan of around 10-15
Conservatory Roofs: Glass roofs tend to be
preferred among homeowners, especially those that have rich green
surroundings. A glass conservatory will be warmer compared to
polycarbonate, meaning you don’t need to heat it manually as often.
Unlike polycarbonate, glass won’t amplify the sound of the rain and
you’ll be able to have full view of the sky during the day and a
view of the stars at night. Moreover, glass roofs will last longer.
terms of the cons, the glass roof will come at an additional
financial cost to you. Glass is more expensive and considerably
heavier, meaning it takes longer to build and there’s more of a
risk involved in the construction process.
do I build my own lean-to roof?
undertaking any home addition project, be sure to check with your
local building authorities for the code requirements in your area.
Get any permit you might need and be prepared for property setbacks
with storage buildings.
that, identify underground hazards. Lean-to roofs tend to require
some digging for concrete foundations, pier blocks, or postholes, for
example, and be sure to call a utility specialist, as you may run the
risk of digging into a power line in your yard.
up the project plan. Measure your structure and get your dimensions,
and figure out where your lean-to will attach to your building. Angle
the roof so that it can withstand the weather and direct rain away
from your property. Many people add gutters or downspout drainage
pipes to prevent pooling at the base of the roof.
decide on a solid foundation and on the materials you want to use for
the roof. Coordinate your new roof to match the style of your home or
shed where it will attach. Think about how you plan on using your
conservatory–consider your climate and how much you plan on being
there during the day, and how much sunlight you want. Finally,
calculate the amount of the materials and if they’re within budget,
What is the exact procedure to build a Lean-to Roof?
where you want to add your lean-to roof
2,4m from your existing structure in an outward direction and dig a
deep hole for the post to go in.
the post in the hole and fill it with concrete to securely set it in
this post, measure 90cm in the same line, dig another deep hole, and
set the second post. Repeat this process for posts three and four
and be sure to maintain the same distance between them.
a notch at the top of your posts. Here is where the supporting post
the supporting posts into the notches you’ve created.
the posts are set, attach metal purlins on the outer side of the
posts. Use nails for this step so that it remains firmly in place.
fasten the nailer on the side of your structure. Good quality screws
should be used here, as you will be attaching the upper end of your
rafters to this.
two planks on both ends of the nailer by firmly nailing them in and
placing them on top of the construction. Then, set a third plank in
set the roofing material by adding planks at regular intervals on
the top of the roof as previously done.
measure your roofing material and place it over the base of the roof
and screw it in.
install your choice of trim as a cover and screw it in with a drill.