A skillion roof is a single sloping plane, higher at one edge and lower at the other. It is the simplest and most versatile patio roof, with clean lines that suit modern homes and a low profile that sits neatly against older ones. In Greater Dandenong, where Moorabbin Airport records rain on about 103 days a year, the steady fall of a skillion roof carries water to one gutter quickly and reliably. Peak Pergolas designs and builds skillion roof pergolas and patios across Dandenong, Keysborough, Noble Park, Springvale and nearby suburbs, attached, raised or free standing, in Colorbond, clear or insulated roofing.
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Skillion roof pergolas in Dandenong are set up in three ways, depending on whether the roof should fall away from the house or rise towards the garden.
Because a skillion has only one slope, it can be pitched in whichever direction suits the site. On a narrow side area it can fall towards the boundary, on a deep yard towards the garden, and against a two-storey wall it can tuck under the upper windows.
Whichever way it falls, the roof is set out from measured heights at both ends of the house, so it sits square to the wall and level across its width.
The most common skillion patio is fixed to the fascia or a wall beam and falls gently away from the house to a gutter on the outer edge. It is the most economical layout and covers the alfresco outside the family room with a clean, flat-looking roof.
A raised skillion is set on brackets above the gutter and pitches up towards the garden instead of down. The high outer edge opens the patio to the view and the sky, lets more light into the house and suits a modern home with a tall, open alfresco. The water then runs back towards the house to a gutter on the low side.
A free standing skillion pergola stands on its own posts, braced in both directions, over an outdoor kitchen, a spa or a seating area in the garden. The slope is set so water runs away from where people sit. See free standing pergolas.


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A skillion roof looks simple, but the pitch, the gutter and the roofing all decide how well it works.
The underside of a skillion can be left open, showing the rafters, or lined with a flat ceiling. Insulated panels give a lined ceiling automatically, while a sheet roof can be lined with battens or a fibre cement soffit for a finished look, with downlights set in.
The pitch is set from the fascia height, the depth of the patio and the headroom needed at the low edge. A steeper pitch sheds water faster and looks more architectural; a lower pitch keeps the roof low against a single-storey home. Every skillion has at least the minimum fall the roofing manufacturer sets for that sheet, so water never sits on the roof.
All the water from a skillion roof runs to one edge, so the gutter on the low side is sized for the full roof area and the downpipes run into the stormwater system. Winter brings the most wet days at Moorabbin Airport, around 11 to 12 a month in July and August, and a well-sized gutter stops water spilling over onto the slab.
Colorbond sheet is the standard skillion roof. Clear or tinted polycarbonate lets light through to the house behind, and insulated panels make a cooler, quieter patio with a finished ceiling. See insulated patios and polycarbonate pergolas.
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A skillion looks simple, so the quality shows in the design and the paperwork: the pitch set to the house, the colours matched, and the permit and engineering lodged before work starts. Every job is quoted in writing with each item listed.
Skillion roofs are also the easiest to extend. If more cover is wanted later, a second skillion can be added beside the first at the same pitch, or the original roof lengthened on new posts, without changing the look of the house.
On a modern rendered home, a skillion is drawn with slim posts and a charcoal or black frame to match the window frames. On an older brick or weatherboard home in Noble Park or Springvale, the colours are taken from the gutters and trim so the patio sits quietly beside the house. The measure records the fascia, eave, window and door heights so the roof clears everything it needs to.
A roofed patio is treated like a verandah in Victoria and needs a building permit. Footings are sized from a soil test, posts are bolted to stirrups or base plates and the roof is fixed for the January sea breeze, when the mean 3pm wind speed at Moorabbin Airport peaks at 23.3 km/h. The engineering is prepared with the drawings and lodged through a private building surveyor. See pergola permits.


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Every skillion roof pergola is priced from a free measure and a written, itemised quote.
Skillion patios also suit staged projects. A simple skillion can be built now and outdoor blinds, screens, lights and a fan added later, because the frame and power points are planned for them from the start.
A skillion is the most economical roof shape, below a curved or gable roof of the same size. The roof area sets most of the price, a raised skillion adds brackets and taller posts, and insulated panels cost more than Colorbond sheet. A free standing skillion costs more than an attached one because of the extra posts and footings.
Removing an old pergola or awning is priced as its own line. On the sandy or former swamp ground in parts of Keysborough, Bangholme and Springvale South, a soil test can call for deeper or wider footings, which are priced from the result.
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The roof shape is the first design decision for any patio, and the skillion sits between the flat roof and the gable.
For a flat-roofed modern house, a skillion pitched up away from the wall echoes the clean lines of the home and lets more light in, while for an older house a skillion falling gently away from the fascia keeps a low, tidy profile that does not compete with the main roof.
A flat patio roof is really a skillion at a very low pitch, set just steep enough to drain. A true skillion has a steeper, visible slope that sheds rain faster and gives a more deliberate, modern look. Where the eave is low and headroom is tight, a low-pitch roof is the practical choice; where the space is open and the look matters, a steeper skillion stands out. See patios.
A gable roof rises to a ridge and suits homes with a pitched tiled roof, where it repeats the shape of the house. A skillion suits modern homes, narrow spaces and patios against a wall, and costs less. See gable roof pergolas.


A visit to measure the house and the yard, talk through materials, roofs and colours, then a written, itemised quote.

Drawings and engineering are prepared for the site and the building permit is arranged wherever one is needed.

Footings, frame and roof are built and inspected at each stage, the site is cleaned up and the finished structure is handed over.
A skillion is the most economical roof shape. The roof area sets most of the price, a raised skillion costs more, and insulated panels cost more than Colorbond sheet. A free measure gives a written, itemised quote.
At least the minimum fall set by the roofing manufacturer, so water never sits on the roof. Beyond that, the pitch is set by the fascia height, the depth of the patio and the look wanted.
Yes. A raised skillion is set above the gutter and rises towards the garden, opening the patio to the sky and letting more light into the house.
Yes. Insulated panels work well on a skillion, giving a cooler, quieter patio and a finished sloping ceiling for lights and a fan.
Yes. A roofed patio is treated like a verandah in Victoria and needs a building permit. The drawings and engineering are prepared as part of the job.
A gable suits a home with a pitched tiled roof. A skillion suits modern homes and narrow spaces, and costs less.
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