A timber pergola brings natural warmth to a garden or alfresco, and it suits the brick and weatherboard homes found across Dandenong, Noble Park and Springvale. Timber softens a hard facade, can carry a grapevine or shade cloth, and can be left open with rafters or covered with a solid roof. Peak Pergolas designs and builds timber pergolas across Greater Dandenong, attached to the house or free standing, in hardwood or treated pine. Each one is measured on site, drawn to suit the home, set on galvanised stirrups so the posts stay clear of wet ground, and finished to stand up to summer sun and the 100-plus wet days a year recorded at Moorabbin Airport.
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Timber pergolas in Dandenong come in four main forms. The choice depends on whether the space needs rain cover, how much winter sun should reach the house and whether the pergola belongs against the wall or out in the yard.
An open pergola has posts, beams and rafters with nothing on top. It gives dappled shade, lets winter sun through to the rooms behind and frames the garden. Rafter spacing and depth set how much shade it casts, and battens across the rafters add more.
A timber frame can carry a Colorbond, clear polycarbonate or insulated roof. The timber keeps its warm look from underneath while the roof keeps rain off the table. The rafters are sized for the roof weight and the roof is set with a fall to a gutter. For clear sheet, see polycarbonate pergolas.
An attached pergola is fixed to the fascia or to a ledger bolted to the wall, with posts only at the outer edge. On weatherboard homes the ledger is flashed behind the cladding; on brick homes it is bolted into the brickwork. It is the most common layout over a back door or alfresco.
A free standing pergola stands on its own posts, braced in both directions. It suits a seating area in the garden, a spot over an outdoor kitchen or a corner by the pool. See free standing pergolas for steel and aluminium versions.


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A timber pergola design starts from the house: its age, its materials and how the back yard is used. The same frame can look traditional or modern depending on the details.
Timber also suits a pergola that will be changed over time. An open frame built now can take a Colorbond, clear or insulated roof later, as long as the rafters and beams are sized for it from the start, so the frame is often specified a little heavier than an open pergola strictly needs.
On post-war brick and weatherboard homes, a simple design with square posts, a doubled beam and evenly spaced rafters with shaped ends looks right. Painted white or in a colour taken from the window trim, it suits the period of the house without looking fussy.
On newer homes in Keysborough and Lyndhurst, a modern design uses larger square posts, flush beams, close battens instead of rafters and a dark or natural oil finish. Combining timber with charcoal steel posts or a flat Colorbond roof gives a clean, contemporary look.
An open timber pergola is the traditional frame for a grapevine, wisteria or ornamental creeper, which gives summer shade and drops its leaves for winter sun. Rafters for a vine are sized and spaced to carry the weight of mature growth. Shade cloth stretched across the top is a lighter option that can be taken down for winter.
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Timber lasts outdoors when it is the right species, kept off the ground and protected from water and sun. Each of those is built into the job.
Hardwood is dense, strong and naturally durable, and spans further for its size; it costs more and is heavier to work. Treated pine is lighter and more economical, and the preservative treatment protects it against rot and termites when it is used above ground. Both are sized to the span and the load, and the choice often comes down to the look and the budget.
The most common reason a timber pergola fails is rot where the posts meet the ground. Every post stands on a galvanised stirrup bolted into a concrete footing, so the end grain sits above the soil and dries out after rain. Footings are sized to a soil test, which matters on the sandy and former swamp ground found in parts of Greater Dandenong. Beams are bolted to the posts and every joint is bracketed so the frame holds in the summer sea breeze.
Moorabbin Airport records about 700 mm of rain over roughly 103 days a year, and January afternoons average 26 °C. Bare timber greys and checks under that mix of sun and rain. An oil or stain keeps the natural look and needs recoating every year or two; paint lasts longer between coats and can match the house. The top faces of beams and rafters are sealed because they take the most weather.


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Each timber pergola is priced from a free measure and a written, itemised quote, so the cost is known before work starts.
The timber grade matters as much as the species. Structural grades are used for posts and beams so the spans can be engineered, while appearance grades with fewer knots are used where the timber is on show and will be oiled rather than painted.
The floor area and the timber chosen set most of the price. An open treated pine pergola is the most economical, hardwood costs more, and adding a roof costs more again, with insulated panels at the top of the range. Larger spans need deeper beams, and an attached pergola usually costs less than a free standing one of the same size.
Many older backyards have a timber pergola that has rotted at the posts or sagged between them. Removing and disposing of it is priced as its own line, as are narrow side access and any extra footings on soft or filled ground.
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Timber pergola kits are sold in standard sizes and can suit a confident DIY builder on a simple, level site. A custom pergola is drawn to the actual house and block.
A kit supplies pre-cut posts, beams and rafters in a fixed size, with brackets and screws. It usually leaves out the footings, the engineering for the site, any fixing detail to the house and the building permit if one is needed. A custom pergola is sized to the space, cut to fit the fascia and the fall of the ground, and comes with footings, engineering and the permit drawings. See pergola permits for when one is needed.
Timber gives a warm, natural look and suits gardens and older homes, but it needs recoating. Steel spans further with fewer posts and does not rot, and powder-coated aluminium never needs painting. Where low maintenance matters most, see aluminium 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.
The cost depends on the size, the timber and whether it has a roof. An open treated pine pergola is the most economical, hardwood costs more, and a roofed pergola costs more again. Removing an old pergola is priced separately. A free measure gives a written, itemised quote.
A small open pergola can be exempt in Victoria if it is no more than 20 square metres, no higher than 3.6 metres and not more than 2.5 metres forward of the front of the house. A pergola with a roof is treated like a verandah and needs a building permit.
Hardwood is stronger, denser and naturally durable, and costs more. Treated pine is lighter and more economical and is protected against rot and termites above ground. Both last when posts sit on stirrups and the timber is kept sealed.
An oil or stain finish usually needs a recoat every year or two, depending on how much sun and rain it gets. Paint lasts longer between coats. The tops of beams and rafters wear first.
Yes. A timber frame can carry Colorbond, clear polycarbonate or insulated panels, with rafters sized for the roof weight and a fall to the gutter.
Posts set straight into concrete or soil stay wet at the base and rot from the inside. Galvanised stirrups hold the timber above the footing so it dries out after rain.
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