Seeing a marked price difference between two quotations for outdoor systems is common, and that difference usually comes not from profit margin but from the product's technical content. Two pergolas that look the same can differ on many items, from profile wall thickness to motor brand, from gasket type to the number of anchors. In this article we look at the technical factors setting the cost and at how to work out total cost of ownership.
The first item setting the price is profile section and wall thickness. Aluminium is a material sold by weight; of two profiles with the same outer dimensions, the one with greater wall thickness is both more expensive and stronger. A thin-walled profile looks the same at first glance but deflects more under load and reaches its limit early on wide spans. We suggest asking for profile section and wall thickness to be stated in the quotation.
The second item is alloy and surface treatment. The aluminium alloys used in structural applications belong to different strength classes. On the surface, the class of the electrostatic powder coating is decisive: interior-grade coating can show chalking outdoors within a few years, while exterior-grade is formulated against UV. That difference is invisible in a quotation but plainly visible on the surface five years later.
On movable systems the motor and control unit are a significant cost item. The motor's torque, quietness, end-position memory and spare part availability all affect the price directly. A cheap motor does the same job in the first year; the difference appears when it fails. In setups where the motor is embedded inside the system, replacement labour can cost more than the motor itself. The motor is therefore not an item to economise on.
Gasket and water sealing details are items that generally do not appear in a quotation at all yet determine performance. Louvres locking together against EPDM gaskets in the closed position, water directed into concealed gutter channels and those channels drained through the columns each require separate labour and material. A system that skips these details is cheaper; you see the difference in the first downpour.
Anchoring and installation labour is an item often underrated. Correct installation includes identifying the substrate, choosing suitable fixings, using chemical anchors where needed, and a connection solution bridging the insulation on insulated façades. These operations take time and add cost. Against that, the structural safety of the system depends entirely on this item; economising here means structural risk.
On systems using glass, the glass type changes the cost markedly. Toughened glass breaks into small, blunt pieces; laminated glass stays in place when broken thanks to the PVB film between two layers. In overhead applications laminated glass is required for safety, and laminated glass costs more. This is not an item to economise on but a safety requirement.
Automation and sensors are items that look optional but are compulsory in some cases. On systems with wide fabric, a wind sensor is a practical necessity for protecting the fabric and mechanism; the user cannot be expected to be at home for every wind event. A rain sensor lets the system close itself in a sudden downpour. These items enlarge the investment but lower the repair cost.
Dimensions and form are the most direct determinant of price. Standard dimensions benefit from series production; sizes outside the catalogue require separate cutting, separate calculation and separate drawing. On curved, triangular or trapezoidal geometries that gap widens. The right question here is not how to lower the cost but whether to prefer a solution that accepts the real form of the space or one that reduces the space to a standard.
When comparing quotations the difference in scope must be seen. One quotation may give a price including survey, transport, installation, running the electrical line and commissioning, while another prices the product alone. In that case the quotation that looks lower can exceed the higher one once the missing items are added. To make the comparison meaningful, make sure all quotations cover the same scope.
Total cost of ownership is a more meaningful measure than the initial price and consists of four items: investment, maintenance, renewal and repair. The maintenance item is low for an aluminium structure; with timber, sanding and reapplication are needed every few years. Fabric is the part renewed by plan. The repair item depends directly on the quality of the first installation; weak anchoring and a cheap motor enlarge it.
Understanding the renewal cost correctly matters. When fabric is replaced, the cassette, tracks and motor stay in place; only the fabric and zip strip change. That shows why investing in the mechanism is sensible: a good mechanism serves through several fabric lifetimes. The same logic applies to frames on glass systems and to arms and cassettes on awning systems.
On a residential investment the return is not measured directly in money but in usable area. An unusable terrace is an area whose square metres are included in the property price yet which stands without function. The system's return is how many months and how many hours that area becomes usable. That is not a numerical ratio, but it is the most realistic measure when deciding.
On a commercial investment the calculation is clearer because capacity relates directly to turnover. The data needed is already in the business: the number of days the terrace closed because of rain, how long it stood empty over the winter months, the tables avoided because of the midday sun. Those three items show how many days the investment wins back. We covered the subject in detail in our article for venues.
In summary the price difference usually comes from items you cannot see: profile wall thickness, coating class, motor quality, gasket and gutter detail, anchoring solution and glass type. Asking for these items to be stated in writing when getting a quotation makes the comparison meaningful. Deciding on total cost of ownership rather than the initial price gives a better result in the long run. You can review our pergola systems and receive an itemised quotation for your project after the survey.
To receive an itemised quotation for your project, request a free site survey.
Frequently Asked Questions
Usually from items you cannot see: profile wall thickness, coating class, motor quality, gasket and concealed gutter detail, anchoring solution and glass type. The scope of the quotations may also differ.
Anchoring and installation labour, laminated glass in overhead applications, and the motor. These determine structural safety, user safety and repair cost respectively.
Four items: investment, maintenance, renewal and repair. Fabric is the part renewed by plan; because the mechanism stays in place, investing in a good mechanism lowers cost in the long run.
