How subframe profiles determine the installation costs of a ventilated facade

Labour hours are often the deciding factor

Quotations are often compared on a price per linear metre of profile or per square metre of subframe. However, a realistic comparison must also account for installation costs, which involve more than materials alone:

• Profiles, brackets and anchors

• Screws, blind rivets and other fasteners

• Cutting, drilling and setting-out work

• Alignment and tolerance compensation

• Insulation and fire protection provisions

• Labour hours and remedial work

A system that requires slightly more profile metres but can be aligned and installed quickly may ultimately prove less expensive than a cheaper solution that demands extensive manual adjustment.

Consider the total installation cost

A subframe consists of more than profiles. Total costs also include wall brackets, anchors, fasteners, cutting and drilling work, alignment, insulation, fire protection measures, access equipment, engineering, logistics and labour hours.

The key question is therefore: how much time does it take to install the facade correctly, safely and to the required tolerances?

A straightforward calculation is:
Installation cost per m² = (labour hours per m² × hourly rate) + equipment + consumables + allowance for detailing

An I-Facade system may contain slightly more material than a basic profile solution, yet prove more cost-effective through reduced manual adjustment, less on-site modification and a lower risk of errors.

A complete I-Facade solution

A ventilated facade consists of facade cladding, insulation, a ventilated cavity and a subframe. The subframe connects the cladding to the primary structure and must accommodate dimensional tolerances.

Depending on the project, an I-Facade solution comprises wall brackets, extension plates, aluminium, steel or stainless steel profiles, anchors, screws, blind rivets, thermal breaks and a visible or concealed fixing method.

IPEX can cut and fabricate profiles to length and, where required, powder coat them to match the facade cladding. This reduces the amount of cutting, drilling and on-site modification required by the installer, supporting faster installation, clearer planning and lower defect costs.

The right system configuration for the project

A simple, flat facade requires a different solution from a tall, complex or refurbished one. On a level substrate, a straightforward profile configuration may be sufficient. Where greater tolerance compensation is needed, substrates vary, cladding is complex or concealed fixing is specified, a multi-layer subframe is often required.

A two-layer system typically consists of wall brackets with profiles, followed by carrier profiles or rails. This requires more material and installation steps, but provides greater flexibility in facade layout, insulation thickness and fixing method.

The choice is influenced by:

• the substrate: concrete, masonry, steel or timber frame

• weight and format of the facade cladding

• insulation thickness and required cavity depth

• wind load and building height

• profile and bracket spacing

• windows, doors, corners, reveals and other details

• accessibility of the facade

Selecting the correct I-Facade construction principle at an early stage minimises improvisation on site.

Adjustability saves time

On new-build projects with a level substrate, adjustment work is often limited. On refurbishment projects, existing masonry or facades with significant tolerances, this can represent a considerable time investment.

An adjustable I-Facade system allows profiles to be set accurately in a single plane, reducing the need for packing pieces, corrections and bespoke solutions. Wall brackets with extension plates enable flexible compensation for substrate variation and the required position of the cladding.

The benefit lies not only in faster installation, but also in fewer errors, less remedial work and more predictable programme management.

Details and fixing

A large, flat facade surface is relatively efficient to install. Windows, doors, reveals, corners, soffits, roof edges and offsets all generate additional setting-out, fabrication and fixing points. The number of square metres therefore does not fully reflect the actual installation costs.

The fixing method also plays a role. I-Facade offers visible fixing — for example with screws or blind rivets, with heads colour-matched to the facade cladding. For a clean facade appearance, concealed options are also available using plate hooks, clamps or adhesive systems.

Concealed fixing typically requires more preparation, but can be highly efficient on site when panels have been pre-prepared off site.

Preparation is cost saving

A well-designed subframe starts before installation begins. By fabricating profiles to length in advance, planning processing steps and delivering materials in the correct sequence, the installer needs to carry out fewer operations on site.

This is particularly valuable where storage space is limited, work is carried out at height, the programme is tight or the facade is complex. Good preparation reduces waiting time, material waste and defect costs.

I-Facade: efficient from design to installation

The least expensive subframe is not always the one with the lowest profile price. The lowest total installation cost is achieved through the right combination of materials, profile grid, adjustability, detailing and preparation.

With I-Facade, IPEX offers complete subframe systems for ventilated facades: from individual custom-length profiles and wall brackets to a fully coordinated system including fasteners, engineering and logistical preparation.

Would you like to know which I-Facade solution suits your facade project? IPEX is happy to advise on profile selection, material — aluminium, steel or stainless steel — fixing method and a system configuration designed for efficient installation.