What is the most important criterion when choosing a façade material?

There is no single one. Climate, fire safety, insulation, weight, maintenance and cost are assessed together; the visual choice comes after these are met.

Which façade material is the most durable?

Natural stone, brick and porcelain tile installed with the right details are long-lasting options. But durability depends as much on the fixing system and water details as on the material.

What is a ventilated façade?

A façade system with an air gap between the cladding and the insulation, where the cladding is mechanically fixed to a subframe. It keeps the insulation dry and makes maintenance easier.

Which façade materials can be used on tall buildings?

Regulations require higher fire performance for cladding and insulation as building height increases. Materials are chosen together with their fire classification certificates.

What is the most economical façade system?

In terms of initial cost, ETICS with decorative render is the most economical. But once maintenance and renewal are included, the difference may narrow over the long term.

When should you bring in an architect for façade design?

At schematic design stage. The façade system affects floor heights, the structure, the window layout and the budget, so it needs to be decided early.

Architecture · Façade Design · 4 min read

How do you choose façade materials?

Short answer: A façade material is not chosen on looks alone. Climate and orientation, fire safety, thermal and water insulation, load on the structure, maintenance needs and life-cycle cost are assessed together. The right façade is the system that balances these six criteria with the building's function and budget.

Güngören Urban Regeneration Project façade design, Sönmez Design

A façade is a system, not a cladding

A façade is a whole made up of the cladding material, the supporting subframe, thermal insulation, water and vapour control layers and the window frames. The same cladding, installed with the wrong detail, lets water in, stains or falls off. That is why the material decision is always made together with the system decision: adhesive fixing, mechanical fixing or a ventilated façade?

Diagram — The visual choice is made after the performance criteria are met; a sample is approved on the façade.

Six criteria to consider

Climate and orientation: sun, rain, frost and sea exposure determine a material's lifespan. Solar control is resolved separately on south and west façades.
Fire safety: the fire class of the cladding and insulation must meet the conditions of Türkiye's fire protection regulation for the building's height. The requirements become markedly stricter for high-rise buildings.
Thermal and water insulation: thermal bridges, condensation and watertightness are resolved in the detail. Ventilated façades keep the insulation dry.
Weight and structure: heavy claddings such as natural stone affect the subframe and seismic design.
Maintenance: cleaning frequency, joint and sealant life and ease of replacing panels determine running costs.
Cost: not just the initial investment, but lifetime maintenance and renewal costs are taken into account.

Materials compared

Material	Strength	Watch out for	Suited to
Natural stone	Long life, timeless look	Heavy; needs mechanical fixing and the right choice of stone	Prestige, public and religious buildings
Ceramic and porcelain tile	Colourfast, low maintenance	Workmanship is critical when bonded; mechanical systems are preferred at height	Residential and commercial buildings
Aluminium composite panel	Light, quick to install, wide colour range	The fire class of the core material must always be checked	Commercial buildings, offices
Fibre cement board	Non-combustible, light, economical	Edge and joint details need care	Residential, educational buildings
Brick and clinker	Texture, durability, low maintenance	Efflorescence and joint quality; weight	Residential, cultural buildings
Glass curtain wall	Daylight, transparency, lightness	Solar control and heat gain; fire barriers; cleaning	Office and mixed-use buildings
ETICS and decorative render	Most economical; good thermal insulation	Low impact resistance; the fire class of the insulation matters	Low- and mid-rise housing

The assessments in the table show general tendencies; results vary with product and workmanship.

What does a ventilated façade offer?

In a ventilated façade, an air gap is left between the cladding and the insulation. This gap drains any water that gets behind the cladding, keeps the insulation dry and reduces overheating of the façade in summer. Because the cladding is mechanically fixed, panels are easy to replace. On the other hand, the subframe cost and façade thickness increase, and fire barriers are needed at floor levels so that the cavity does not act like a chimney in a fire.

Façades in urban regeneration and housing

In housing projects, the façade budget is limited and maintenance later passes to the building management. That is why materials that need little upkeep, can be repaired piece by piece and still look good as they age are preferred. In our Güngören and Fatih urban regeneration projects, we based façade decisions on the relationship with neighbouring buildings, the balcony and window layout, and long-term ease of maintenance.

Common mistakes

Choosing a material from a catalogue or screen without a sample on the façade.
Checking the fire class of the cladding only, and skipping the insulation and lower layers.
Not relating the joint pattern to window and floor lines.
Leaving drainage, drip and sill details to the installers.
Not planning access for façade cleaning and maintenance.