PRC.02 · Construction Process

Ventilated Facade

A ventilated facade is a silent machine: behind the slabs, an air channel works every summer afternoon carrying heat away. But the machine only works if the substructure is true and the air can enter low and leave high — the rest is scenery.

Air gap

4-8 cm

Ventilation

natural

Cladding

stone / metal

Lifespan

50+ years

Overview

TAV. 00

A ventilated facade is a double-skin cladding that separates the aesthetic and protective role from the insulating one. An air gap runs between insulation and cladding and, through the chimney effect, expels excess moisture and heat. It is the choice of high-end contemporary architecture: large stone or metal panels, crisp joints, and easy maintenance since every element is demountable.

The site score

TAV. H

The detail of the craftthe adjustable bracket

01Days 1–4

Sub-structure

Installation of brackets and rails (aluminium or stainless steel) anchored to the load-bearing structure.

Why it is done this wayBrackets are the bridge between the stone's weight and the masonry: UNI 11018's "first-level fastening". Every three-axis adjustment made now is a millimetre of coplanarity gained forever — the uprights cannot win it back.

fili e piombi · before drilling3 assi · bracket adjustmenttaglio termico · under the bracket

In handline and laserdrill and anchorstorque wrench

anchors per datasheet

The mistake that costs dearlyDrilling freehand without reference lines and plumbs: coplanarity lost at the brackets cannot be recovered — you dismantle and start again.

Site supervision checkPull-out tests on sample anchors; bracket adjustment report; thermal break pad present under every bracket.

"The facade becomes straight now, with the line stretched: afterwards, every slab inherits the error."site notebook — editorial synthesis

The beats — with site daysbeat 1 of 5

per datasheetanchors

click a beat · arrow keys ← → walk the site · dashed pauses are the chemistry at work

The invisible engine

The stack effect

TAV. G1

The sun heats the slabs, the air in the channel warms with them and rises: cool in at the bottom, warm out at the top. An unpowered engine that works exactly when needed — in summer's worst hours.

UNI 11018's ≥ 5 cm usable cavity is not red tape: below that section the draught does not start and the facade loses half its point.

The loads

Hung, but wisely

TAV. G2

Every slab sends its weight to the brackets and the wind to its fixings: the reference standard — UNI 11018-1, rewritten in 2023 after twenty years — calls brackets "first-level fastening" and demands they be verified on site, not by catalogue.

Visible or concealed fixing is an image choice; capacity, tolerances and tests stay the same. The slab "resting" on the one below is the classic saving paid back in creaks.

How it ages (and what betrays it)

TAV. P

LASTRE CHE CANTANOcreaking with thermal cycles → insufficient joints or bearing slabs (beat 04)

CANALE MORTOhot facade in summer → blocked vents or choked cavity (beat 03)

WIND WASHINGheat loss above expectations → open gaps between insulation panels (beat 02)

FUORI PIOMBOshadows and uneven joints in raking light → brackets set without reference lines (beat 01)

MACCHIE AI DAVANZALIdark streaks below openings → flashings without drips (beat 05)

Questions from the site

TAV. Q

Does a ventilated facade insulate more than ETICS?

No: the insulation layer does the insulating. The cavity works in summer — removing part of the heat before it reaches the insulation — and keeps the wall dry all year, which is the real gift to durability. In winter, thickness matters, as in ETICS.

How much does it weigh on an existing wall?

It depends on the cladding: thin porcelain runs at 30–40 kg/m², stone can far exceed it. That is why the substrate is verified first (beat 01) and anchors are chosen by pull-out tests, not by catalogue.

Does it need maintenance?

Little but real: periodic inspection of grilles and vents, a clear channel, sample checks on fixings. The advantage is that the skin dismounts slab by slab: local damage is never a full redo.

Ventilated facade or ETICS on an apartment block?

Different roads: the ventilated facade costs more but shields driving rain better, lasts longer and handles summer well; ETICS wins on cost and simplicity. Budget, aesthetic constraints and exposure usually decide.

Materials involved

TAV. M

Intrusive Igneous Rock

Reference regulations

4 norms

Informational links to the regulatory framework. Always verify the current text on the official source.