Insulated walls need a facing that can move

An insulated elevation often arrives with two separate files: the insulation build-up and the facing the architect wants to see. Procurement that searches soft porcelain or flexible stone is usually trying to keep a stone face without adding a heavy second structure. The sheet can sit as a complementary mineral skin only after the wall system is named. Name the system first. Then name the series. Skipping that order is how a tender ends up with a pretty sample and a wall that rejects the adhesive.

Confirm the wall before the sheet

Insulated walls fail for the facing when the cladding cannot follow the movement the insulation system allows. A mineral flexible stone sheet is useful here because it is thin and light, not because the words soft or flexible replace an engineering file. Survey the substrate, the insulation type, and the movement joints the system already specifies. If that movement is outside what the series data sheet allows, change the facing or change the system. Do not invent a third path in marketing copy.

Overlay on a sound insulated board is a different question from a drained rainscreen. The sheet does not invent a cavity. It follows the adhesive and primer named for the series. Write that system into the tender. A photograph of a finished wall is not a specification. If the board is damp, loose, or already cracking, strip and rebuild before any mineral skin is discussed.

What the specification can lock

On the current mix the sheet is 2–4 mm thick and weighs 3–8 kg/m². Write the band into the specification, then replace the band with the number on the data sheet of the series being sampled. Mass in that band is what keeps the facing from becoming a second structure on the elevation. A brochure image does not state the mass. A cutting from another thickness does not carry the same fire class. Keep the sample and the data sheet in the same file as the insulated-wall detail.

Fire class follows thickness. Above 3 mm the path is Class A. Below 3 mm the coating-type rule on that sheet applies. Change the series and the class changes with it. Lock the class to the current data sheet of the specified series. Do not copy a class from a journal note into a tender for an insulated wall, and do not borrow a class from a thicker sample sitting on the table.

Looks that stay quiet on an insulated face

Insulated elevations often need a calm plane so the insulation joint and window line stay readable. Cement Panel and Ripple Panel are cast looks that recede under raking light. Travertine is the stone pit face when the project wants a lobby or street elevation read without slab weight. Match the sample to the elevation in the project light. The look changes how the wall reads. It does not change the thickness, mass, or fire rule on the sheet.

Compare quiet planes on the look board, including Cement Panel, before the insulated wall and the series are both locked in the tender.

Before the elevation is released

Ask for the current data sheet and a mill-run sample of the look that will face the insulation. Confirm the adhesive system named for that series on the board you will actually use. Thickness, mass, and fire class belong to the series. They do not belong to the search phrase soft porcelain, and they do not belong to a generic insulated-wall brochure. If the system moves, the facing must be allowed to move with it. If it cannot, stop before the order ships from Zhongshan.

See the look board, or request a sample and the current data sheet.