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A 180-square-metre tea house on the ground floor of a 2018 building put a shading screen on the room side of its curtain wall. Not one hole was drilled. Three months after opening, a rectification notice demanded the original condition be restored. Behind that single sheet sit four documents: the lease, the fit-out agreement, curtain wall maintenance, and the pre-opening fire check.

On October 31, 2026, CITIC Tower launched its first ESG report at the International Hall on the 3rd floor of CITIC Tower, with Guorui Guo, General Manager of Zhongke Energy Consumption Control, in attendance. The report discloses a measured chiller COP of 6.61 and a 10.2% five-year reduction in energy use per square meter.

At night a curtain has exactly one job: thermal resistance. ISO 10077-1 splits the additional resistance of internal shading into three classes — 0.08, 0.11 and 0.14 — and what decides the class is not the fabric but the gaps. Here is the whole account, including what a second layer actually adds.

A laminated interlayer does three jobs at once in the same pane: it holds the glass together after breakage, it damps sound, and — if it is formulated that way — it can cut solar gain. But the three trade against each other, and the interlayer barely touches U-value. A plain-language guide to what sits inside your glazing.

Shandong's DB37/T 5097-2026 green building assessment standard takes effect on 1 November 2026. Three changes matter most for glazing: compulsory national codes become pass-or-fail control items, the roof/wall/window trio must meet hard limits with no trade-off route, and star ratings are only issued after completion — with an energy efficiency verification sheet. What it means for existing buildings.

When an office block becomes flats or hotel rooms, the window stays but every acceptance figure changes: 45 dB becomes 33 dB, 3.0% daylight becomes 2.0%, U 2.7 becomes 2.5, and a room occupied eight hours a day becomes one occupied for twenty-four. A practical breakdown of the four sums that have to be recalculated.

Heating is on and the window seat is still unbearable — but "several degrees colder" is never a number. A practical four-step check: touch the glass, get an inner-surface temperature with the right tool and the right emissivity, compare it with the dew point from JGJ/T 151-2008, then decide whether to fix air, fix glass or fix the unit itself.

Replacing a single curtain wall glass panel looks simple on paper. In practice it runs through a long chain: matching the glass batch and coating colour, cutting out the old panel, hoisting, sealing, and a structural silicone curing period of one to two weeks before water testing. A walk through the five stages — and a note on when the glass is fine and only the thermal performance needs fixing.

Shanghai's new urban renewal action plan for 2026-2028 is a city-upgrading document, not an energy policy — yet it commits to retrofitting 12 million square metres of existing housing and 18 million square metres of public buildings for energy performance. What the two quota lines mean, how they connect to the national carbon-peaking agenda, and which retrofit routes actually fit an update programme that insists on no large-scale demolition.