Who makes envelope for AI data centers

The envelope is roof, walls, insulation and vapour barrier — everything that separates conditioned space from weather. On most buildings it is an energy-efficiency component. On a data center it is closer to a containment system, because the building is rejecting heat rather than retaining it, and the envelope's job is to keep weather, moisture and outside air out of a space whose humidity is controlled. Insulated metal panels dominate because they combine structure, insulation and weatherproofing in one component that installs quickly, which matters on a compressed schedule. Air-tightness gets attention it would not get elsewhere: uncontrolled infiltration undoes humidity control and can bring in contaminants, and on sites near industry or agriculture the outside air is a real problem for electronics. Roofing carries an additional load in this building type, since mechanical equipment sits on it and the penetrations for pipe and conduit are numerous — and every penetration is a future leak over a hall full of equipment. Fire performance of the panel core is a code question that has become sharper after external fire incidents in other building types. What to look for is panel core material and its fire rating, whether air-tightness was tested rather than specified, and roof detailing at penetrations, which is where envelope failures on this building type actually occur.