Wall & Roof Insulation — PIR, Rock Wool and Envelope Panels

What we deliver

Imported high-performance wall and roof insulation — PIR panels, rock wool panels and insulated envelope systems for industrial, warehouse and commercial buildings, installed as part of the facade package rather than as a separate trade.

Insulation is the least visible part of an envelope and one of the largest levers on running cost. It is also where ECBC compliance is most cheaply recovered when the glazing specification cannot be improved further.

Delivered work

Project	Location	Scope	Quantity
Anygraphics Factory	Noida, Uttar Pradesh	PIR panel, rock wool panel, semi-unitised structural glazing	6,500 sq. m.

How the materials compare

	PIR panel	Rock wool panel
Thermal performance	Higher per mm	Lower per mm
Fire behaviour	Combustible core, rated systems available	Mineral, non-combustible
Thickness for a given U-value	Thinner	Thicker
Acoustic performance	Moderate	Better
Typical use	General envelope area, tight build-ups	Fire-critical zones, compartment lines
Relative cost	Comparable, varies by grade	Comparable, varies by grade

What drives the cost

Target U-value under ECBC for the climate zone · core material and fire grade · panel thickness · whether the roof is new-build or overlay · span and support spacing · sheet profile and finish · junction and flashing complexity.

Where projects go wrong

• Insulating the walls and neglecting the roof. On low-rise industrial buildings the roof usually carries the larger share of the heat gain.
• Ignoring the fire grade in a ventilated cavity. Combustible insulation behind a combustible panel with a continuous cavity is the assembly that has caused the worst facade fires.
• Thermal bridging at fixings and brackets. Continuous metal through the insulation can undo a significant share of the specified performance.
• Poor junction detailing. Corners, parapets, penetrations and eaves are where insulation continuity is broken, and where condensation appears.

Why Hagerstone

Envelope treated as one system. Insulation, cavity, membrane, sub-frame and outer skin detailed together by the same in-house facade team that delivers the cladding and glazing.

Industrial experience — delivered on live factory and warehouse envelopes alongside structural glazing, where sequencing around production matters as much as the specification.

100% in-house execution, ISO 9001 / 14001 / 45001, 79+ quality checkpoints.

Standards referenced

Opaque assembly U-value targets by climate zone under ECBC 2017. Fire and life safety for external wall assemblies under NBC 2016, Part 4. Core reaction-to-fire classification expressed to EN 13501-1.