Encyclopedia of Insulation Engineering & Materials
A technical reference for engineers: heat and moisture physics, advanced materials, technical datasheets, application matrix and QA/QC tests.
Chapter 1: Advanced Insulation Physics and Modern Technologies
Every insulation system is governed by three heat transfer mechanisms, conduction, convection and radiation, and by how moisture behaves inside its layers. The U-value is calculated from the sum of thermal resistances, and condensation risk is assessed through the dew point. Advanced materials such as aerogel and vacuum panels deliver high resistance in thin layers, but cost more and demand precise design and installation.
Read Chapter 2Chapter 2: Technical Datasheets, Application Matrix and Quality Testing
A technical datasheet is not a list of standalone numbers: each value is tied to a test standard, conditioning and specimen age. Compare materials only under the same standard, distinguish typical values from guaranteed minimums, design with aged thermal conductivity, then prove site performance with adhesion, continuity, thickness and flood tests.
ReadEngineering glossary
- Thermal conductivity (k)
- Heat flow through one metre of material per degree of temperature difference; lower is better insulation (W/m·K).
- Thermal resistance (R)
- Layer thickness divided by conductivity (R = d/k); resistances of successive layers add up.
- Thermal transmittance (U)
- The inverse of the whole assembly's total resistance including surface films; the value the code limits.
- Thermal bridge
- Where the insulation layer is interrupted (beams, edges, openings), letting heat through faster.
- Dew point
- The temperature at which water vapour condenses; key to avoiding condensation under coatings and within walls.
- Vapour resistance factor (μ)
- How much a material resists water-vapour diffusion relative to air; guides vapour-barrier placement.
- Vapour barrier
- A low-permeance layer on the warm side of an assembly that stops vapour reaching layers where it would condense.
- Dry film thickness (DFT)
- Coating thickness after curing, measured in microns or millimetres to verify the specification.
- Holiday (spark) test
- An electrical test that finds pinholes in insulating coatings such as epoxy and polyurea.
- Pull-off adhesion test
- Measures the force to detach a bonded dolly, assessing how well a coating bonds to the substrate.
- Flood test
- Flooding a roof or tank for a set time after waterproofing to confirm there are no leaks before covering.
- Closed-cell
- Foam whose cells are mostly closed, resisting water uptake with lower conductivity and higher rigidity.
- Aliphatic / aromatic
- Isocyanate types in polyurea and polyurethane; aliphatic keeps its colour in sun, aromatic yellows and needs a topcoat.
- APP / SBS
- Bitumen modifiers in membranes: plastomeric APP tolerates heat, elastomeric SBS is more flexible.
- Crystalline waterproofing
- A cementitious product that reacts with moisture in concrete to grow crystals that block pores and fine cracks.
- Cant strip
- A sloped fillet where roof meets wall so the waterproofing doesn't fold at a sharp right angle.
- Concrete surface profile (CSP)
- Standard grades of concrete roughness after mechanical preparation, matched to the coating system.
- Solar reflectance (SRI)
- An index of a roof surface's ability to reflect sun and shed heat; higher for white reflective coatings.
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