Phenolic insulation is manufactured by a process in which a plastic foam forms an insulating core between two flexible tissue faced layers. It has a high closed cell content and fine cell structure.
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Rigid phenolic insulation is produced by mixing high solids and phenolic resin with a surface acting agent. The heat created by the reaction evaporates a volatile liquid blowing agent in the mixture which produces a network of small bubbles in the material. The foam can be cured to create one of two forms of the product. It can be manufactured by a continuous process to create thin sheet material which is laminated with various facings and cut into boards.
Rigid phenolic insulation products offer very good thermal insulating properties due to the very low thermal conductivity of phenolic foam, compared with rigid polyurethane or extruded polystyrene. It can actually be 50% more effective than other common insulation materials. Its low thermal conductivity allows specified thermal performance targets to be achieved with minimal thickness of insulation. This is particularly significant where space saving is important.
Rigid Phenolic insulation has a high closed cell content and fine cell structure. It is lightweight, easy to transport , handle and install. The core of Kingspan Kooltherm® K5 is a premium performance rigid thermoset fibre-free phenolic insulant manufactured with a blowing agent that has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). Kingspan Kooltherm® K5 is faced on both sides with a glass tissue based facing, adhesively bonded to the insulation core during manufacture.
The compressive strength of Kingspan Kooltherm® K5 typically exceeds 100 kPa when tested to BS / I.S. EN 826: (Thermal insulating products for building applications. Determination of compression behaviour).
Rigid phenolic insulation is resistant to fungus and mould growth and will not sustain vermin.
Rigid phenolic insulation can withstand continuous temperatures of up to 120 degrees C.
Moisture has a minimal effect on its thermal performance. Rigid phenolic insulation has a 95% (or greater) closed cell content which makes it highly resistant to moisture penetration. It also has a low water vapour permeance. Phenolic foam is also non-wicking. This means that if water enters the insulation system due to the vapour barrier becoming punctured, any moisture ingress is limited and confined to the punctured area. This ensures moisture does not build up and compromise the whole system.
Rigid phenolic is dimensionally stable and can be cut accurately to achieve a snug fit in situations such as between rafters where airtightness will be improved.
Rigid phenolic insulation is non- biodegradable but waste material can be put back into the manufacturing process for reuse.
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The λ-values and R-values detailed below are quoted in accordance with BS / I.S. EN : + A2: .
The boards achieve a thermal conductivity (λ'value) of:
Thermal resistance (R'value) varies with thickness and is calculated by dividing the thickness of the board (expressed in metres) by its thermal conductivity. The resulting number is rounded down to the nearest 0.05 (m2.K/W).
Kingspan Kooltherm® K5 ' produced at Kingspan Insulation's Pembridge, Herefordshire manufacturing facility ' is certified to BES (Framework Standard for the Responsible Sourcing of Construction Products) 'Excellent'.
Kingspan Kooltherm® K5 produced at Kingspan Insulation's Pembridge, Herefordshire and Castleblayney, Co. Monaghan manufacturing facilities is manufactured under a management system certified to ISO : .
The above information is correct at the time of writing. Please confirm at the point of need by contacting Kingspan Insulation's Technical Service Department (see rear cover), from which copies of Kingspan Insulation's certificates can be obtained
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Phenolic insulation is a rigid type of insulation with a closed-cell structure, commonly used in construction projects such as ductwork, walls, roofing, and flooring. Due to its design and thermal properties, phenolic insulation is the most thermally efficient insulation commonly used. Phenolic insulation is commonly available in R-values between R-6 up to R-24 in a single sheet of board, but two phenolic insulation boards can be used together to achieve higher R-values such as R-30 to R-45 depending on the thicknesses.
Phenolic insulation is made through a process of utilizing a wet foam mix which is first added to the bottom layer of facing. It then expands to meet the top layer. This is then cooked under pressure and cured in a second oven. When ready, the phenolic insulation boards are cut to the right size and packaged up.
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