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Glossary

BioFoam® - Back to top

Material produced from the renewable resource PLA. BioFoam® has cradle-to-cradle certification, 100% recyclable and can be reused and remoulded into new products. In addition, it can be completely biodegraded, composted or used for feedstock for recycling.

BRE - Back to top

Building Research Establishment: Organisation that provides research and consultancy services that help support the development of a better built environment.

BRE Green Guide - Back to top

The Building Research Establishment’s Green Guide to Specification: Document that provides a guide to the environmental impact of building materials which aims to be easy to use but firmly backed up by numerical data.

BREEAM - Back to top



Building Research Establishment Environmental Assessment Method: De facto standard method for rating best practice in sustainable building design, construction and operation. BREEAM assessment uses a transparent scoring system to rate a building environmental performance.

CERT - Back to top

Carbon Emissions Reduction Target: Reduced carbon target that the energy companies must achieve. Measures as diverse as Compact Fluorescent Lamps (low energy bulbs), shower regulators and loft insulation have been included. Since the CERT extension (March 2011 - December 2012), 80% of measures are based on insulation. Similar measures will be funded by ECO and the Green Deal post 2012.

CESP - Back to top

Community Energy Saving Programme: scheme to reduce energy through tackling whole communities with multiple measures. The scheme encourages more than one measure to be fitted at a time by increasing funding for multiple measures. Solid wall insulation is incentivised with higher funding in this scheme. CESP will finish at the end of December 2012. Measures under CESP will be funded by ECO and the Green Deal post 2012.

Condensation - Back to top

Water vapour that has returned to liquid state when in contact with a cold surface. Often seen on the inside of single glazed windows on a cold day.  Because cool air cannot hold as much moisture as warm air where air is in contact with a surface that is significantly cooler, moisture condenses out onto that surface. This can be a particular problem if the area of condensation is hidden or contained so evaporation is restricted.

Cut-to-Fall Roof - Back to top

Also known as 'tapered roofs', insulation is used on the deck of a flat roof to improve water flow as well as to insulate. The roof is totally customised with panels assembled to a plan.

Dynamic Insulation - Back to top



Jablite have developed an insulation system that has channels through which air is drawn. The air is then pre-warmed from heat that would otherwise escape the building. This allows extremely low U-values of 0.07W/m²K to be achieved. Dynamic insulation products are available for cavity wall and external wall insulation.

ECO - Back to top

Energy Company Obligation: compulsory commitment on energy companies by the Government to reduce carbon emissions. This will replace schemes like CERT (Carbon Emissions Reduction Target) and CESP (Community Energy Saving Programme). ECO commences in October 2011.

EPC - Back to top

Energy Performance Certificate: all new houses, houses on the market, and rental properties must have an EPC. This shows the current energy efficiency and carbon emissions and the measures that can be taken to improve performance.

EPS - Back to top

Expanded Polystyrene: Lightweight inert foam material that consists of 98% air. Made by the polymerisation of styrene (an oil derivative), styrene is also found in strawberries and nuts. Widely used in packaging, insulation and civil engineering applications.

EWI - Back to top

External Wall Insulation: Insulation that is attached to the outside of a building’s walls. In the UK this is more common as a retrofit for solid wall properties. These are properties typically built before 1920 and are very poor in terms of thermal performance. Insulation is attached to the outside face of the wall by mechanical or adhesive means. A wide variety of finishes can then be applied e.g. render, brick slips etc. This can be also be used in new build as an alternative to building a wall with a cavity and filling the cavity with insulation.

FRI - Back to top

Flat Roof Inverted: A Jablite product specifically designed for use in inverted roof construction. Inverted roofs require an insulation material that is very low in moisture absorption. This rules out many insulation materials – Jablite FRI is a special form of EPS that has less than 1% moisture absorption. In addition the panels are large size to enable faster installation. Because FRI is available in lots of thicknesses no build up is required – a single thickness suffices.

Green Deal - Back to top

Flagship government initiative to increase the energy efficiency of British properties in the public and private sectors. From autumn 2012, participating energy companies and accredited retailers such as Tesco, B&Q and Marks & Spencer will provide customers across the UK with quality-assured work to their homes, businesses and community spaces for no upfront cost, and without loans or advance finance. The full cost of the measures will be recovered through instalments on the energy bill over several years, and because the Green Deal is not a personal loan or an advance payment scheme, there is no obligation to continue paying the instalments if you move house.

GWP - Back to top

Global Warming Potential: relative measure of how much heat a greenhouse gas traps in the atmosphere. For insulation products that use blowing agents the GWP is based on the blowing agent – the lowest range (i.e. the most ‘green’) is less than 5. EPS falls into this category.

Infill Panel - Back to top

Insulated EPS panel that is used with suspended concrete beam flooring system. The panels are used in placed of concrete blocks allowing easier, faster installation of high thermal performance floors.

Inverted roof - Back to top

Sometimes known as an ‘upside down roof’ these roofs have the opposite build up to a conventional roof - the insulation is actually above the roof structure. This structure is from the bottom waterproof membrane, insulation, filter medium, ballast (paving slabs, gravel etc.). Because the waterproof membrane is completely covered by insulation the roof can have twice the life of a conventional roof construction.

ISO14001 Environmental Management Standard - Back to top

International framework to assist organisations in developing their own environmental management system.

Jablite Premium - Back to top

High performance EPS material that is enriched by carbon giving it an improvement in thermal performance of approximately 20%

ODP - Back to top

Ozone Depletion Potential: Relative amount of degradation to the ozone layer a material or product can cause.

PEA - Back to top

Predicted Energy Assessment: fulfils the same function as EPCs but are used where properties are sold before they are built e.g. buying off plan. When the building is completed an EPC will be issued.

Phenolic - Back to top

Resin made of phenol and an aldehyde that is shaped into rigid insulated boards.

PIR - Back to top

Polyisocyanurate: Rigid foam insulation material normally used with a facer material to improve performance. Commonly used for cavity wall insulation in partial fill.

Plasticiser migration - Back to top

Chemical reaction between different plastics that can cause deterioration. This can cause the insulation cover of electrical cables to become brittle. Typically cables are insulated with PVC – these cables should not be in direct contact with EPS. If direct contact is likely cables can be set in conduit or wrapped with tape.

Polystyrene - Back to top

Plastic material that can be produced by expanding a bead (EPS) or extruding (XPS). It is a totally inert foam material made by the polymerisation of styrene.

Profiled roof - Back to top

Roof which features a ‘crinkly pattern’, commonly used on warehouses, factories etc. These can be difficult to insulate. Jablite have a profiled roof system that allows panels to be cut to exactly fit the roofing profile. This creates a flat roof surface which is much easier to maintain – it also avoids the necessity to remove the existing roof thus avoiding business disruption.

PUR - Back to top

Polyurethane: Rigid foam insulation material. Normally used with a facer material to improve performance. Commonly used for cavity wall insulation in partial fill.

RDSAP - Back to top

Reduced Data Standard Assessment Procedure: used for existing dwellings where less data is readily available. RDSAP calculates the energy efficiency for space and water heating and also the CO2 emissions.

R-value - Back to top

Measure of thermal resistance used in the building and construction industry.  A higher R-value represents a better insulator.

SAP - Back to top

Standard Assessment Procedure: Government’s recommended method for measuring the energy rating of a residential dwelling. It is a calculation of typical annual energy costs for space heating, water heating and lighting and also calculates CO2 emissions. SAP has been used for checking new dwelling compliance to building regulations. A simplified version of SAP, RDSAP will be used to produce EPCs.

SEDBUK - Back to top

Seasonal Efficiency of Domestic Boilers in the UK: Industry standard for measuring the thermal efficiency of a boiler.

Tapered Roof - Back to top

Also known as ‘cut-to-fall’ roofs, insulation is used on the deck of a flat roof to improve water flow as well as to insulate. The roof is totally customised with panels assembled to a plan.

U-value - Back to top

measurement of heat transmission through a material or assembly of materials. The U-value is a gauge of how well the heat travels through a material. In construction terms the U-value is used to specify assemblies of components. Typically a wall would have a U-value as an assembly of components e.g. inner block work, cavity insulation, outer brickwork – whereas the performance of the insulation itself would have an R-value. U-values are measured in W/m2 (said ‘watts per square metre kelvin’). The lower the U-value, the better the thermal performance.

VCL - Back to top

Vapour Control Layer: used to prevent the passage of moisture through a building component