TECHNICAL INFORMATION SHEET 2THERMAL INSULATION

METHODOLOGY

Thermal resistance determined by calculation undertaken in accordance with BS EN ISO 6946:1997, withbubbles approximated to cubic shape with same area and aspect ratio in accordance with this standard.

Calculations independently undertaken by Jersey Energy, Services and Energy Consultants

COMPARISON WITH SOLID SLABS

While BubbleDeck slabs are not designed to provide thermal insulation due to encapsulation of the airbubbles within the centre of the concrete slab, the technology achieves between 17% to 39% higher thermalresistance than an equivalent solid slab of the same depth. BubbleDeck slabs can therefore make a usefulcontribution towards the thermal insulation achieved by the overall construction.

THERMAL RESISTANCE VALUES

BubbleDeck SlabType

Thickness BubbleDeckThermal Resistance

m2k/W

Solid SlabSame Thickness

m2k/W

BubbleDeckPercentage

ImprovementBD 230 230mm 0.1546 0.1111 39%BD 280 280mm 0.1847 0.1375 34%BD 340 340mm 0.2102 0.1659 27%BD 390 390mm 0.2325 0.1905 22%BD 450 450mm 0.2583 0.2205 17%

CONDENSATION RISK

Designers attention is drawn to the fact that non-insulated concrete slabs forming part of the external buildingenvelope can produce cold surfaces where certain conditions, dependant upon the relative humidity and dewpoint, may result in formation of condensation. It is recommended a condensation risk analysis is undertakenwhere BubbleDeck slabs form part of the external building envelope.

BubbleDeck C.I. Ltd. can undertake this analysis upon request and being given full details of the overallconstruction materials and thickness specification.

© BubbleDeck C.I. Ltd.TIS-2 Issue 01May 2005

BubbleDeck C.I. Ltd.White Lodge,Wellington Road,St. SaviourJERSEYChannel IslandsJE2 7TE

Tel: +44 1534 725402Fax: +44 1534 739115E: Enquiry@BubbleDeck-CI.comWEB: www.BubbleDeck-CI.com