Insulation; Heating & renewable energy

achieve U-values of 0.11 W/m².K; 0.15 W/m².K; and 0.21 W/m².K. Four different window layouts were also considered. ADFs were generated for each scenario. Te ADF calculations assume a 2.8 m high internal space with a facade width

of 5 m and a depth of 3.5 m. Te calculation plane was positioned at 0.7 m above ground level with the exclusion of a border zone of 0.5 m from the walls. Te internal reflective properties of the room were 30 per cent for the floor (dark grey carpet), 70 per cent for the walls (light grey paint) and 80 per cent for the ceiling (white paint). No other buildings, obstructions, or furniture were considered.

INSULATION RESEARCH Te advantages of fitting higher performing insulation materials are well understood. By fitting insulation materials with better thermal conductivities, it is possible to minimise the construction thickness and weight required to achieve the desired thermal performance for that element (U-value). What is less well known is how the thickness of external walls, and therefore window reveals, can impact daylighting. Kingspan Insulation commissioned Peutz BV to assess how different

insulation constructions could affect internal natural light. Te research compares two rainscreen build-ups — one insulated with

phenolic insulation (with a thermal conductivity of 0.020 W/m.K), the other with mineral fibre insulation (with a thermal conductivity of 0.035 W/m.K). Each build-up was assessed in three different configurations designed to

RESULTS In all four window arrangements, the phenolic constructions, had a higher ADF than those with mineral fibre with the percentage improvement ranging from 10.6 per cent to 63.2 per cent. In addition, all results for the phenolic constructions exceeded the minimum daylighting criteria from BS 8206-2: 2008 (Lighting for buildings. Code of practice for daylighting) for bedrooms and living rooms. Te maximum ADF for the phenolic constructions was 5.132 per cent, far below the level of six per cent at which BR 209 suggests overheating may become an issue. All other results were below the ideal maximum of five per cent. Te phenolic construction therefore provided a slimmer and more effective

approach to achieving both thermal comfort and improved daylighting than the comparative mineral fibre construction.

BETTER HOUSING Good daylighting provision can transform internal spaces making them not only healthier but also more visually appealing to prospective house buyers. It makes sense, therefore, for developers to consider techniques and approaches which may help to easily deliver this. Specification of highly thermally efficient wall insulation is one option to achieve this while simultaneously raising the fabric performance of the property.

A change of scenery with Kingspan

Kingspan Kooltherm K108 Cavity Board has been installed on the first phase of houses constructed in the major redevelopment of The Poets in Swinton, helping the project to meet its thermal performance requirements with slim wall build-ups. 5mm Kingspan Kooltherm K108 Cavity Board was installed behind traditional red stock brickwork facades. Part of Kingspan’s premium performance Kooltherm K100 range, the insulation board features a fibre-free phenolic core with an outstanding thermal conductivity of 0.018 W/m.K. This excellent performance enabled the target external wall U-values to be met without the need for thicker insulation which would encroach on living space.

01544 387 384 Combi-repair kit – from FLAMCO

The Flamco T-plus is a key part of the Combi Repair Kit from FLAMCO.

Replacement expansion vessels in combis can be expensive and few contractors will carry all the spare parts required to get all makes of combis up and running quickly. An option is to mount a new expansion vessel on the wall close to the boiler and connect a filling loop using a Flamco T-plus.

For more information head for FLAMCO’s website or see how they work by visiting Flamco’s You Tube channel. 42 | HMM September 2018 |

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