The Pavaclad and Diffutherm wood fibre board insulation systems from specialist Natural Building Technologies has been specified for the Park End Street development in Oxford.
Fitted to the exterior face of the walls and roof of the apartments, and finished in a range of cladding materials including terracotta tiles and render, the systems were designed with energy efficiency in mind. As they are installed on the building exterior, they minimise thermal bridging and improve airtightness levels to further enhance the thermal performance of the building.
An interlocking block wall system has been produced by Natural Building Technologies that is fast and economical to build.
The ThermoPlan system is suitable for external or internal solid walls and offers thermal performance even though the block is lightweight.
As well as using a thin bed joint system of interlocking block, a semi-automatic system is available to provide an even layer of mortar. The blocks are fired and planed with a K value of 0.11, meeting Part L regulations.
Utilised on Hastings Media Centre are products from Natural Building Technologies. The walls were designed with a u-value of 0.21W/m, which was achieved using Diffutherm 80mm Woodfibre board on a 100mm timber frame with Sheepswool insulation between the timber studwork.
Boards were rendered with a lime based render first coat and finished with a decorative coloured top-coat and equalising paint. With an ecological profile, thermal and acoustic insulation is also achieved.
Sustainable building products specialist Natural Building Technologies has produced the NR1 system - an ecologically sound roofing system for new buildings.
The thermal part of the system focuses on the twinned use of wood-fibre insulation boards over rafters, with natural fibre insulation batts, or mechanically injected cellulose fill under them.
The boards are manufactured from waste pine wood, are fully interlocking, airtight, breathable, and eliminate the requirement for membranes or ventilation of the roof space.
It has thermal insulation with a U-value of 0.19 W/m?K. The construction has low embodied energy, low CO? emissions and can be composted too.
Zeigel Building Blocks, from Natural Building Technologies, are a thin joint system that creates a solid, load bearing wall that exceeds the latest building regulations. The company claims that they are environmentally 'green' with good thermal and acoustic properties for both external and internal solid walls. Made from fired clay in a honeycomb design, the blocks allow a single skin 'vapour open' building.
Reducing overheating in the summer, as well as preventing heat loss, NBT's Woodfibre building insulation boards are designed to add considerable mass to a lightweight construction. Three systems are available, all of which offer high thermal insulation, and, the company claims, despite being part of a 'light weight' style construction, they provide significant thermal mass to the building. The boards also provide moisture control and regulation due to their vapour permeability hygroscopic and capillary qualities. Condensation problems can be significantly reduced and, due to the high mass, good acoustic performance is also achieved.
Made from hemp and recycled cotton fibres, NBT has launched Isonat, a natural, high-insulation material. With a thermal conductivity of 0.039 W/mK the new insulation batts can absorb and release moisture without significant loss of thermal resistance. The new insulation can be used in lofts, within wall and under floors and will reduce the transmission of airborne and impact sound.
To meet the growing demand for ecologically sustainable plasters, Natural Building Technology (NBT) now supply two separate ranges of plasters, one clay and one lime based. Colours include blue, green, grey, orange, red and yellow, but they all are designed to offer a designer-quality finish to a room without the need for paint or further decoration. The company?s clay Bayosan and Claytec plaster ranges are fully ?breathable? and provide a rapid response to changing internal conditions with their capacity to absorb moisture. This reduced the likelihood of the problem of ?sick building syndrome?.