Our Systems and Products:- Timber Frame Systems
- Steel Frame Systems
- Roof Systems
- Floor Systems
- Thermoplan Ziegel Wall Systems
- EWI Masonry Wall Systems
- Pavadentro Renovation Systems
- Lime Plasters, Renders, Mortars
- Contract Eco Paints
- Natural Insulations
The Company Useful Information:
- NBT Seminars and Demonstrations at Ecobuild
- NBT Demonstrates Passivhaus Solutions at Ecobuild
- High Performance Homes Benefit From Sustainable Construction
- Severn Gorge Puts Trust in NBT
- NBT insulates ‘English building’ museum
- NBT insulates multi award winning Waingels College
- NBT insulates luxury Scottish countryside home
- NBT insulates award winning recyclable school building
- NBT insulates ‘Outstanding’ SusCon
- NBT insulates the UK’s first affordable certified Passivhaus
- NBT envelope succeeds at Expo
- NBT meets ‘Excellent’ criteria for One Brighton
NBT Selected for ‘Retrofit for the Future’ Programme
NBT has recorded multiple successes in the Technology Strategy Board (TSB) ‘Retrofit For The Future’ competition in which companies and consortia were invited to present high performing, sustainable refurbishment solutions which would reduce CO2 emissions by 80% in a specified social housing property. The TSB required that each proposal included the predicted refurbishment cost per tonne of CO2 saved, in order to demonstrate that the methodologies would be affordable in the mainstream construction market. NBT was involved in eight submissions put forward by a number of different groups.
The submissions included extensive use of NBTs natural woodfibre insulation products to achieve the required levels of CO2 reduction: Pavadentro, Pavaflex, and the recently launched Pavawall wood fibre insulation boards, as well as NBTs Baumit plaster and mineral render, and Siga adhesive tapes for sealing joints and connections to ensure effective airtightness.
A second phase of the competition required the successful organisations to present further proposals for the actual delivery of their methodologies. Designs were selected on the basis of their predicted cost per tonne of CO2 saved and whether their achievement of the target 17Kg/m2/yr CO2 production was deemed realistic. Three of the submissions NBT were involved in were selected to be delivered in real-life applications.
The delivery of two of these submissions will start in September, including the refurbishment of a 95-year-old house in a conservation area in Eltham. The consortium, comprising Hyde Housing Group, ECD Architects, Mears Group, and NBT Consult, faced the task of enhancing the thermal and acoustic insulation of the solid brick construction, whilst simultaneously preserving the property’s external character. Thus, they specified NBT’s 100mm Pavadentro internal wall insulation. NBT Pavatherm Profil will be used to insulate the floor of the property. The application of these high performing products is expected to achieve significant U-value reductions for the walls (2.01 to 0.36W/m2K), floor (0.61 to 0.25W/m2K), and pitched tiled roof (0.43 to 0.10W/m2K). In addition, the combined use of NBTs wood fibre insulation products and Siga airtightness tapes is predicted to achieve a reduction of air leakage levels from 7.2m3/hr/m2@50Pa to <3.0m3/hr/m2@50Pa.
The second submission due to be delivered in September specifies a variety of NBT products for the insulation of a 4-bed end terrace Victorian property in Ilford, which has a traditional solid brickwork construction. The consortium, comprising East Thames Group, ECD Architects, and the Breyer Group, specified 60mm Pavatherm Plus for insulation of the pitched tiled roof and 160mm Pavawall wood fibre board for external insulation of the front, rear and flank walls, finished with NBT mineral render. The use of NBT’s insulation products is expected to achieve significant U-value reductions for the walls (2.01 to 0.22W/m2K), floor (0.62 to 0.19W/m2K), pitched roof (0.40 to 0.11W/m2K) and flat roof (1.85 to 0.10W/m2K). An air leakage target of <3.0m3/hr/m2@50Pa will also be met, as a result of the combined use of NBT’s wood fibre insulation and Siga airtightness tapes.
For retrofit installations, the critical issue is the control of moisture both within the building fabric and in the house, particularly where internal insulation is used or where there are complex junction details. NBT building envelope systems are entirely breathable and, thereby, help to maintain optimal relative humidity within a building.
NBT Consult provided an extensive advisory design service for consortia entering the competition, through which they emphasised the importance of a holistic design approach to energy efficient construction. Balanced ventilation, summer overheating and thermal bridging are just a few of the crucial issues which need to be considered in order for a building to successfully deliver a low energy design.
