Chantry Hall
The Rå Build method - with the inner leaf, first floor and roof installed ahead of the external leaf - offered many advantages.
The homes were required to achieve level three in the (now superseded) Code for Sustainable Homes and the excellent acoustic, thermal and air tightness characteristics inherent with this type of construction contributed greatly towards this. The speed of build was another important factor and the Rå Build method gave impressive time savings over other construction techniques.
All the external finishes are of a traditional appearance in keeping with the surrounding area.
External walls - Cavity construction using H+H Thin Joint system with Jumbo Bloks (610 x 270 x 100 and 110mm thick) and Celfix Thin Joint mortar for the inner leaf, with either brick, flint or clad aggregate blockwork for the outer leaf.
With 60mm Kingspan rigid insulation, 50mm residual cavity and an internal finish of 12.5mm plasterboard fixed using dabs, the external walls provided
average U-values of 0.21W/m2K.- Separating wall - 2 leaves of 115mm Jumbo Bloks Thin Jointed with Celfix mortar, 75mm cavity fully filled with Isover RD Party Wall Roll acoustic insulation. Finished with 12.5mm plasterboard on dabs both sides. To improve the acoustic performance still further, cavity ties were omitted.
- Internal partition walls - 63mm timber studs infilled with insulation and finished with 12.5mm plasterboard both sides.
- Ground floor - H+H Beam & Block flooring system with grouted joints. In keeping with the approach of avoiding wet trades and taking advantage of the very flat system, floor boarding was installed over Kingspan insulation.
- Foundations - Strip footings with 2 courses of Celcon Foundation Blocks to dpc level.