Church Of Our Lady, St. Johns Wood, London
The proposed floor construction for the Church Of Our Lady was developed in conjuction with the architect Francesca Weal. Rather than removing the existing floor it was proposed to install a secondary floor level at approximately 150mm above it. This provided a natural void to install essential insulation as well as new electrical services. The new floor structure consisted of a 22mm ply structural floor deck supported on large fixed floor joists set at 400mm centres. This provided us with a flat and level substrate on which to install the underfloor heating system.
Following fantastic preparatory work by the contractors RJM Builders, we were faced with a perfect substrate on which to lay the panel based underfloor heating system from JUPITER.
As with all the churches we heat, we installed the 30mm thick Edge Zone heating pannels which allowed the pipes to be installed at 125mm pipe centres throughout. This ensured superior output.
The two manifolds for this project were installed beneath the finished floor in the crypt. Flow and return pipework therefore was brought up to the main area through apertures created in the floor. The manifolds, mixing valves and pump sets were controlled by the wireless Danfoss CF2 system which allowed for both manifolds to be networked and controlled by a central programmable remote control.
Being a dry and clean installation, the installers would clear the site at the end of the working week and board over the underfloor heating panels with ply sheet so that the church could be used for services at the weekend. This was one of the conditions of the contract.
The Screed Replacement Tiles were brought in packs and laid out in readiness for installation.
Once laid, the tiles required only 36 hours before the finished floor could be installed and the heating system turned on.
The finished floor tiles were installed without any movement joints over the whole area. A small 8mm gap was left however against perimeter walls and columns as shown here.