Number 10 Downing Street, London

In the 1980s, when Margaret Thatcher was Prime Minister, Kershaw Contracting Services, then known as Freeman Insulation and prior to joining the Kershaw Group, was appointed to install loft insulation into Numbers 10 and 11, Downing Street, central London.

Downing Street has been recognised as the centre of Government since the early 1800s and Number 10 has been the permanent residency of the Prime Minister since Arthur Balfour was appointed to the position in 1902. The origins of Number 10 go back to the late 1600s, with the house that stands on the spot today starting to take shape in the late nineteenth and early twentieth century. Since then it has undergone many alterations and programmes of work to maintain it as a modern day building, fit for purpose. Number 11 has been the residence of the Chancellor of the Exchequer since 1828.

Freeman Insulation completed the insulation installation works on Number 10 and Number 11 Downing Street over two weekends, using a team of six due to the vast size of the loft spaces. At each house, the process entailed removing polystyrene boards, then injecting Rockwool blown insulation in-between the roof joists which required a hose to be fed in through an upper window and up through the loft hatch on the top floor. Rockwool roll insulation was also applied to some of the horizontal areas.

Ray Segrave, a member of the team that carried out the installation explained "We arrived a little early on the first day at Number 10 so we saw Margaret and Dennis Thatcher leave as we were waiting to gain access." He added "In those days, there was still public access along Downing Street, and every time one of us went out to the van for something, we would have our photo taken by tourists!"