OVERVIEW
he NHS Trust commissioned Breath Energy
to review its estate, recommend and manage
a programme of works to significantly reduce
energy costs and CO
2
emissions.
Central to the works was the external upgrade
of the main Epsom Hospital premises, the Wells
Building, to improve thermal performance and
address failings in the building fabric. The existing
roof areas had failed and were allowing water
ingress, potentially not only damaging the building
fabric and energy efficiency but essential hospital
equipment.
Langley’s project team had to devise solutions
that enabled the whole building exterior- facades
and roofs – to be upgraded while the seven-
storey hospital remained operational. Added to
the complexity, the project began while Covid-19
restrictions were in force.
Our solution:
Detailed roof surveys prior to work commencing enabled
us to identify potential problems and advise on effective
solutions in advance.
We recommended full strip-up of the roofs, as the existing
had perished beyond economical repair. We advised new
construction with TA-25 W Flat Roofing System on the
main roof, stairwell roof and plant room areas. The TA-
25 system is independently certified by the BBA (British
Board of Agreement) confirming Broof (t4) classification.
It also has LABC assured accreditation to provide support
with regard to building control. The inclusion of insulation
meant the new roof achieved the current requirement of
0.18W/m2K.
While a full strip-up of the two terraces and balcony
would also have been the preferred solution, the depth
of work would have been impractical as the hospital’s
operating theatres were below, and in use. Our solution
was to remove the existing top layer and replace with PC-
20W Liquid Roofing System and install breather vents to
address moisture within.
TA-25 W Flat Roofing System
Salisbury Walk
Allenby Barracks
Jesus College
Waverley Court
Allenby Barracks
Jesus College
Waverley Court
Colchester County High School