Bilco Smoke Vents and Hatches for Community Hospital
Access doors and hatches
manufacturer Bilco has supplied a roof
access hatch and smoke vent from its
recently improved range, which
provides increased thermal insulation
and reduced air leakage, to Brentwood
Community Hospital. The hatch and
vent are vital parts of the hospital’s fire
The Brentwood Community Hospital is
a new building on the site of a former
hospital. The two-storey building
includes a 50 bed inpatient ward as well
as outpatient and radiography facilities.
Bilco has supplied a 1,000 by
1,250 mm EW-50 REM smoke vent and
a 915 by 760 mm S-50T roof access
hatch, with its LadderUP Safety Post,
which will provide a secondary means
of escape from the flat roof area.
All hatches supplied by Bilco are now
being fitted with 50 mm thick faced
rigid polyisocyanurate insulation board
on both the cover and the curb. Super
TUFF-R has a component U value of
0.47 Wm2/K and is ideally suited to
accepting a variety of roofing
adhesives. It is made with hydrocarbon
blowing agents to ensure that its
manufacture does not deplete the
Earth’s atmospheric ozone layer.
Hatches are now also all fitted with a
newly designed closed cell EPDM
sponge gasket to help meet Building
Regulation air leakage targets by giving
a better seal of the cover to the curb.
Independent tests have shown that the
maximum air permeability performance
at pressures up to 600 Pascals is less
than 4.83m3/hour/m2 – giving the
hatches a Class 1 rating under
BS EN 12207:2000.
The modifications will help architects
and engineers meet the requirements
of Part L of the Building Regulations.
The acoustic, thermal and air leakage
performance of the hatches – as well
as their resistance to wind and snow
load and to impact – has been
independently verified by tests at
Taylor Woodrow’s technology centre in
Bedfordshire. Bilco can provide full
test results for inclusion in building
The design of hinges and other
features ensures that the hatches are
resistant to the effects of ageing and
weather in exposed locations.