Protection from all the elements - Fire, hurricanes and cyclones
and temperature.
Produced from inert gypsum plaster,
Hamannwall
has a 1 hour fire
rating when unfilled or a 4 hour fire rating when filled with
concrete.
By using a simple tie down system, the roof is secured through
the cavity of the wall to the foundation giving it significant
protection against high winds.
Further,
Hamannwall
has a high thermal insulation and when the
hollows are filled with insulation even greater thermal
properties are achieved.
In his thesis, Ecologically Sustainable Development - Approaches
in the Construction Industry, Robert Omahen, University of
Regensburg concludes that:
"Hamannwall
offers huge savings in embodied energy - 66% for
domestic buildings 40% for
commercial buildings."
He further states that,
Hamannwall
uses "fewer raw materials but
doesn’t compromise on load bearing capability and the total CO2 saving
of
Hamannwall, for residential dwellings in Australia would be
about 63% or 3.91 million tonnes compared to brick."
The manner in which
Hamannwall
is manufactured means that both
sides, the internal and external surfaces, are finished to a
very high quality thereby dramatically reducing construction and
finishing time.
Furthermore, the clean dry construction process eliminates the
need for bricklaying and most plastering.
More cost effective than other building products
The following chart is based on the construction of a 130m2 demonstration
house in Mumbai, India.
|
Materials used |
Hamannwall Building |
Conventional Building |
Saving in % |
|
Cement |
16
tones |
32.55 tones |
50.8 |
|
Steel |
1800 kg |
2779 kg |
35.2 |
|
River sand |
20
m3 |
83.37 m3 |
76 |
|
Granite metal |
38
m3 |
52.46 m3 |
27.56 |
|
Bricks |
- |
57200 |
|
|
Hamannwall |
500m² |
- |
|
|
Water |
50000lt |
200000lt |
75 |
|
Built Area |
143m² |
154.45m² |
8 |
|
Labor |
389 man days |
1200 man days |
67.59 |
|
Construction Time |
21 days |
120 days |
82 |
|
Total Weight of super structure |
170 tones |
490 tones |
65 |
|
Construction Cost |
$US
26,800 |
$US 36,980 |
27.5 |
|
Embodied energy in kWh |
82921 |
215400 |
61.5 |
|