2. What is Thermal Insulation
Thermal insulation is the method of preventing heat from escaping a Building or from
entering the Building.
The thermal insulators are referred to materials used to reduce the rate of heat transfer.
Convection: Convection is the transfer of heat energy in a gas or liquid
The heat can be transferred by 3 mechanisms:
by movement of currents.
Conduction: Conduction is the transfer of energy through matter
from particle to particle.
Radiation: Electromagnetic waves that directly transport ENERGY through
space. Sunlight is a form of radiation that is radiated through space
to our planet without the aid of fluids or solids.
3. Why Insulate Buildings?
Cold Climate: In cold conditions, the main aim is to
reduce heat flow out of the building, to keep living
space warm.
Hot Climate: In hot conditions, the greatest source of
heat flow is solar radiation. The aim is to reduce the
Technical:
Thermal insulation is the method of preventing heat from escaping a Building
or from entering the Building.
heat flow is solar radiation. The aim is to reduce the
flow of heat inside the building.
“Go Green – Plan for a better tomorrow”.
Use Energy as efficiently as possible.
The use of thermal insulation in building walls and roof
does not only contribute in reducing the required
air-conditioning/ heating system size but also in
reducing the annual energy cost.
Environmental:
Economical:
It saves up to 35 to 40% on your
electricity bills
4. Why Extruded Polystyrene For Thermal Insulation
The process of extruding foamed polystyrene results in a material with uniformly small,
closed cells, a smooth ‘skin’ and an unrivalled set of properties which make it the choice of
specifiers in a wide range of demanding insulation applications.
The following
properties makes
Extruded Polystyrene
an ideal choice for
thermal insulation:
4. Chemical Resistance:
XPS is resistant to many
common chemicals such as:
acids, bases, water and water-
based paints, alcohol and
alcohol-based paints, brine or
salt water, cement and mortars,
asphalt, etc.
1. R- Value:
The ability of an insulation to resist
heat flow. The higher the R-value, the
greater the insulating power. XPS has
excellent long term R-value and proven.
2. Mechanical Properties:
High and uniform
compressive strength.
3. Moisture Resistance:
The superior moisture resistance
and very low vapour permeability of
extruded polystyrene insulation
provides outstanding benefits for
most construction and engineering
applications.
asphalt, etc.
5. BITUMAT - BituTherm
Description:
Bitumat BituTherm is a thermal insulation
material in form of rigid boards, made of
polystyrene, a derivative of petroleum by using
the extrusion method. The boards have a
closed-cell structure and therefore they are
resistant to water and humidity. They have
excellent thermal insulation and compressiveexcellent thermal insulation and compressive
strength property.
Specifications:
Dimensions BituTherm
Thickness 25, 40, 50 & 75 mm
Board Size 1250mm x 600 mm
Edge Profiles Shiplap
Surface Smooth
7. Application Fields
Bitumat BituTherm is utilized for
the thermal insulations of:
Flat roofs, either accessible or inaccessible, as
inverted roof construction.
Roof Gardens.
Flat roof parking decks.Flat roof parking decks.
Exterior walls of buildings insulated either on
the inner or outer face.
Below-grade exterior walls of basements
(Perimeter insulation).
On-grade floors of buildings.
Cold store insulations.
9. Inaccessible Flat Roof Insulation
No. Roof Assembly Details
1 Reinforced concrete slab
2 Sloping screed
3 Bitumat Modified Waterproofing
membrane
4 Bitumat “BituTherm R”
Insulation Board
6
5
4
7
5 Separation Layer
6 Ballast
7 Parapet
1
3
2
Sloping screed prepared preferably with porous aggregate for the lightness, is laid over the reinforced concrete
floor and a leveling concrete is applied over it.
Bitumat Modified Waterproofing membranes are adhered to the leveling concrete by torching.
BituTherm XPS board is laid loose over the waterproofing membrane with the shiplapped edges closely butted.
A non-woven geo-textile is applied loose as a separation layer.
Ballast of round and light colored gravel is laid as the final layer which serves for the protection of the system.
10. Accessible Flat Roof Insulation
No. Roof Assembly Details
1 Reinforced concrete slab
2 Sloping screed
3 Bitumat Modified Waterproofing
membrane
4 Bitumat “BituTherm R”
Insulation Board
6
5
4
7
Insulation Board
5 Separation Layer
6 Paving slabs/ Tiles
7 Parapet
1
3
2
Application of the layers in accessible flat roof insulation is the same as the inaccessible, starting
from the bottom and including the separation layer.
Paving of slabs or tiles using mortar and sand.
Paving slabs serves as the protective layer against UV radiation and they form the load against the
uplift of wind.
The minimum thickness of paving slab should not be less than 4 cm.
11. Roof Garden Insulation
No. Roof Garden Details
1 Reinforced concrete slab
2 Sloping screed
3 Bitumat Modified Waterproofing
membrane
4 Bitumat “BituTherm R”
Insulation Board
5 Separation Layer
6 Ballast
6
5
4
7
8
9
6 Ballast
7 Separation Layer
8 Soil
9 Parapet fixing
1
3
2
Application of the layers in roof garden insulation is the same as the inaccessible, starting from the
bottom and including the separation layer.
A 2nd separation layer of the non-woven is laid over the ballast layer and the application is
completed by laying the soil over it.
Care should be taken to slope the screed such that it should not be disturbing for the people using
the roof garden.
12. Car Park Flat Roof Insulation
No. Roof Assembly Details
1 Reinforced concrete slab
2 Sloping screed
3 Bitumat Modified Waterproofing
membrane
4 Bitumat “BituTherm R”
Insulation Board
6
5
4
7
5 Separation Layer
6 Paving slabs/ Tiles
7 Reinforced concrete slab
1
3
2
Application of the layers in Car park flat roof insulation is the same as the inaccessible, starting
from the bottom and including the separation layer.
It is advisable to prepare sloping screed with normal aggregate instead of porous aggregate and
add some reinforcement for load bearing purpose..
Reinforced concrete of estimated thickness and reinforcement is cast over the ballast layer.
13. “BituTherm W”
Exterior Wall Insulation
Bitumat “BituTherm W” is used for thermal insulation of exterior
walls, applied either on the outer or inner face of the wall,
especially under plaster gypsum board.
14. Outside Insulation of Exterior Wall
No. Wall Insulation Details
1 Exterior Wall
2 Fixing Mortar
3 Plastic Anchor
4 Bitumat “BituTherm W”
Insulation Board
5 Undercoat Plaster
1
6
5
4
3
2
7
5 Undercoat Plaster
6 Reinforcement Mesh
7 Undercoat Plaster
8 Plaster Finish
BituTherm XPS board is applied on the surface of the wall temporarily by fixing mortar and then
fixed by using plastic anchors. 5 anchors per board are sufficient.
After applying the 1st layer of undercoat plaster, the reinforcing mesh is adhered to it and
stretched throughout the surface to be plastered.
The 2nd layer of undercoat is applied over the mesh and completed with plaster finish.
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15. Inside Insulation of Exterior Wall
No. Wall Insulation Details
1 Exterior Wall
2 Fixing Mortar
3 Plastic Anchor
4 Bitumat “BituTherm W”
Insulation Board
1
5
4
3
2
Insulation Board
5 Plaster or gypsum board
Insulation of exterior walls with BituTherm XPS board from the inner face is preferred sometimes
for buildings which are not possible to insulate from the outer face like renovations of historical
buildings.
It is advisable to use mesh as reinforcement to prevent probable cracks of plaster at the board
joints.
The insulation is completed by applying plaster or gypsum board. .
16. Below-Grade Exterior Wall Insulation (Perimeter Insulation)
No. Basement Insulation Details
1 Basement Wall
2 Leveling Plaster
3 Bitumat Modified Waterproofing
membrane
4 Bitumat “BituTherm W” XPS
Insulation Board
1
5
4
3
2
Insulation Board
5 Protection Wall
6 Back Filling
The Insulation of below-grade exterior walls of basement, BituTherm board is applied loose over
the waterproofing membrane protects the membrane from possible damage along with thermal
insulation to the basement of the building.
Protective wall is erected to hold the insulation boards in place and back filling.
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