2.2. Ley de Ingresos de la Federación
2.2.2. Fundamento
Figure 24: Inverted Warm Deck Roof68
3.5. Floor Insulation
Floor insulation is the process of adding the insulation layer under the floorboards. This type of insulation assists to control the heat transfers from the floor and ground. Furthermore, this insulation promotes the level of draught proofing by covering the draughts through the floorboards and skirting boards69.
3.5.1. Floor Insulation Methods
These are four methods for concrete floor insulation regarding to the process of rehabilitation.
3.5.1.1. Upgrading an Existing Slab
The easiest method for improving the level of floor insulation in existing floor is appending the insulation layer above the existing floor, the insulation which is covered by the new deck.
Although, this method is easy, it makes some serious problems associated with the fixed furniture in the home because the height of the floor will increase after performing this kind of insulation70.
Figure 25: Upgrading an Existing Slab71
The below table shows the advantage and disadvantage of this method:
68 http://www.greenspec.co.uk/timber-flat-roof-insulation.php, Date accessed: 26.06.2013
69 http://www.thegreenage.co.uk/tech/floor-insulation/, date accessed; 26.06.2013
70 http://www.greenspec.co.uk/ground-floor-insulation.php, Date accessed: 26.06.2013
71 Ibid, Date accessed: 26.06.2013
29 Upgrading an Existing Slab
Advantage The simplest method for promoting the level of floor insulation
Disadvantage Can create the serious problems about the fixed furniture of the building.
Table 13: Advantages and Disadvantages of Upgrading an Existing Slab72
3.5.1.2. New Slab – Insulation above Slab
This is another alternative for improving the level of floor insulation. In this method, a layer of screed or board is joined above the insulation layer, the layer which is located on the new slab.
The screed and board have some advantages and disadvantages. The screed is better in the thermal insulation process rather than the board. On the other hand, the installation of the board is quicker rather than the screed. In this system, it is able to
insulate the gap between the screed and board
and walls as to decrease the thermal bridging. Also, in this system by using the sealant, it is able to control the air leakage73.Figure 26: New Slab – Insulation above Slab74
The below table shows the advantages and disadvantages of this method:
New Slab – Insulation above Slab
Advantages 1. The time for heating the building becomes shorter comparing the other kinds of floor insulation.
2. The place of insulation can be exploited for under floor heating systems.
72 Ibid, Date accessed: 26.06.2013
73 Ibid, Date Accessed: 26.06.2013
74 http://www.greenspec.co.uk/ground-floor-insulation.php, Date accessed: 26.06.2013
30
Disadvantages 1. From the technical view, it is important to consider the loads
which must be borne by the insulation layer.
2. In the wet space such as bathrooms and toilets, this kind of insulation is not suitable.
Table 14: Advantages and Disadvantages of New Slab - Insulation above Slab75
3.5.1.3. New Slab – Insulation below Slab
This is another system in order to improve the thermal insulation of the floor. Unlike the previous system, in this system, the insulation layer is located beneath the new slab and there is no screed or board. Like as the previous system, this system can assist to reduce the
thermal bridging by filling
the gap between the new slab and the walls. The mechanism of the controlling the air leakage is the same as the previous system76.Figure 27: New Slab - Insulation below Slab77
The below table shows the advantages and disadvantages of this method:
New Slab – Insulation below Slab
Advantages 1. It is possible to use the insulation layer with the less thickness than the above slab.
2. It has the better situation about the load spreading rather than the above slab.
75 Ibid, 26.06.2013
76 Ibid, 26.06.2013
77 http://www.greenspec.co.uk/ground-floor-insulation.php, Date accessed: 26.06.2013
31
Disadvantages The quickness of heating in this system is less than above slab
system.
Table 15: Advantages and Disadvantages of the New Slab - Insulation below Slab78
3.5.1.4. Suspended Timber Floor
Suspended timber floor is the floor which is installed above the floor with known distance from it. In other words, there is gap between the existing floor and the one which is installed as the new floor. The insulation layer is located between the joists of the floor so as to decrease the rate of heat loss. The main problem about this floor is the air leakage. It is necessary to consider this subject and solve this problem by employing the sealant in the suitable position. Insulation layer must cover all edges of the floor and the place close
to the floor installation place. Also, like as
other insulation system, it is important that insulation covers the skirting gaps and draughts. The ventilation below the floor deck is another problem that can lead to reduce the efficiency of the insulation layer79.
Figure 28: Suspended Timber Floor80
The below table shows the advantages and disadvantages of this method:
Suspended Timber Floor
Advantages 1. The insulation layer assists to minimize the time which is needed for heating
2.
From technical view, the extra load must be born by the lateral components is in minimum state.
78 Ibid, Date accessed: 26.06.2013
79 http://www.greenspec.co.uk/ground-floor-insulation.php, Date accessed: 26.06.2013
80 Ibid, Date accessed: 26.06.2013
32
Disadvantages 1. There is no thermal mass about this system
2. There is serious problem about air leakage
3. Ventilation below the floor decreases the efficiency of the insulation layer
Table 6: Advantages and Disadvantages of Suspended Timber Floor81