The insulation of foundations and insulation of the roof of your home will enable it to withstand cold or excessive heat, maintaining a comfortable temperature, without exorbitant energy bills. Depending on the configuration of your home, such losses may be on the order of:
* 17% from the walls above ground;
* 15% by the walls of the basement and foundation floors;
* 11% through the roof.
Poor insulation can also be the cause of various problems such as the presence of cold floors or walls, condensation at the bottom of the walls or even the appearance of traces of mold. Insulating your home can thus make all the difference.
How To Insulate And Which Materials To Choose?
There are various types of insulation material: rigid insulation, batt, loose, and injected foam. To be effective, an insulation material must:
* Uniformly fill the cavity to insulate;
* Resistance to heat transfer;
* Be sustainable;
* Withstand moisture (in some cases).
The thermal resistance value or R-value (RSI, in the metric system) shows the performance of an insulation material. The higher the R or RSI value, the more the material resists heat transfer. There are strict regulations around insulation and we always strive to exceed these.
Moreover, it is a good insulator. However, regardless of the chosen insulation, installation must be impeccable, since the thermal resistance of the assembly in which it is located depends on it. In addition to account for its thermal resistance (R) and the cost associated with it, the choice of insulation must first and foremost be based on the use for which it is intended, as the insulating materials are not necessarily suitable for all types of assembly. For example, some materials may not be suitable for insulating a basement, but very well do the trick for an attic.
Is Your Home Well Insulated?
You have projects of construction or renovation in sight? Here are some important points to consider when you work:
* Insulate your home from top to bottom to eliminate cold floors, condensation and mold growth, while helping to reduce heating costs.
* Pay special attention to structural elements at a construction or renovation, to ensure that they are covered with an insulating material placed continuously over their full surface.
* Make sure that the insulation is laid continuously so as to cover all joints and junctions between components such as transitions between walls, ceilings and floors in contact with the outside air, the ground or an unheated adjacent space.
Insulation works when well planned and executed during your construction or renovation projects and allow you to improve your comfort and reduce energy consumption at the lowest cost.
How To Insulate A Concrete Basement Wall?
The following paragraphs provide some guidelines for the insulation of the foundation walls, as the insulation is made from inside or outside. Materials used will depend whether you are applying them to an existing structure or a new construction job. Please contact us for more details.
Choose Thermal Barrier On The Inside Or The Outside?
Although it allows to improve the energy efficiency of housing, insulation of the foundation wall from the inside does not benefit from the thermal mass of the concrete, in addition to reducing the interior floor space (thickness insulation).
Furthermore, insulating or increasing the insulation of a foundation wall from the inside, increases the risk of frost. In this sense, if the soil is moist and that the foundation is near the level of soil freezing, it is better to leave an uninsulated space at the base of such wall that heat of the building can be transmitted to the soil adjacent.
Nevertheless, the interior insulation is well suited to the case of existing homes that do not require external excavation, since it is a more accessible method, less expensive and feasible in any season.
Note that only waterproof concrete foundations and well-drained should be insulated from the inside. To this end, it is important to check for cracks that may be the source of water infiltration from outside. Moisture from condensation during the summer is usually manifested by a black deposit at the base of the wall, while infiltration from outside can be detected by the appearance of white deposit (mineral salts) to the surface concrete.
If you detect water or moisture infiltration problems that cannot be settled inside, we will then make the corrections from the outside. If necessary, this could even be the perfect opportunity to perform insulation work from the outside.
Insulate The Interior
For the insulation of a foundation wall from the inside, the use of a moisture resistant insulation is highly recommended. The rigid Styrofoam insulation type 3 or 4 is the example of the most commonly used material for this purpose. As it is a combustible material, however it is important to cover it with a firewall to meet the level of fire resistance required by the applicable building code. Mineral wool or glass wool also gives good results in the condition of being protected by a waterproof membrane.
The total thermal resistance of a foundation wall should be about RSI 3.0 (R-17) for the complete assembly. Several technical and material combinations can achieve this level of insulation. The use of a rigid extruded polystyrene insulation having a thickness of 76 mm (3 in), or the use of a polystyrene type 3 or 4 having a thickness of at least 25 mm (1 inch ) combined with mineral wool mat of 89 mm (3½ inch) thick (R-12 wool), installed inside two-by-four timber (5 by 10 cm), are two of the technical most commonly used to achieve this goal.
Insulating From The Outside
When the repair of the perimeter drainage is required, it may be advantageous to isolate the foundation from the outside. Recall that the stone foundations and concrete block foundations must be insulated from the outside. In addition, the exterior insulation allows you to enjoy the thermal mass effect of the concrete, which should provide a better balance of indoor temperature.
After digging foundations to the wheelbase, it is suggested to use a rigid polystyrene insulation type 4, with a minimum thickness of 76 mm (3 in) along the entire height of the wall. It is necessary to protect the insulation from the sun. The use of a moisture barrier and a granular backfill quality ensure dry foundations.