thermal insulation
Rebated PIR insulation guarantees a warm roof, the best insulation and a very resistant material that is easy to install
How to choose the right insulation?
The thermal performance criterion
All insulation materials are characterized by the Lambda coefficient (λ) of thermal conductivity and the R coefficient of thermal resistance. When the conductivity decreases the resistance increases and conversely when the conductivity increases the resistance decreases. A good insulator therefore has a low coefficient of conductivity and a high coefficient of resistance.
The performance of the material and the insulation also depends on the finishes of the product and the installation method chosen. Straight-edged single-finish insulation boards are less effective than shiplapped or tongue-and-groove finishes. Straight edges can leak air between panels if they are not held tightly together. Panels with rabbeted or tongue-and-groove edges fit together perfectly and form an airtight assembly, so there is no heat loss.
The glued laying method is optimal because the insulating material is not pierced by fixing elements which inevitably create thermal bridges. The plastic screw guards supposed to prevent the thermal bridge are totally useless, they only enlarge the hole in the insulating material and change absolutely nothing to the excellent thermal conductivity of the screw.
EPDM-TPO exclusively markets PIR insulation with high performance thermal resistance. All the panels are rabbeted or tongue-and-groove to respect the performance of the insulating material, the methods of installation by gluing or ballasting do not create thermal bridges. The insulation of your roof is optimal.
The installation method for your flat roof
In the EPDM-TPO warm roof system, your PIR insulations are either glued or ballasted.
The bonding is carried out on the self-adhesive vapor barrier with polyurethane mastic, easy to implement, the EPDM membrane will then be bonded to the insulation panels, with neoprene glue, or with acrylic glue only on the surfaced insulation glass veil.
The ballast is carried out after the installation of the EPDM waterproofing on the insulation. The PIR insulators are assembled on the self-adhesive vapor barrier, the EPDM membrane is placed on the layer of PIR insulators, fixed at the foot of the parapet, glued to the upstands. The EPDM membrane is then protected by an anti-puncture geotextile felt. Finally, on the protective felt, the ballasting by vegetation, rolled gravel or slabs on studs ensures the stability of the current part.
Reminder of the importance of the vapor barrier
It is strictly essential to put a vapor barrier under the insulation layer, the vapor barrier is also called under-roof screen. The PIR insulation layer contains air which itself contains vapour. Under the effect of temperature variations, this vapor can condense and run off. The vapor barrier guarantees that this condensation does not infiltrate your ceilings.
The benefits of high-performance insulation.
Insulation works allow enormous energy savings in the long term. Reducing your energy consumption reduces your expenses and your home's energy bill. Then there is a significant ecological impact: reducing energy consumption leads to a reduction in pollution: in the production and consumption of energy.