Roof Systems

Overview

• Insulated Panel Systems: Insulated panel systems consist of pre-insulated roof panels that provide both insulation and structural support. These panels typically have a core insulation material, such as polyisocyanurate (PIR) or expanded polystyrene (EPS), sandwiched between two metal sheets. U-values for insulated panel systems can range from 0.10 to 0.20 W/m²K, depending on the thickness and type of insulation used.

• Warm Roof Insulation: Warm roof insulation involves installing insulation on top of the roof structure, directly under the waterproofing layer. Common insulation materials include rigid boards such as PIR or mineral wool. U-values for warm roof insulation can vary, typically ranging from 0.12 to 0.25 W/m²K, depending on the insulation thickness and material used.

• Cold Roof Insulation: Cold roof insulation involves installing insulation at ceiling level, creating a ventilated void between the insulation and the roof covering. This method allows for air movement to prevent condensation and moisture build-up. U-values for cold roof insulation can range from 0.12 to 0.25 W/m²K, depending on the insulation material and thickness used.

• Extensive Green Roofs: Extensive green roofs feature a thin layer of lightweight vegetation and growing medium. The vegetation provides insulation and environmental benefits, such as stormwater management and biodiversity enhancement. U-values for extensive green roofs can range from 0.10 to 0.25 W/m²K, depending on the additional insulation layers and growing medium thickness.
• Intensive Green Roofs: Intensive green roofs are thicker and allow for a wider variety of plants and landscaping features. These roofs provide greater insulation properties due to the increased thickness of the growing medium. U-values for intensive green roofs can range from 0.10 to 0.25 W/m²K, depending on the insulation layers and the depth of the growing medium.

• Insulated Metal Roof Panels: Insulated metal roof panels consist of metal sheets with insulation material integrated into them. These panels provide structural support, weather resistance, and insulation in a single system. U-values for insulated metal roof panels can range from 0.12 to 0.20 W/m²K, depending on the insulation thickness and material used.

• Tile or Slate Roof: Traditional tile or slate roofs are commonly used in Ireland. The U-values for these roofs depend on the specific tile or slate material used, as well as the insulation incorporated beneath them. U-values for tile or slate roofs can vary, typically ranging from 0.15 to 0.30 W/m²K, depending on the insulation thickness and type.