Flat Roof Insulation

At Building Supplies Online we stock the Kingspan range of Flat Roof Insulation Board

Flat Roof Insulation Guidelines

The Kingspan TR26 Flat Roof Insulation board is designed for flat roofs waterproofed with mechanically fixed single-ply waterproofing. It has zero Ozone Depletion Potential (ODP) and low Global Warming Potential (GWP). Manufactured with a blowing, TR26 is a High-performance rigid thermoset polyisocyanurate (PIR) insulant. Insulation is needed to reduce heat loss in the winter and control excessive heat during the summer. This will help to conserve energy and ensure comfort is maintained within the building. Insulation can also help to reduce condensation and depending on the type of insulation used, contribute to acoustic insulation.

What is a U value of a flat roof?

To comply with Part L of the building regulations 2010, all roofs except those in unheated buildings should be thermally insulated to a maximum U-value of 0.18 W/m²K.
A lower U-value means better flat roof insulation, therefor  U-value requirements usually specify a maximum value.
U-value calculations take into account the thermal resistivity and thickness of the flat roof insulation.
the rate of heat transmission through a unit area for each degree of temperature difference from inside to outside the building.  The rate of heat transmission through a unit area for each degree of temperature difference from inside to outside the building is known as Thermal Resistance.

For a warm flat roof:

Flat roof insulation should be able to withstand extremes of UV light and temperature without deterioration in thermal performance.
Your Flat Roof insulation Board should be able to resist pressure from any potential foot traffic and suitable and durable for external use.
Your Flat Roof Insulation Board should be able to provide support and protection to the weatherproofing membrane and moisture resistant.
Your Flat Roof Insulation Board should be capable of withstanding loads during construction and future maintenance.

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