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Systems & Materials

Kingspan Roof Insulation

K-Roofing contractors are specialists in roof insulation.

There are many types of roof insulation available for warm roofs.

The insulation layer fits between the vapour control barrier and waterproof layer(s).

The choice of insulation depends mostly upon the roof style and use, and the degree of energy saving required.

Rated in V's, the greater the V there are, the less thickness will be needed to achieave energy saving. See Materials Table below for the most common applications,

Mineral Wool

Mineral Wool is a non metallic, inorganic product manufactured from glass or rock.

Knauf Insulation and Rockwool mineral wool products have a high insulation rating as well as being heat and fire resistant and possessing good sound proofing characteristics.

How is Mineral Wool Made?

Mineral Wool is manufactures by heating a carefully controlled mix of mainly diabase rock or silica raw material in a cylindrical furnace until molten. The rock product is then spun to form flexible mats for further processing into finished products.

PUR - Polyurethane or Rigid Urethane Foam (RUF)

Rigid foam insulation is a very efficient insulator; rigid urethane foam is lightweight and available in various sheet/block sizes and thicknesses.

The RUF grade we recommend will be suited to the material used for the waterproofing and it will conform to British Standard 4841 Part 3.

Expanded Polystyrene Insulation

Expanded polystyrene insulation is an efficient insulator on warm-deck flat-roof constructions and can be used to meet Building Regulations on felted roofs, mastic asphalt roofs and in Single Ply Membrane systems on domestic residential and commercial buildings.

Expanded polystyrene insulation has low thermal transmittance, resistant to rot and is extremely versatile, it is also available with bonded coatings. However as it is very heat-sensitive and will requires a protective overlay (for example cork or wood-fibre soft-board) if bitumen felt is to be laid over it.

Expanded polystyrene should conform to British Standard 3837, Part 1. Only HD (high duty) and EHD (extra high duty) grades are suitable for flat roofs.

Insulation materials chart – thermal properties and environmental ratings

Source: www.energysavingtrust.org.uk