Roofing Blanket

What Is Roofing Blanket Insulation?

Roofing blanket insulation is a flexible insulation product designed for use within roof systems. It is commonly supplied in rolls and can combine bulk insulation with a facing material to suit different roofing applications. The insulation layer helps resist heat transfer through the roof system, while selected roofing blankets may include a reflective foil facing that performs additional functions within the specified roof assembly. Roof blankets are widely used in residential, commercial and industrial construction, particularly with metal roofing systems where thermal performance and condensation management are important considerations.

Types of Roofing Blanket Insulation

Different roofing blanket products use different insulation materials, facings, thicknesses and R-values. Choosing between them should be based on the requirements of the complete roof system rather than R-value alone.

Glasswool Roofing Blankets

Glasswool is commonly used for roof blanket insulation. Its fibrous structure traps air within the insulation, helping resist heat transfer through the roof assembly. Glasswool roofing blankets are available in different thicknesses and R-values for residential, commercial and industrial applications.

Foil-Faced Roofing Blankets

Foil-faced roofing blankets combine bulk insulation with a facing layer. Depending on the particular product and roof system, the facing may form part of the project's vapour, condensation or reflective insulation strategy. The performance and installation requirements of the facing should always be checked against the manufacturer's specifications and the requirements of the complete roof assembly.

Polyester Roofing Insulation

Polyester insulation may also be used in suitable roof applications. Polyester products differ from glasswool in material composition, density, dimensions and handling characteristics, so compare the individual product specifications before choosing between insulation materials.

Roofing Blanket Insulation for Metal Roofs

Roofing blanket insulation is commonly used beneath metal roofing in houses, sheds, warehouses and commercial buildings. Metal roof systems can experience significant temperature changes between internal and external conditions. A correctly specified insulation layer helps improve the thermal performance of the roof system and can form part of the strategy for managing condensation. The required insulation and facing configuration will depend on the roof construction, climate, building use and applicable building requirements.

Roofing Blanket Insulation and Condensation Control

Condensation can occur when warm, moisture-containing air reaches a sufficiently cold surface within a roof system. Metal roofing can therefore require careful consideration of insulation, vapour control, ventilation and other components of the roof assembly. Some foil-faced roofing blankets are designed to perform specific functions within condensation-management systems. However, roofing blanket insulation should not be treated as a universal solution to condensation. Always select and install the product according to its technical documentation and the requirements of the particular roof system.

Understanding Roofing Blanket R-Values

The R-value indicates the thermal resistance provided by an insulation product or system. In general, a higher R-value represents greater resistance to heat flow. Roofing blankets are available across different R-values and thicknesses. The appropriate R-value depends on factors including the building design, roof construction, climate zone and applicable energy-efficiency requirements. When comparing products, check both the specified R-value and the conditions under which that performance applies.

Roofing Blanket Thickness and Sizes

Roof insulation blankets are available in different thicknesses, widths, lengths and roll coverage. Thickness often varies with the required R-value and product construction. Common roofing applications may therefore use different blanket thicknesses depending on the thermal requirements and available space within the roof assembly. Before ordering, compare:

• R-value
• Blanket thickness
• Roll width and length
• Total coverage per roll
• Foil facing or other facing material
• Roofing application
• Manufacturer installation requirements

Checking these specifications helps ensure that the selected roof blanket is appropriate for both the project and the roof system.

Thermal Performance of Roof Insulation Blankets

A major purpose of roof insulation is to reduce heat transfer through the roof assembly. During warmer conditions, insulation helps resist heat entering through the roof. During cooler conditions, it helps reduce heat transfer from conditioned internal spaces through the roof system. This can contribute to a more thermally efficient building envelope and reduce reliance on mechanical heating and cooling when insulation forms part of an appropriately designed building system.

Acoustic Performance and Roof Blankets

Roofing insulation blankets can also contribute to the acoustic performance of certain roof systems. This can be particularly relevant beneath metal roofing, where rain, hail and external environmental noise may be transmitted through the roof construction. The amount of sound reduction depends on more than the insulation blanket alone. Blanket density and thickness, roofing material, ceiling construction, air gaps, fixings and the complete roof assembly can all influence acoustic performance. For projects with specific acoustic requirements, refer to tested system data rather than relying solely on the insulation R-value.

Roofing Blanket Insulation for Residential and Commercial Projects

Roof blankets are used across a variety of building types.

Residential Roofing

Roofing blankets can be incorporated into suitable residential roof systems to improve thermal performance and assist with other roof-system requirements such as condensation management.

Sheds and Garages

Metal-roofed sheds and garages may use roof insulation blankets to improve thermal performance and help manage conditions beneath the roofing material.

Commercial and Industrial Roofing

Warehouses, workshops and other commercial or industrial buildings commonly use blanket insulation as part of large metal roof systems. Product selection should account for the required thermal performance, roof construction and project specifications.

Roofing Blanket Insulation Brands

No Gap Insulation supplies roof blanket products from established insulation manufacturers, with different options available for thermal performance, facing, dimensions and project requirements.

Knauf Earthwool Roofing Blanket

Knauf Earthwool roofing blanket products are available in different R-values and thicknesses for suitable roofing applications. Foil-faced options are available where required by the specified roof system.

Bradford Anticon Roofing Blanket

Bradford Anticon combines bulk insulation with a facing and is designed for use in suitable roofing systems. Different product configurations are available depending on the thermal and roof-system requirements of the project.

Fletcher Roofing Blanket

Fletcher roofing blanket products provide additional options for residential, commercial and industrial roof insulation applications. Compare the specified R-value, thickness, facing and roll dimensions when selecting a product.

How to Choose the Right Roofing Blanket

Start with the requirements of your roof rather than choosing a blanket based only on price. Consider the required R-value, roof type, blanket thickness, foil facing, roll dimensions, coverage and installation requirements. For metal roofs, also consider how insulation and facing interact with condensation management and the rest of the roof system. If your project has specific thermal, acoustic, condensation or compliance requirements, check the manufacturer's technical documentation and relevant project specifications before ordering.

Shop Roofing Blanket Insulation

Compare our roofing blanket insulation products by R-value, thickness, dimensions, foil facing, coverage and price to find an option suited to your roof project. No Gap Insulation supplies roof insulation blankets for residential, commercial and industrial applications, with products available from leading insulation brands.