Warm Roof Insulation

A warm roof consists of warm flat roof insulation and is an airtight construction, without any gaps.

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Warm Roof Insulation

The waterproofing membrane is placed directly on top of the insulation.

Insulation is generally applied directly on top of the steel, concrete, or wooden deck, with a vapour check layer often installed below the insulation – towards the deck – to make sure that no moisture can penetrate the construction.

This helps to keep hot air outside of the building and keep the indoor climate at a comfortable level¹.

ROCKWOOL warm roof insulation is made from stone wool and designed to achieve maximum thermal performance. It’s also non-combustible, with exceptional acoustic properties.

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Why do we need warm roof insulation?

Roof insulation is important because it keeps out the hot air from entering the building. When installed, it seals off gap that allow air from passing through.

As one of the most effective ways to prevent heat transmission , it is the most favourable way to insulate flat- and pitched roofs and make the most of the space, both simplifying the design and helping to lower costs².

Relevant resources

7 facts about. Durability and stone wool insulation

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8 facts about. Stone wool’s mechanical performance

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265.7 kB

Calculator and savings

Buildings with warm flat roofs typically use less energy to heat or cool the indoor space, making it a great investment for industrial, domestic, and commercial properties. Bills should generally be lower, and the building’s carbon footprint reduced.

When planning your project, the insulation thickness can be set to almost any specification. Warm flat roof insulation is highly effective – and often a key part of the energy-saving potential for the entire building envelope.

Globally, the average installed density of stone wool insulation for warm flat roofing is approximately 100 – 170 Kg/m3 depending on the type of system.

Use our ROCKWOOL U-value calculator to determine the thermal performance of the building's roofs and possible cost savings. For more details on technical specifications, visit our ROCKSPEC Specification Toolkit.

Learn about energy efficiency

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Why choose ROCKWOOL solutions?

Our insulation uses powerful stone wool to help keep the indoor climate at optimal comfortable level inside your building – and block the outside noise out.

When applied above the roof deck, warm roof insulation provides an added layer of protection that prevent heat transmission , helping to create a comfortable environment inside.

Effective for the lifetime of a building³, our stone wool insulation is quick and easy to install whether you’re working on blocks of flats, schools or other buildings with a flat roof.

ROCKWOOL products give you the ultimate peace of mind:

Effective insulation engineered to last the lifetime of a building⁴
Fire protection which can withstand temperatures of up to 1000°C⁵
Acoustic solutions that reduce noise from weather and urban life

Effectiveness

As 66 percent of energy consumption in buildings is used for heating, cooling and ventilation⁶ , our insulation helps to reduce this by maintaining an optimum indoor temperature.

Robust and durable

ROCKWOOL product structures are flexible with a high point load – having no movement when exposed to heat, cold and moisture.

Acoustic protection

Sound reduction is also a key feature of our insulation. It can help to absorb and block out noise from urban life and harsh weather conditions.

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Case studies

The new Apollo Tyres factory in Hungary was constructed to produce millions of truck and car tyres each year – with high amounts of combustible material on-site.

The challenge

The company wanted to boost fire safety for its employees. Reducing energy costs and the building’s carbon footprint was also a major concern.

The solution

Architects suggested installing 190,000m² of fire class A1 ROCKWOOL insulation into the factory roof to increase its overall fire performance. The insulation also helped to reduce the carbon footprint and improve interior climate conditions inside the factory for the workers⁷.

Find more case studies

Reference case, Taulov Dry Port, Hardrock, building site, FRI, roof, construction

Applications

Insulation

Metal Roof Insulation | ROCKWOOL Asia

Improve energy efficiency and acoustic performance with ROCKWOOL metal roof insulation. Our solutions are resilient, long-lasting and non-combustible.

Insulation

Rafter Insulation | ROCKWOOL Asia

ROCKWOOL rafter insulation uses the power of natural stone to conserve energy and protect against external noise. Learn more about it today.

Insulation

Loft Insulation

Installing ROCKWOOL loft insulation can reduce heat and energy loss, preventing problems with noise, rot and mould.

Installation

Key tips:

Before starting, accurately measure the roof space
Clear the roof surface of any loose debris
Lay the boards tightly with staggered joints⁸

Inspiration and guides for professionals

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Our sales package that can boost your business includes:

Guide on how to sell a premium job
Tips & tricks to do an expert installation
Advice on effective communication with customers
Frequently asked questions by other professionals and customers
Boost your skills by watching our installation videos

Sustainability and energy efficiency

All our products are designed to be robust and energy efficient.

Creating functional and sustainable insulation is part of our core values to help improve modern living for the future – and to care for the environment.

ROCKWOOL warm flat roof insulation is part of our aim to help buildings reach global building standards in their local markets, by making them affordable, energy efficient and environmentally friendly.

Our products are created to ensure the towns and cities we build today are sustainable for the future⁹.

8 facts about the circularity of stone wool

Reference case, Kay Fiskers Plads, REDAir, building site, GBI, facade, office building, construction, reclaim waste, recycling, sustainability

Downloads and resources

Urbanization

Healing architecture

Patients recover faster when healthcare facilities are thoughtfully designed

Specification Tool for Building Products and Systems

Rockspec Specification Tool

Rockspec enables you to find and select different options of products and systems based on your projects technical specification requirements.

Energy Efficiency

Welcome to the zero-energy house

Built with the right techniques, a home can produce as much energy as it uses.

Indoor Health, Safety & Wellbeing

Non-combustible building facades

Every medium- and high-rise building should only be clad and insulated with non-combustible materials

Sustainability & Circularity

Saving energy forever

The solution to saving energy is here, today. Insulation is an easy, cost-effective way to make buildings sustainable.

Indoor Health, Safety & Wellbeing

Getting fresh air inside

We spend a lot of time inside, so it’s important that the environment within our homes is healthy.

Financial support

Local government grants and subsidies may be available for insulation if your building or household is eligible. Sustainability schemes and refunds may be available through tax reductions or incentive schemes. Contact our local offices for more information.

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