Separating Party Wall Insulation

Find products

Resources External wall applications Internal wall applications

ETICS, external wall, clinker, interior, exterior

ROCKWOOL party wall insulation can reduce heat loss in detached properties and flats.

Made from natural stone wool, our products help to regulate temperatures and reduce the impact of noise from neighbouring properties.

Find out how our range can boost the energy efficiency of your project

Find inspiration, guides and reports

Why do we need party wall insulation?

Separating party walls are the dividing walls between two attached properties. They are constructed from solid materials, such as bricks and concrete blocks, or built out of a framed wall construction, using wooden studs or metal frames.

There is usually a gap between party walls called an air cavity, which separates the buildings. Cold air can seep into this cavity, through edges that are exposed to the elements outside, while warm air rises and escapes the building.

This heat loss can drive up heating bills and create a less energy efficient home. Noise can also be an issue, as sound can easily travel through this hollow space. The increased amount of cold air flowing into a building can even increase the risk of occupants developing respiratory conditions - or exacerbating existing symptoms¹.

Party wall insulation fills the gap in-between, ensuring heat and sound are captured and contained – improving acoustic and thermal performance.

High-quality insulation helps to:

Adequately soundproof walls
Improve energy efficiency
Raise fire resilience²

Relevant resources

Separation walls can substantially increase the acoustic performance, especially when it is designed and built as a wood or metal-framed construction.

Roger Peeters

ROCKWOOL Group Product Manager

Calculator and savings

To work out the amount of insulation you’ll need, measure the length and width of the space you’re installing in and multiply – this will give you the m² area of the wall.

It’s also helpful to know the depth of the cavity wall space. This will determine what insulation thickness you require and how many layers you’ll need.

Learn about energy efficiency

applications, facade, internal walls, how to

Why choose ROCKWOOL solutions?

ROCKWOOL party wall insulation harnesses the power of stone wool. We offer high density products, for a rigid fit in solid walls, and low density slabs easily placed in wooden or metal framed constructions. Our solutions provide all-round safety and comfort.

Key benefits:

Fire resilient – non-combustible and able to withstand temperatures exceeding 1000°C, boosting party wall fire stop ROCKWOOL insulation retains lifetime fire performance³.
Temperature regulating – captures natural air in between stone wool fibres help to maintain a steady temperature, reducing heating and cooling costs⁴.
Acoustic performance – our party wall sound insulation improves resistance to airborne sound⁵.
Water repellent – stone wool repels water, stopping it from penetrating the product and letting moisture pass through. This helps keep party wall spaces warm and dry⁶.
Natural & sustainable – produced with zero waste water discharge⁷ and can be recycled repeatedly, without any quality loss⁸.

Find ROCKWOOL products

With a range of dedicated products for party wall applications, ROCKWOOL insulation meets specific needs such as good sound insulation and high fire resistance.

Roger Peeters

Global Product Manager, ROCKWOOL Group

Case studies

The challenge

The DUO Residences twin tower development in Ophir-Rochor, Singapore, involved construction of 660 luxury flats in one tower, while the other included a five-star hotel, office and retail units.

Architects were keen to reduce noise transfer between luxury units and penthouses. They also wanted to increase thermal performance.

The solution

ROCKWOOL insulation was chosen for separating walls, thanks to its excellent sound absorption qualities.

Fire resilience was another crucial factor. Stone wool not only allows walls to ‘breathe’ by letting air pass through, boosting air quality, but also withstands temperatures of up to 1000°C.

The results

Less noise travelling between residences
Comfortable indoor temperatures
Safer environment for residents

Find more case studies

Marina One multi-purpose complex, Singapore, towers, urbanisation, indoor comfort, health and wellbeing, insulation, high-rise, quiet, mixed use, city, skyscrapers

DUO Residences is a Green Mark Gold Plus-rated building, and we’re proud to provide insulation solutions that enrich the lives of residents.

Alex Low

Country Sales Manager, ROCKWOOL Singapore

Other wall applications

Insulation

Cladded Façade Insulation

ROCKWOOL insulation for cladded façade systems can boost energy efficiency, fire resilience and acoustic performance. Find out more today.

Insulation

ETICS

Apply multilayer insulation ETICS solutions to the external walls of a new or existing building.

Insulation

Dry Lining Insulation

Dry lining insulation enhances the thermal performance of external walls and saves energy.

Insulation

Partition Wall Insulation

Partition stud wall insulation is one of the best ways to insulate room-dividing walls.

The pioneering way to build nearly zero-energy homes

Rockzero system

Introducing our latest innovation, Rockzero: a pioneering new wall system that integrates the natural benefits of stone wool insulation with the structural support of the home. It’s revolutionising the way homes are built.

Insulation

Cavity Wall Insulation

Cavity wall insulation can prevent heat loss, reduce energy use and cut heating costs.

Insulation

Metal Wall Insulation

Metal wall insulation improves building performance and operating costs for constructions with metal wall systems.

Insulation

Basement Wall Insulation

Basement wall insulation can protect soil-facing walls from heat loss, damp and moisture.

Insulation

Timber Frame Insulation

Timber frame insulation provides strong acoustic, fire resistant and thermal properties.

Installation

There are different approaches to installing our party wall insulation products, depending on whether you are working on a new build or a renovation.

During a new build, you can easily incorporate one of our various solutions to improve the thermal, sound and fire resistant properties of a seperation party wall.

When renovating a party wall, to inmprove its performance, a good solution would be to construct a dry wall solution against thr separation wall. Alternatively, you could have your wall inspected by an installer and a insulated with our granulate solution.

in some countries, products are available that can be placed at the rafter line or adjacent outer wall - to avoid heat loss at the edge of the construction.

Installation guides can be found on our individual product pages.

Key tips:

Measure out space before installing – make sure you have the right amount of insulation needed for your party wall.
Don’t leave any gaps – ensure all voids or gaps are covered, to avoid remaining heat or sound passing through cavity spaces.
Choose the correct insulation – select your insulation based on thermal, acoustic and fire performance, to ensure optimal performance.

Inspiration and guides for professionals

Get 16 renovation cases

This case study bundle includes:

29 pages of our best 2018-19 projects
Acoustic renovation in both public buildings and private
Bringing new life into old buildings with facade panels
Improving fire safety and wellbeing in high-rises and historical buildings
Reducing noise and flooding with innovative stone wool solutions

Sustainability and energy efficiency

ROCKWOOL party wall insulation is manufactured in an environmentally-friendly way.

We use sustainably-sourced diabase rock to create our stone wool solutions⁹. More than 38,000 times the amount used to manufacture ROCKWOOL products is generated naturally each year¹⁰.

kernrock 033, kerndämmung, dämmung zweischaliges mauerwerk, wärmeschutz, core insulation, insulation of double-layer masonry, wall insulation, thermal insulation, press, presse, Germany

Our stone wool products can help reduce energy bills and nuisance noise, improving the lives of those living and working in buildings with ROCKWOOL insulation.

Stone wool insulation is:

Healthy for the environment
Robust and durable
Carbon footprint-reducing

Once our products have been used, they can also be recycled – ensuring those resources aren’t wasted¹¹.

8 facts about the circularity of stone wool

Downloads and resources

By Andrei-Mircea Corches

Health

Climate Change

Sustainability

Fire safety

Why building with wood is rising in popularity

In recent years, wood as a building material is becoming more and more popular. We are exploring why.

By Andrei-Mircea Corches

Fire safety

Find out how fire compartments can help minimise fire damage

Find out what a fire compartment is, along with the critical role fire resistant materials play in your building.

By Vincci Morales

Energy Efficiency

Wellbeing

Quality of life

5 questions you should ask when buying a new house

Discover crucial tips for buying a newly built house.

By BroLaws Construction

Renovation

Wellbeing

Insulation - Why is it important?

When building or renovating a house, it is important to think about insulation. That goes for any room in question.

By Vincci Morales

Energy Efficiency

5 Ways to save energy at home

Are you frustrated over the rising cost of your energy bill? Or maybe you just want to do your part for the environment? Read our 5 ways to save energy at home.

Financial support

Please check with your local government body for schemes which mean you could be eligible for financial support or refunds, especially in the case of renovations.

Find your local ROCKWOOL office

Energy Efficiency, Key, Keyboard, Button

FAQs

Does soundproofing a party wall work?

Can you improve a party wall’s u-value?

Other relevant applications

Insulation

Floor Insulation

ROCKWOOL floor insulation is made from premium stone wool and can improve a building’s thermal and acoustic performance.

Insulation

Ceiling Insulation

Effective ceiling insulation helps to retain heat and absorb sound between separating floors.

Insulation

Internal Wall Insulation

Internal wall insulation reduces heating bills and boosts indoor comfort.

Insulation

Roof Insulation

We supply an array of roof insulation products for any type of build, increasing energy efficiency.

Insulation

HVAC Insulation

HVAC insulation reduces energy loss for central heating systems, piping and ventilation ducts in large constructions.

Insulation

Acoustic Insulation

Acoustic insulation protects building occupants from noise pollution and boosts comfort and privacy.

https://www.ncbi.nlm.nih.gov/books/NBK535294/

_{[2] <a href=https://www.rockwool.com/"https://www.rockwool.com/group/advice-and-inspiration/why-stone-wool/fire-resilience//">https://www.rockwool.com/group/advice-and-inspiration/why-stone-wool/fire-resilience/}

_{[3] <a href=https://www.rockwool.com/"https://energysavingtrust.org.uk/home-insulation/cavity-wall/">https://energysavingtrust.org.uk/home-insulation/cavity-wall}

_{[4] <a href=https://www.rockwool.com/"https://energysavingtrust.org.uk/home-insulation/cavity-wall/">https://energysavingtrust.org.uk/home-insulation/cavity-wall}

_{[5] <a href=https://www.rockwool.com/"https://www.rockwool.com/siteassets/rw-group/media/sailgp/sailgp-guides/rockwool-b2c-guide-v5.pdf/">https://www.rockwool.com/siteassets/rw-group/media/sailgp-guides/rockwool-b2c-guide-v5.pdf}

_[6] _{https://www.rockwool.com/group/}advice-and-inspiration/why-stone-wool/thermal-properties/

_[7] _{https://www.rockwool.com/group/}advice-and-inspiration/why-stone-wool/acoustic-capabilities/

_[8] _{DTU Civil Engineering Prof. Carsten Rode, “Influence of moisture on performance of mineral wool insulation” (2018) <a href=https://www.rockwool.com/"https://www.researchgate.net/publication/342573873_Moisture_performance_of_a_new_thermal_insulation_composite_for_interior_application/">Source link</a> </sub></p><p><sub>[9] <a href=https://www.rockwool.com/"https://www.rockwool.com/siteassets/rw-group/media/sustainability/sustainability-reports/rockwool_sustainabilityreport_2018.pdf?f=20200331013320\%22>ROCKWOOL Group, Sustainability Report 2018, p. 20. </a></sub></p><p><sub>[10] </sub><a href=https://www.rockwool.com/"https://www.rockwool.com/siteassets/rw-group/media/sustainability/sustainability-reports/2017_rockwool-sustainability-report-1.pdf?f=20200331013334\%22>_{ROCKWOOL Group, Sustainability Report 2017, p. 22. </sub></a></p><p><sub>[11] <a href=https://www.rockwool.com/"https://www.rockwool.com/group/about-us/sustainability/#Sustainable\">https://www.rockwool.com/group/about-us/sustainability/#Sustainable</a></sub></p><p><sub>[12] <a href=https://www.rockwool.com/"https://www.rockwool.com/group/about-us/sustainability/#Sustainable\">https://www.rockwool.com/group/about-us/sustainability/#Sustainable</a></sub></p><p><sub>[13] <a href=https://www.rockwool.com/"https://www.rockwool.com/siteassets/rw-group/media/sustainability/sustainability-reports/2017_rockwool-sustainability-report-1.pdf?f=20200331013334\%22>ROCKWOOL Group, Sustainability Report 2017, p. 22</a> </sub></p>","columnTwo":"","primaryButtonTwo":{"componentName":"PrimaryButton","title":null,"cssClass":"btn","openThankYouPageInTheSamePage":false,"link":"","openLinkInNewTab":false,"iconName":"arrow-right","isFileGated":false,"documentDataObject":null,"target":"_self","extensions":null,"file":false,"fileTitle":null,"trackingLabel":null,"fileType":null,"fileCategory":null,"downloadType":null,"fileDataTarget":null},"primaryButtonSignUpOne":{"componentName":"PrimarySignUpButton","useMarketoForm":false,"headline":null,"description":null,"signUpButtonText":null,"openSignUpLinkInNewTab":false,"successMessage":null,"marketoFormId":null,"marketoFormName":null,"marketoFormPurpose":null,"dontFollowupUrl":false,"showSubmitMessage":false,"submitHeader":null,"submitMessage":null,"sendAnotherMessage":"Send another message","svg":"<svg xmlns=\"https://www.w3.org/2000/svg\" width=\"16\" height=\"16\" viewBox=\"0 0 16 16\"> <path fill=\"#FFFFFF\" fill-rule=\"nonzero\" d=\"M11.166 8.81l-2.962 3.308 1.118 1 4.55-5.083L9.316 3 8.204 4.007l2.989 3.302H1v1.5h10.166z\"/></svg>","openThankYouPageInTheSamePage":false,"hideOnMobile":false,"hasButtonText":false,"signUpButton":{"componentName":"PrimaryButton","title":"Sign up","cssClass":null,"openThankYouPageInTheSamePage":false,"link":null,"openLinkInNewTab":false,"iconName":null,"isFileGated":false,"documentDataObject":null,"target":null,"extensions":null,"file":false,"fileTitle":null,"trackingLabel":null,"fileType":null,"fileCategory":null,"downloadType":null,"fileDataTarget":null},"hasButton":true,"hasMarketoFormId":false,"title":null,"cssClass":"btn","link":"","openLinkInNewTab":false,"iconName":"arrow-right","isFileGated":false,"documentDataObject":null,"target":"_self","extensions":null,"file":false,"fileTitle":null,"trackingLabel":null,"fileType":null,"fileCategory":null,"downloadType":null,"fileDataTarget":null},"buttonSignUp":{"componentName":"SecondarySignUpButton","useMarketoForm":false,"headline":null,"description":null,"signUpButtonText":null,"openSignUpLinkInNewTab":false,"successMessage":null,"marketoFormId":null,"marketoFormName":null,"marketoFormPurpose":null,"dontFollowupUrl":false,"showSubmitMessage":false,"submitHeader":null,"submitMessage":null,"sendAnotherMessage":"Send another message","svg":"<svg xmlns=\"https://www.w3.org/2000/svg\" width=\"16\" height=\"16\" viewBox=\"0 0 16 16\"> <path fill=\"#FFFFFF\" fill-rule=\"nonzero\" d=\"M11.166 8.81l-2.962 3.308 1.118 1 4.55-5.083L9.316 3 8.204 4.007l2.989 3.302H1v1.5h10.166z\"/></svg>","openThankYouPageInTheSamePage":false,"hideOnMobile":false,"hasButtonText":false,"signUpButton":{"componentName":"PrimaryButton","title":"Sign up","cssClass":null,"openThankYouPageInTheSamePage":false,"link":null,"openLinkInNewTab":false,"iconName":null,"isFileGated":false,"documentDataObject":null,"target":null,"extensions":null,"file":false,"fileTitle":null,"trackingLabel":null,"fileType":null,"fileCategory":null,"downloadType":null,"fileDataTarget":null},"hasButton":true,"hasMarketoFormId":false,"file":null,"documentDataObject":null,"isFileGated":false,"isButtonStyleDisabled":false,"link":"","title":null,"relationship":null,"target":"_self","htmlAttributes":null,"extensions":null,"hasContent":false,"cssClass":"btn btn--secondary is-small","iconName":"arrow-right","fileTitle":null,"useButtonStyle":false,"trackingLabel":null,"fileType":null,"fileCategory":null,"downloadType":null},"buttonSignUpTwo":{"componentName":"SecondarySignUpButton","useMarketoForm":false,"headline":null,"description":null,"signUpButtonText":null,"openSignUpLinkInNewTab":false,"successMessage":null,"marketoFormId":null,"marketoFormName":null,"marketoFormPurpose":null,"dontFollowupUrl":false,"showSubmitMessage":false,"submitHeader":null,"submitMessage":null,"sendAnotherMessage":"Send another message","svg":"<svg xmlns=\"https://www.w3.org/2000/svg\" width=\"16\" height=\"16\" viewBox=\"0 0 16 16\"> <path fill=\"#FFFFFF\" fill-rule=\"nonzero\" d=\"M11.166 8.81l-2.962 3.308 1.118 1 4.55-5.083L9.316 3 8.204 4.007l2.989 3.302H1v1.5h10.166z\"/></svg>","openThankYouPageInTheSamePage":false,"hideOnMobile":false,"hasButtonText":false,"signUpButton":{"componentName":"PrimaryButton","title":"Sign up","cssClass":null,"openThankYouPageInTheSamePage":false,"link":null,"openLinkInNewTab":false,"iconName":null,"isFileGated":false,"documentDataObject":null,"target":null,"extensions":null,"file":false,"fileTitle":null,"trackingLabel":null,"fileType":null,"fileCategory":null,"downloadType":null,"fileDataTarget":null},"hasButton":true,"hasMarketoFormId":false,"file":null,"documentDataObject":null,"isFileGated":false,"isButtonStyleDisabled":false,"link":"","title":null,"relationship":null,"target":"_self","htmlAttributes":null,"extensions":null,"hasContent":false,"cssClass":"btn btn--secondary is-small","iconName":"arrow-right","fileTitle":null,"useButtonStyle":false,"trackingLabel":null,"fileType":null,"fileCategory":null,"downloadType":null},"openRedirectPopupOnPrimaryButtonSignUpOne":false,"openRedirectPopupOnPrimaryButtonTwo":false,"openRedirectPopupOnButtonSignUp":false,"openRedirectPopupOnButtonSignUpTwo":false,"headerStyle":"H2","textAlignment":null,"isWide":true,"noBottomSpacing":false,"backgroundStyle":null,"fullWidthCta":false,"splitButtonsUnderColumns":false,"primaryButtonsWidth":0,"primaryButtonsSpacing":0,"outlinePrimaryButtonTwo":false,"useScrollReveal":false,"noWidth":false,"hasAchorId":"","deepLinkId":null,"asModule":"as-module","splitMode":"","bottomSpacing":"","backgroundClasses":null,"extensions":"sign-up-secondary","showArrowRight":false}" data-server-side-rendered="True" data-use-redux="False">}}

_{[1] WHO Housing and Health Guidelines - https://www.ncbi.nlm.nih.gov/books/NBK535294/}

_{[2] https://www.rockwool.com/group/advice-and-inspiration/why-stone-wool/fire-resilience/}

_{[3] https://energysavingtrust.org.uk/home-insulation/cavity-wall}

_{[4] https://energysavingtrust.org.uk/home-insulation/cavity-wall}

_{[5] https://www.rockwool.com/siteassets/rw-group/media/sailgp-guides/rockwool-b2c-guide-v5.pdf}

_[6]_{https://www.rockwool.com/group/}advice-and-inspiration/why-stone-wool/thermal-properties/

_[7]_{https://www.rockwool.com/group/}advice-and-inspiration/why-stone-wool/acoustic-capabilities/

_[8]_{DTU Civil Engineering Prof. Carsten Rode, “Influence of moisture on performance of mineral wool insulation” (2018) Source link}