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ROCKWOOL party wall insulation can reduce heat loss in semi-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.

Separating Party Wall Insulation Products

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:

  • Reduce sound transfer through walls
  • Improve energy efficiency
  • Raise fire resilience2

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. 

Statistics from the Energy Saving Trust show that homes could make yearly energy bill savings of:

  • Semi-detached – £150
  • Mid terrace – £95
  • Flat – £70

 

Use our ROCKWOOL U-Value calculator to determine the thermal performance of the building’s walls. 

 

applications, facade, internal walls, how to
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
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
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17.2 MB

The ROCKWOOL Red Book

To be updated
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3.3 MB

Why stone wool?

To be updated
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137.0 KB

ROCKWOOL Material Safety Datasheet

Financial support

Check the Energy Savings Trust website to see whether there are any financial support schemes available for party wall insulation.

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FAQs

FAQs

Does soundproofing a party wall work?

Installing quality insulation helps reduce the passage of sound between housing and adjoining properties. Lower amounts of noise are transferred and the acoustic performance of buildings are improved.12

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

A party wall’s u-value is the measure of how much heat is allowed to flow through it13. By adding insulation, you can improve the thermal performance of a party wall and prevent heat being lost through the cavity space.

Do party walls have a cavity?

Separation walls built after the 1950s are often designed with a cavity space in-between properties. Insulating these can be done with the support of expert installers.