Complying with BR135 with ROCKWOOL Rainscreen Duo Slab®
Rainscreen cladding in buildings over 18 metres in height, present various challenges in complying with insulation requirements and fire safety standards. Proximity to neighbouring buildings, provision of access for fire fighters, occupancy of the building and use of the building are some of the key factors to be considered in these types of buildings. Additionally, the height of the building is a key issue to be considered as it requires more time to escape from the top of the building to safety. This is a major challenge as it decreases the speed of evacuation and can also put wheelchair users at risk.
External cladding systems, such as the cavities within the external wall and the cladding material offer a potential route for fire spread through multi-storey buildings. The flames within the cavities can extend 5 to 10 times their original length as no other outlets exist, spreading through window openings and impinging on other parts of the building, usually above.
Careful planning of the building design and fire risk potential is therefore essential to ensure that the buildings achieve the required levels of fire safety and comply with BR135 standards.
Specifically designed for high rise buildings, RAINSCREEN DUO SLAB® is a dual density insulation board that is manufactured from volcanic rock and comprises of a robust outer surface and a resilient inner face. By compressing the primary fleece onto the top 15mm of the insulation, the product can be used, unprotected, in conditions of severe climatic exposure, including strong wind and rain as experienced at high altitudes.
RAINSCREEN DUO SLAB® complies with Approved Document B, achieving the highest Euroclass classification: A1. As it is made from stone wool, it is naturally fire resistant and offers impressive non-combustible properties.
The robust outer surface of the RAINSCREEN DUO SLAB® resists damage and over-driving of fixings. As a fibre based product, it can be amalgamated to slot into very tight spaces and around brackets, leaving no empty gaps and achieving optimum thermal performance while also maintaining its shape in the long term by not moving, shrinking or warping.
ROCKWOOL RAINSCREEN DUO SLAB®’s unique dual density technology requires fewer fixings compared to standard stone wool slabs, thus providing an efficient and cost effective solution in over cladding applications. The product’s improved technology protects the slab against UV rays and provides high resistance to wind and rain thanks to its robust outer layer. When installed, RAINSCREEN DUO SLAB® knits together when tightly butt jointed, minimising heat loss.
Specifically designed for use in conditions of severe climatic exposure, ROCKWOOL RAINSCREEN DUO SLAB® has been successfully tested and approved by the Building Research Establishment (BRE) confirming its ability to exceed the maximum UK basic wind speed of 56 m/s. The slab’s versatility makes it an ideal product for use as a thermal insulation layer behind a variety of rainscreen cladding systems, such as ROCKPANEL.
Wilmcote House is a sheltered housing scheme in Portsmouth, featuring three connected 11 storey blocks of 107 residential maisonettes, originally constructed in 1968.
Set within the northern Manchester suburbs, Collyhurst is an economically rundown area that houses some of the most deprived communities in the country.
The challenge The design of the O2 arena’s roof had to incorporate state-of-the-art acoustic engineering to eliminate virtually all nuisance ambient noise (bass thumping) outside the arena while ensuring fantastic acoustics inside the structure.
In December 2007, RCT Homes Ltd became Wales’s largest social landlord after taking over the ownership and management of nearly 11,000 homes from Rhondda Cynon Taf County Borough Council. A not-for-profit organisation, RCT Homes provides high quality housing and manages housing services for more than 60 housing estates and 27 sheltered housing schemes.
Stopsley High School is a mixed Comprehensive and Community College that is located in the northern suburb of Luton. Achieving ‘Specialist Sports College’ status in 2002, the school educates children from 11-16 years old. In 2013, the school received funding from the Government, via the Priority School Building Programme (PSBP), which aims to address the needs of schools most in need of urgent repair.
REECH (Renewables and Energy Efficiency in Community Housing) is a European Regional Development Fund (ERDF) funded project aimed at improving energy efficiency in some of the most deprived communities in Liverpool. Social housing provider, One Vision Housing, accessed ERDF funding to help fund the improvement of the Hornby Flats Estate development in Litherland.
Aldgate Tower is a brand new, state-of-the-art office development, the first phase of a wider regeneration of the Aldgate area in London.
A tightly grouped housing development, less than 500m from the south bank of the Dee estuary, Dee Cottages is an early example of corporate involvement in housing design directly associated with the arrival of the Courtaulds company during the closing years of the First World War.
The task was to extend the life of three 1960s residential tower blocks by significantly improving the insulation, thereby increasing thermal comfort and making the flats more economical for residents to heat.
RAINSCREEN DUO SLAB® complies with Approved Document B, achieving the highest Euroclass classification: A1.
Every medium- and high-rise building should only be clad and insulated with non-combustible* materials.
With literally thousands of material, texture and colour combinations available, Rainscreen Cladding and External Wall Systems offer designers increased flexibility and the freedom to design bespoke systems for clients and building owners.
Given that most fires occur in domestic dwellings, blocks of flats have a high safety risk potential in the event of a fire.
Today’s modern multi-storey buildings tend to offer a complex mix of occupation, including offices, hotels, residential, retail and leisure facilities.
A fire will continue to burn until actively extinguished or until the combustibles or oxygen is exhausted.
All combustible materials produce some amount of toxic smoke when they burn. How much toxic smoke will be emitted depends on the material, the amount of oxygen available and how long it burns.