Sotech’s accreditations

At Sotech, we pride ourselves on providing expert advice, outstanding customer service and the highest quality of products to fit the budget and design of your project.


To ensure we provide our clients with the highest calibre of product and in the pursuit of excellence for our company, we extensively test our Optima rainscreen systems both in-house and via independent testing centres to attain industry leading accreditation.

Sotech have a wide range of accreditations, including approval from RedBook Live and NBS Plus, ISO Assurance, active membership of the Rainscreen Works organisation, and a selection of our rainscreen systems have been comprehensively tested at the Vinci Technology Centre in order to meet the requirements for CWCT approval.

Our ethos towards accrediting our products is ongoing, and we are continuously testing our range of systems to ensure they are of the highest quality for each of our clients and projects, both now and in the future.

Extruded plank rainscreen cladding


Sotech Accreditations

LPCB Red Book

Sotech Limited have recently gained approval to LPS 1581 issue 2 and LPS 1582 issue 1 for their Sotech Optima Rainscreen System which is listed in the LPCB Red Book and on the Red Book Live website.


The Red Book is a world renowned listing of independently certified products or company services, and is the essential reference for those responsible for the design, specification and purchase of fire and security products.

  • LPS 1581 Issue 2 specifies the fire test and approval requirements for non-load bearing External cladding systems such as rendered insulation, brick slips, rain screen panel or similar systems applied to the masonry face of a multi-story building.
  • LPS 1582 issue 1 specifies the fire test and approval requirements for non-load bearing External cladding systems, fixed to and supported by a structural steel frame.

NBS Plus

The National Building Specification service (NBS) is predominantly a specification and information software service The NBS have produced specification products for over 30 years, including the recognised national standard specification system for the UK. The software used ensures that specifications are written using the latest clauses and technical information to produce accurate specifications. Sotech’s products are approved and listed on the NBS specification system.


Rainscreen Works

Rainscreen Work’s is not a registered organisation, but acts as a loose association of complementary manufacturing companies whose combined objective is to expand knowledge of rainscreen cladding principles to the wider UK construction industry. Each member is an acknowledged expert within their own particular field to whom other members can refer or guide specifies towards to assist with the development of project designs. Sotech are active members of Rainscreen Works


CWCT Approval

The Centre for Window and Cladding Technology (CWCT) is a leading information provider in the field of building envelopes and glazing. CWCT sets industry standards and provides guidance to its members and is based at the University of Bath.

All Optima rainscreen systems have been extensively and independently tested at the Vinci Technology Centre (formerly Taylor Woodrow) and have been accredited to the specific requirements of CWCT.


ISO quality assurance

Sotech Limited is proud to be certified to the following quality assurance schemes.

The QHSE system is independently inspected and accredited to:

• ISO 9001:2008 Quality Management System Requirements

• ISO 14001:2004 Environmental Management System Requirements

• BS OHSAS 18001:2007 Occupational Health and Safety Management System Requirements

Speak to an expert 

If you require advice with design detail, assistance with a specification or to discuss your project in detail contact our technical department who have over 35 years experience in the construction industry. The team is on hand to provide knowledge and support at every stage of your project.