
As the recognised trade association for the UK external wall insulation industry INCA regularly publishes technical and best practice guidance documentation which can be freely downloaded in PDF format via the links below.
Further documents are scheduled for publication over the coming months and on an ongoing basis.
INCA Best Practice / Technical Guides
We would like to express oour thanks to the volunteer members of the INCA Technical Committee, SWIGA, EWI Consultants Ltd and the membership as a whole for their valuable contributions towards the publication of these industry defining guides.
INCA: EWI Best Practice Guides:

Best Practice Guide
EWI + Render Finishes

Best Practice Guide
EWI + Brick Slip Finishes

Best Practice Guide
EWI + Drained Cavities
INCA: EWI Technical Guidance Documentation:

TG-01: Fire Performance For EWI Systems

TG-02: Impact Resistance Of EWI

TG-03: Wind Load Design For EWI Systems

TG-04: Mechanical Fixings For EWI Systems

TG-05: EWI Maintenance Guidance Manual

TG-06: Weathering And Thermal Bridge Control

Roofline Closure Systems
Roofline Closure Systems have now received formal approval from the Department for Energy Security and Net Zero (DESNZ) and so installations may now commence.
EWI & Fire Regulations
When it comes to EWI and fire regulations, the classification system defined in BS EN 13501-1 is the primary recognised standard in the construction industry as a whole and applies to external wall insulations systems. You can purchase a full copy of BS EN 13501-1 – Fire classification using data from reaction to fire tests.
The process for classification under this standard involves a combination of up to five rigorous tests designed to assess each product on a range of characteristics, including combustibility, heat levels, flame spread and smoke release. Once tested, the product receives an official classification of its Euroclass fire rating. Read more > We have added links to or downloads of key documentation below:
IMPORTANT: Fire safety is critical at all times. Should you require any further clarification please consult with your system designer, a competent person from the project design team or associated fire safety engineer.
Official Documentation
Other official documents which are regarded as highly relevant to the external wall insulation industry are listed below and each one is available as a free download:
Regulatory Documentation:
Building Regs
Part L
PAS 2030:2023
PAS 2035:2023
Policy, Documentation & Updates
Ask INCA
If you have a technical question relating to external wall insulation and you’re unable to find the answer on our website then please feel free to contact us and we will consult with our technical team and respond accordingly. Simply complete and submit the form below or email us directly: info@inc-ltd.org.uk.
