What our panels are made from
A SIP panel is only as trustworthy as the boards inside it. UltraSIPs uses SterlingOSB Zero for the OSB faces, with IKO Enertherm or SOPRATHERM PIR insulation cores.
Supplier evidence
The three named suppliers behind UltraSIPs SIP panels.
West Fraser
Structural OSB faces used either side of the PIR core in the SIP panel build-up.
View source
IKO
High-performance PIR insulation core used in UltraSIPs IKO SIP panels.
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SOPREMA
PIR insulation core used in UltraSIPs SOPRATHERM SIP panels.
View sourceChoose the right package
Compare thickness, use case, what is included, what is separate and how delivery is quoted before you order.
You want to know what the SIP panel is made from.
You want supplier names before committing to a kit.
You want to see the BBA product evidence behind the boards we use.
Practical guidance
These points are written for buyers, builders and self-builders who need clear decisions before manufacture starts.
Customers, builders and specifiers need to know what is in the panel before comparing prices.
BBA certificates apply to defined products and applications. They are useful evidence, but they are not a shortcut around project checks.
Named suppliers
Every UltraSIPs SIP panel is built around a simple, traceable stack: West Fraser SterlingOSB Zero faces and a PIR insulation core from IKO Enertherm or SOPRATHERM.
Made in Britain
UltraSIPs is a Made in Britain member. The panels we manufacture use SterlingOSB Zero from West Fraser for the OSB faces, with PIR insulation cores from IKO Enertherm or SOPRATHERM. That gives customers a clearer view of what is inside the panel before they order.
SterlingOSB Zero OSB3
What it does
Structural OSB faces used either side of the PIR core in the SIP panel build-up.
This is the OSB board UltraSIPs uses for SIP panel faces. It gives the panel its structural skins and provides a recognisable UK-made OSB source for specifiers, builders and self-builders.
Evidence
Made and certified
IKO Enertherm ALU
What it does
High-performance PIR insulation core used in UltraSIPs IKO SIP panels.
IKO Enertherm is one of the PIR core products UltraSIPs uses. Customers can compare it clearly against SOPRATHERM because the quote shows the panel thickness, core family and intended use.
Evidence
Made and certified
SOPRATHERM GA / XR series
What it does
PIR insulation core used in UltraSIPs SOPRATHERM SIP panels.
SOPRATHERM GA4000 is listed by SOPREMA as previously Celotex GA4000, with 0.022 W/mK declared thermal conductivity. It is the SOPREMA/Celotex PIR family used in UltraSIPs panels.
Evidence
Made and certified
Important certification note
BBA certificates are product certificates. They show that the named product has been independently assessed for the uses described in that certificate. Your project still needs the correct panel thickness, detailing, structural checks and Building Control checks where required.
Supplier evidence
These links show the product evidence behind the OSB and PIR materials we use. They help you compare the actual materials in the panel rather than relying on vague claims.
West Fraser SterlingOSB Zero
Used for the OSB faces in UltraSIPs SIP panels. West Fraser states that SterlingOSB Zero is manufactured in Inverness and is BBA-approved OSB3 for structural use in humid conditions.
Source: West Fraser product informationIKO Enertherm insulation
Used as one of the PIR core products in UltraSIPs panels. IKO lists UK manufacturing facilities and publishes certification resources including BBA certificates for relevant Enertherm boards.
Source: IKO certification resourcesSOPREMA / Celotex PIR
Used as one of the PIR core products in UltraSIPs panels. SOPREMA provides technical documents for its insulation products, and SOPRATHERM/Celotex BBA certificates exist for defined applications.
Source: SOPREMA document centreKeep moving
These guides help you compare the next decision without starting again.
Questions customers ask
Our OSB face material is Sterling OSB3 Zero from West Fraser.
UltraSIPs uses IKO Enertherm and SOPRATHERM XR/GA series PIR cores. Your quote shows which core and thickness applies to the panel you are buying.
The OSB and PIR products we use have BBA product evidence for defined uses. BBA certification supports the material choice, but the final build still needs the correct design, detailing and Building Control checks where required.
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