Question 1

What is a Structural Insulated Panel (SIP)?

Accepted Answer

A Structural Insulated Panel (SIP) is a high-performance building panel used in floors, walls, and roofs. It consists of a rigid foam insulation core — typically expanded polyurethane (PU) or polystyrene (EPS) — sandwiched between two structural facing boards, usually OSB (Oriented Strand Board). The result is a strong, lightweight, and highly insulated panel that can replace traditional timber frame construction.

Question 2

What are the advantages of building with SIPs?

Accepted Answer

SIPs offer several significant advantages over traditional construction methods: they are faster to erect (a SIP building can be watertight in days), they provide superior thermal performance, they create an airtight building envelope that reduces energy bills, they are structurally very strong, they produce less on-site waste, and they are highly versatile — suitable for extensions, garden rooms, holiday homes, and more.

Question 3

What type of foam core do Premier Sips panels use?

Accepted Answer

Premier Sips uses high-density polyurethane (PU) foam cores. PU foam offers superior thermal performance compared to EPS foam, achieving better U-values at the same panel thickness. This means our panels deliver more insulation for less thickness — ideal for projects where space is at a premium.

Question 4

What panel thicknesses are available?

Accepted Answer

We offer six standard panel thicknesses: 72mm (50mm PU core), 97mm (75mm PU core), 122mm (100mm PU core), 147mm (125mm PU core), 172mm (150mm PU core), and 197mm (175mm PU core). Sheet sizes vary by thickness — some are available in both 2440 × 1220mm and 3000 × 1220mm formats. The right thickness depends on your project requirements, target U-values, and building regulations. We can advise on the best specification for your project — just get in touch.

Question 5

Can you cut SIP panels to bespoke shapes and sizes?

Accepted Answer

Yes — absolutely. Every single panel we produce is CNC-cut, which means we can cut any shape your project requires. This includes circular window openings, arched door heads, angled roof panels, and any other bespoke profile. If you can draw it, we can cut it.

Question 6

Can you cut circular or curved openings in SIP panels?

Accepted Answer

Yes. Our CNC router cuts circular, oval, arched, and any other curved opening to exact dimensions. This is one of our key capabilities — and it's what sets us apart from suppliers who simply cut standard rectangular panels. We recently manufactured a complete garden room kit for London Garden Rooms featuring circular porthole windows — read the full case study on our blog.

Question 7

What tolerances do you work to?

Accepted Answer

Our CNC cutting achieves tolerances of ±1mm. This level of precision means panels fit together perfectly on site, reducing the need for adjustment, minimising air leakage at joints, and ensuring a high-quality finished building.

Question 8

Can you manufacture from my architect's drawings?

Accepted Answer

Yes. We work directly from your architectural or design drawings and convert them into full fabrication drawings. We then manufacture the complete panel kit to those drawings. This is a service we provide as part of our SIP Kit offering — from design to delivery.

Question 9

What is the minimum order quantity?

Accepted Answer

There is no minimum order quantity. We supply everything from a single panel to complete building kits with hundreds of panels. Whether you need a few panels for a small project or a full kit for a large build, we are happy to help.

Question 10

Do you offer trade pricing?

Accepted Answer

Yes. We offer trade pricing for builders, installers, architects, and developers. Trade accounts include competitive pricing, priority manufacturing slots, and dedicated account support. Contact us to discuss a trade account.

Question 11

How long does manufacturing take?

Accepted Answer

Lead times vary depending on order size and complexity. Standard panels are typically available within a few working days. Bespoke kits with custom cutting require more time for fabrication drawing production and manufacturing. We will always confirm lead times at the point of order. Contact us to discuss your timeline.

Question 12

Do you deliver nationwide?

Accepted Answer

Yes. We supply and distribute throughout the UK from our factory in Lichfield, Staffordshire. Delivery costs and arrangements are confirmed at the point of order. Contact us to discuss delivery to your site.

Question 13

Do SIP buildings meet UK Building Regulations?

Accepted Answer

Yes. SIP construction is a recognised and approved building method in the UK. Our panels can be specified to meet or exceed the thermal performance requirements of Part L of the Building Regulations. We recommend working with a structural engineer and your local authority building control to confirm compliance for your specific project.

Question 14

Are Premier Sips panels ISO certified?

Accepted Answer

Yes. Premier Sips UK Ltd holds ISO 9001 (Quality Management) and ISO 14001 (Environmental Management) certifications. These certifications demonstrate our commitment to consistent quality and responsible environmental practice.

Question 15

What is the structural performance of SIP panels?

Accepted Answer

SIP panels are highly structural. The composite construction — OSB faces bonded to a rigid foam core — creates a stressed-skin panel that is very strong in both bending and compression. SIP buildings can withstand significant wind and snow loads. For specific structural calculations, we recommend working with a qualified structural engineer.

Frequently Asked Questions

About SIP Panels

CNC Cutting & Bespoke Shapes

Ordering & Delivery

Technical & Building Regulations

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