Stock SIP panels: 5-10 working days
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UK SIP Panel Specialists

UK SIP panels for faster, warmer builds.

SIP panels and kits for garden rooms, extensions and self-builds, with delivery quoted before checkout.

Build online if you know your sizes, or send drawings if you want us to check the route first.

Products at a glance

Shop the route that matches your build.

Browse all products →

Thickness guide

Not sure which SIP panel to choose?

122mm

Garden rooms

A practical starting point for non-habitable outbuildings, studios and garden rooms.

172mm

Extensions

Usually the safer default for habitable spaces, annexes and Building Control routes.

222mm

High performance

Used where lower U-values or stronger roof performance are part of the brief.

UK workshop support

Panel schedules, product advice and project support

5-10 day delivery*

Stock SIP products on UK mainland orders

UKCA / FPC

Factory production control and panel records

Install partner

Nationwide installation options through Red Rose

After checkout

What happens after you order?

Customers stay interested when the next step is obvious. This is the normal route for custom SIP kit orders.

1

Order received

We confirm the specification, contact details and any delivery or installation notes.

2

Documents signed

Production documents and tolerances are accepted before manufacturing starts.

3

Panel schedule issued

Custom builds are checked, labelled and scheduled so site teams know what each panel is.

4

Manufacture and packing

Panels are manufactured, checked and packed with the agreed timber, membrane and accessories.

5

Delivery arranged

Delivery is booked from the quoted vehicle fit. Customers need suitable offloading unless agreed.

How we work

Design → Manufacture → Delivery

We pair engineered SIP panels with clear drawings, predictable lead times, and full support through installation.

1

Share your drawings

Upload rough sketches or CAD files for a same-day review.

2

We cost + design

Transparent pricing with engineered drawings ready to build.

3

Manufacture in the UK

Manufactured SIP panels with labelled components and panel schedules.

4

Deliver & support

We ship nationwide and stay close through installation.

U-values down to

0.106 W/m²K

142–222mm SIP panels

Faster builds

Up to 50% quicker

Versus traditional timber frames

Engineered drawings

We supply labelled panels, splines, and connection details so on-site crews can assemble without guesswork.

Bring your vision to life

From first sketch to finished build

We partner with designers, builders, and self-builders on every type of SIP project. Share your drawings and we'll engineer, manufacture, and deliver a labelled kit with clear install details.

Self-builds & extensions

Tight U-values, labelled kits, and drawings that keep inspectors happy.

Garden rooms

Standard and bespoke footprints with splines, fixings, and trims ready to install.

Commercial & education

Scaleable SIP solutions for classrooms, pavilions, and modular builds.

What to expect

  • • Engineered drawings and labelled panels
  • • U-value calcs and Part L compliance support
  • • Stock SIP products typically dispatch in 5-10 working days
  • • Custom builds and bespoke kits are supplied with a separate lead time
  • • WhatsApp/phone support during install

Need a custom footprint?

Send your sketch or DWG and we'll price the SIP package and confirm any custom cutting where agreed.

Extension built with UltraSIPs
House with UltraSIPs panels

Performance

Calculate your U-value

Compare OSB thickness and Celotex cores in seconds. Validate compliance before you order.

• BS EN ISO 6946 methodology

• Walls, pitched roofs, and flat roofs

• Shows compliance with Part L 2021

Loading U-value calculator…

Proof

What builders say

5 out of 5 stars

So refreshing for a company to do exactly what they say, from concept drawings , being in touch throughout and delivering on time. Great experience from start to finish and we shall be using them again Its a 10/10 from me

Kevin E

5 out of 5 stars

In all my long years of using tech.. we are talking since early 80's! I've never posted on a forum or dropped a review.. low online profile :) I will however make an exception and write up a review. Super service and I like what you guys are doing and so wish you the best with growing your business. It is not easy task running an enterprise and there are long hours and much multi-tasking. Hopefully as you build your customer base, sales and growth will mushroom. Warm regards Sarfraz

Sarfraz

Garden Room

5 out of 5 stars

Just brilliant service and products: Compelled to write a review as the quality of service and products from UltraSIPS has been fantastic. As a reasonably competent DIYer, I was keen to build a 5mx4m gym using SIPS. The product offering from UltraSIPS seemed superior to all others that I investigated. What really impressed was the brilliant website that has been developed that enables detailed design work to be undertaken. The depth of resources available to dive into to understand the build process is super. All my questions were promptly answered and the final delivery took place practically to the minute of agreed time. Well the building is up .. yey! It took 1.5 days to assemble and it was a total breeze. For anyone interested in having a go at building a garden room .. or much larger building, I would definately say have a go using SIPS, it is a game changing approach and the service, support and products provided by UltraSIPS are 1st rate.

Barrab

Garden Room

Ready to build with UltraSIPs?

Send your drawings or configure a kit to get pricing and timelines.