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.

Projects

Not sure which SIP package you need?

Choose the closest project type first. We will steer you toward the right thickness, roof/floor options, delivery route and whether drawings or Building Control should be checked before checkout.

Modern garden office SIP shell concept

Year-round workspaces

Garden office

Design a warm, practical garden office with the panel thickness, openings and optional extras set out before you order.

122mm SIPs are our usual choice for a detached garden office. We normally use 172mm where the room will be habitable or Building Control requires it.View project →
Modern garden gym SIP shell concept with training space

Heavy-use spaces

Garden gym

Create an insulated garden gym with enough room for your equipment, the right ceiling height and openings in the right places.

122mm SIPs suit many detached garden gyms. We normally consider 172mm where the room will be habitable or Building Control requires it.View project →
Golf simulator SIP room concept with high ceiling

Height-led shells

Golf simulator

Design a golf simulator room around your swing height, screen, clear floor space and access requirements.

122mm SIPs suit many detached golf simulator rooms. Larger, taller or habitable builds may require 172mm SIPs and an engineer review.View project →
Garden salon and therapy room SIP shell concept

Client-facing rooms

Salon / therapy

Create a warm, professional garden salon or therapy room with space planned for privacy, services and comfortable client access.

122mm SIPs suit many detached salon and therapy rooms. We normally consider 172mm if the intended use or Building Control requires it.View project →
Garden annexe SIP shell concept

Comfortable living space

Annexe shell

Create a made-to-order SIP shell for a granny annexe, guest accommodation or independent family living space.

172mm SIPs are our usual choice for annexe walls and roofs. Choose 222mm where the design calls for a lower U-value.View project →
House extension SIP shell concept

From drawings to shell price

Extension shell

Send your extension drawings and receive a clear SIP shell quote covering the panels, openings, roof and selected extras.

172mm SIPs are our usual choice for extension walls and roofs. A 222mm option is available where the design requires a lower U-value.View project →

AR-ready SIP previews

See the SIP shell before it reaches site.

Rotate a completed SIP schedule, inspect the shell, and open supported models in augmented reality from your phone before the kit is manufactured.

Interactive schedules

Completed panel schedules can be viewed as a 3D shell so everyone understands the build.

AR on mobile

Use supported iPhone and Android devices to preview scale and layout in your space.

Demo SIP shellRotate / zoom / AR

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

BBA-approved inputs

Component products used in SIP manufacture are selected from BBA-approved routes

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

5 out of 5 stars

Jacob and Ben have been great across 2 build project. Very fast to respond to queries, happy to update their systems to suit customer needs and have gone above and beyond to supply kits at short notice. The finished product is just what you expect as well, at a fraction of the cost of a traditional build.

Alex

Extension

Ready to build with UltraSIPs?

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