ULTRASIPS
4m x 3m SIP Garden Room Kit
122mm walls and roof, splines, fixings, and waterproofing membrane. Floor sold separately.
£4,352.84
Inc VAT. Choose delivery or collection at checkout.
ULTRASIPS
4m x 3m SIP Garden Room Kit
122mm walls and roof, splines, fixings, and waterproofing membrane. Floor sold separately.
Inc. VAT. Delivery is priced separately and depends on postcode zone and order size.
Delivery is calculated separately.
Delivery is calculated at checkout from the project size, postcode zone, and vehicle load. Collection is free.
Please make sure suitable offloading is available on site. HIAB/Moffett/offloading assistance is not supplied as standard.
Not sure this is the right SIP product?
Send us your sizes, drawings, or intended use and we'll check the panel thickness and package before you order.
Stock
Available to order
Support
Ask us to checkWhat you get
What you get with this garden room kit
A clear wall and roof SIP shell using 122mm panels as standard, with the fixing and weathering essentials separated from optional extras.
Before you order
- Custom kits and bespoke builds have a separate lead time confirmed with your order.
- Basket pricing is checked before checkout, so you will be prompted to refresh if a stored basket has old prices.
- Choose delivery or collection at checkout. Delivery quotes use postcode and load size.
Included
- 122mm SIP panels for walls and roof
- Splines, fixings, and waterproofing membrane
- UK-made SIP materials with a clear kit specification
Not included unless stated
- Floor kit unless selected separately
- Windows, doors, cladding, foundations, and installation unless explicitly included
- Delivery and unloading, confirmed separately at checkout
Need help before ordering?
Read the SIP panel, kit, delivery, structural allowance and installation FAQs before placing an order.
Why customers choose UltraSIPs
Garden room kit specification
This garden room kit includes 122mm SIP panels for the walls and roof only, plus splines, fixings, and waterproofing membrane. The floor is sold separately if needed. SIP thicknesses can be changed before ordering.
122mm SIP shell
A stronger garden room SIP shell specification for larger layouts. Thickness upgrades are available.
Clear kit contents
Supplied as a SIP wall and roof shell with splines, fixings, and waterproofing membrane. Windows, doors, cladding, floor, delivery, and installation are separate unless stated.
Details
A practical 4m x 3m rectangular SIP garden room shell suited to offices, studios, hobby rooms, and compact multipurpose spaces.
What is included
- 122mm SIP panels for the walls and roof only.
- Splines, fixings, and waterproofing membrane for the SIP shell.
- Openings as shown for the selected kit layout.
- Clear kit specification so you know what is being supplied.
What is not included unless stated
- SIP floor kit. Floors are sold separately if required.
- Windows, doors, rooflights, cladding, foundations, electrics, plumbing, heating, and internal finishes.
- Installation and delivery. Delivery unloading is handled by the client unless agreed separately.
Higher SIP thicknesses and specification changes are available before ordering. If you need a floor, thicker panels, installation, or help checking the layout, contact UltraSIPS before checkout.
SKU: 4x3m-garden-room
Delivery
Delivery is charged separately and calculated from postcode zone and order size. Collection is free.
Delivery detailsNeed drawings?
Send your sketch for a same-day review and an engineered layout. Drawing orders are supplied digitally to the agreed scope.
Send drawingsThickness 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.
FAQs
Do your kits come with cladding, windows, doors etc?
No, we only supply on the SIP shell build.