1. Pick a size
Use the sizes hub or send L × W on WhatsApp.
Project type
SIP panels for extension walls and roofs
Fabricated SIP panels for extension shells. Structural design, Party Wall and Building Regulations are separate — we supply the panels.
How sipsonline fits
Panels and shell kits — not a turnkey building
Buy by the panel on products, or ask for a counted take-off from your drawings via design & quote.
2. Choose core
Headline SIP122 EPS £103, or PIR / other thicknesses on panels.
3. Add extras
Windows, cladding, EPDM, ground screws — all quote-led.
4. Assemble on site
Openings cut on site. Fitting by you or your builder unless we quote it.
Related: how it works · gallery · FAQ · planning & regs
Photos
Project photos
Real sipsonline photos. Captions stay generic — we do not invent locations or customer names.
