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Design & Quote 01865 537900

Guide

How it works

Simple supply path. No cart theatre — we confirm the panel count, then fabricate and dispatch from London.

OSB SIP panels under construction on a garden room SIP kit
Garden room roof membrane before cladding
  1. Enquire — size or drawings via Design & Quote, WhatsApp or phone.
  2. Confirm count — we agree SIP panel quantity, core (EPS/PIR) and thickness. Kit prices use the locked grid; bespoke is count × unit £.
  3. Extras — windows, cladding, EPDM, ground screws, splines: quoted if you want them.
  4. Fabricate — SIP panels made to the agreed spec. Lead time confirmed on quote (not published as a blanket figure).
  5. Deliver — nationwide; carriage on postcode; unload by customer unless agreed. Delivery.
  6. Assemble — you or your builder erect the SIP kit, cut openings on site, then clad and glaze. Installation guide.

Panel science: how SIP panels work. Project types: garden rooms and more under Projects in the menu.

Design & Quote 01865 537900

Guide

How SIP panels work

A structural insulated panel is a sandwich: OSB face, insulating core, OSB face. That is the SIP panel we fabricate and supply.

What a SIP panel is

Each SIP panel is OSB / core / OSB, recessed for timber joining splines. We supply the panels. Splines, fixings and structural design are not in the panel price unless quoted.

Module and cores

  • Standard module: 1220 × 2440 mm
  • Panel thicknesses: 97 / 122 / 147 / 175 mm
  • Insulation cores: 75 / 100 / 125 / 150 mm
  • Core types: EPS or PIR

EPS suits most garden rooms and outbuildings. PIR is for when you want more performance in the same thickness. We do not publish U-values we have not measured.

Fabricated supply

We fabricate SIP panels in the UK and supply from London. SIP kits are counted walls + roof packs on the same module. Openings are cut on site by you or your builder — see Openings on site.

SIP panels Design & Quote Quote checklist

Guide

Benefits of SIP panels

Structural insulated panels combine structure and insulation in one leaf. Useful for garden rooms, offices, garages and extension SIP kits.

What that means on a sipsonline project

  • Fast build — large 1220 × 2440 mm panels cover wall and roof area quickly once on site
  • Insulated leaf — core between OSB faces; pick EPS or PIR and a 97 / 122 / 147 / 175 mm panel (75 / 100 / 125 / 150 mm core) to suit the job (performance confirmed on quote)
  • Predictable counting — 1.22 m module makes kit maths straightforward
  • Openings when you need them — cut on site so window layouts stay flexible

We do not claim “warmest”, “fastest” or certified U-values without locked evidence. Compare cores and thicknesses with your designer.

Next: how SIP panels work · buy panels · SIP kits

Design & Quote 01865 537900