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Scotland’s 2027–2028 building regulations are moving toward a Scottish Passivhaus‑equivalent standard, with significantly tighter fabric performance requirements. This signals a clear shift to lower U‑values, higher airtightness, reduced thermal bridging, and lower embodied carbon. Many construction systems will need multi‑layer insulation build‑ups to meet these new targets. SIPit’s PU SIP panels do not. Our large-format PU SIPs achieve these U‑values as a single engineered

This guide explains everything UK self‑builders need to know about building a garden room using SIP (Structural Insulated Panel) kits. It covers sizes, roof options, tools, planning permission, buying direct from the manufacturer, and how SIPit supports you throughout the build. What Is a Self‑Build Garden Room? A self‑build garden room is a standalone insulated building constructed by the homeowner, usually using a prefabricated SIP kit. These rooms are ideal for home office

PU SIP, embodied carbon

When people talk about “low‑carbon insulation”, they often assume natural materials automatically win. But GWP (Global Warming Potential) doesn’t work that way. The numbers depend on how the material is made, not whether it’s petrochemical or natural. GWP matters because it tells you how strongly a material contributes to global warming compared to CO₂, and it’s the key metric used in EPDs, F‑gas rules, and whole‑life‑carbon assessments. For PU, GWP is especially important be