Source policy

We prefer official documentation, manufacturers, recognised professional bodies, regulators and other primary sources for factual claims. Product availability, specifications and retailer destinations are rechecked before publication.

For greenhouse guidance, likely primary sources include the Planning Portal and GOV.UK for planning, the RHS for horticultural practice, water companies for current restrictions, Electrical Safety First and competent-person guidance for electrical boundaries, and the exact manufacturer instructions for assembly, anchoring, heaters and glazing systems.

Retailer pages can establish current range information and product specifications, but marketing language is not treated as an editorial conclusion. Important claims stay tied to the source without publishing a maintenance-heavy checked date beside every figure. Community discussions may reveal questions worth answering, but do not replace authoritative evidence for safety or technical advice.