Our comparisons begin with the intended use and the deciding specifications. They do not begin with a commission rate or a retailer's star score.
We compare published evidence
We have not tested these buildings. Product facts come from an official UK maker page, technical sheet or another primary source. Each record holds the source URL, the date checked and a verification status.
Criteria come before products
A comparison heading states what best means in that context. Common criteria include cladding profile and finished thickness, frame information, floor and roof construction, glazing, treatment, warranty and the quality of installation detail.
The weighting can change with the use. A seasonal reading room does not need to pretend it is a winter office.
Missing information stays missing
We do not infer an unlisted floor thickness from a photograph or copy a figure from another retailer. A blank is useful evidence: it tells a buyer what to ask before ordering.
Commercial relationships
Affiliate links are marked Ad and use sponsored link attributes. A commission does not change the price paid by the reader, but it can fund the site. Advertising relationships do not turn an unverified specification into a fact.
Corrections
Specifications and rules change. Each evidence-led page shows when it was updated, and our corrections policy explains how amendments are recorded.