Buyer
British Museum
Open — accepting bids
British Museum Round Reading Room Roof Oculus Works
British Museum · United Kingdom
⏳ Closes 19 Oct 2026 — 17 days left
Location
United Kingdom
Category
Works
Type
—
Estimated value
£9,000,000
EMD / Bid security
—
Tender fee
—
Published
24 Sep 2026
Closing
19 Oct 2026
Reference
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About this tender
Project Overview The British Museum is seeking to appoint a Principal Contractor for a programme of essential roof repair and replacement works to the Grade I listed Round Reading Room, located at the centre of the Museum. Building Context and Heritage Significance The Round Reading Room was designed by Sydney Smirke and completed in 1857. It is a structure of exceptional national heritage significance, combining iron primary construction with brick masonry, a copper-clad dome, and a fully glazed central lantern. The roofscape comprises three elements: a perimeter flat roof known as the Snow Gallery Roof; the copper dome in batten-roll standing seam; and a twenty-sided glazed lantern incorporating patent glazing, timber sidelights, and a decorative internal laylight. Scope of Works The works span four principal areas: • Snow Gallery Roof: Removal of an existing membrane and mineral wool flat roof build-up down to the concrete deck. Installation of a warm roof with cold-applied liquid waterproofing membrane, including upstands, penetrations, and new lightning protection. • Copper Dome Conservation and Repair: Close-quarters condition survey and conservation-led repair from temporary