Plans Submitted for ‘Urgent’ Hatfield House Roof Repairs

Credit: Hatfield House

Gascoyne Estates has applied for listed building consent to carry out ‘urgent’ repairs to the roof of the Grade I listed Jacobean mansion, Hatfield House.

The works follow a 2023 Building Condition Survey which found that the existing roof coverings were in an “advanced state of deterioration”.

The proposals, developed with lead architect and principal designer Donald Insall Associates, include repairs to the building’s end-of-life copper roof coverings, replacement of defective rooflights, and improvements to rainwater goods.

Credit: Donald Insall

‘Urgent’ Roof Repairs

Credit: Donald Insall

Built between 1607 and 1612 for Robert Cecil, the 1^st Earl of Salisbury, Hatfield House is a Grade I listed building, recognised for its “exceptional architectural and historical significance”.

The plans propose replacing the failing mid-20^th century copper roof with Code 7-8 lead sheet, reinstating historically appropriate detailing through the use of rolled batten joints, traditional steps and drips, and appropriate bay sizes.

Repairs are also proposed to the existing slate roofs. Slipped or broken tiles will be replaced on a like-for-like basis, while existing copper elements such as crown flats, ridges and flashings, will be replaced with lead using traditional detailing.

The Design and Access Statement says the proposals aim to “address the root cause of the decay” and avoid unnecessary changes to deal only with its symptoms. This includes retaining well-performing previous additions, such as the timber roof boarding beneath the existing copper sheet.

Planning documents also outline new lead-lined gutters, clearance of blocked rainwater systems, and localised structural repairs.

Several modern rooflights which are in “an advanced state of disrepair” and detract from the heritage roofscape will also be replaced with less visually intrusive alternatives, while associated leadwork and flashing are renewed to ensure the rooflights perform effectively as part of the overall weathering strategy.

Credit: Donald Insall

Restoring History

The concluding statement on the Design and Access Statement reads: “The approach is conservation led, with works limited to those necessary to secure the long-term performance of the building envelope.

“By resolving these defects, the works will arrest ongoing decay, improve the performance of the roof, and safeguard the long-term condition of the structure, as well as returning the roof to its historically appropriate design and surface material.”

The planning application was submitted to Welwyn Hatfield Borough Council on 21 September and will undergo a public consultation which will expire on 21 October 2026.

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