By continuing to use the site you agree to our Privacy & Cookies policy

Your browser seems to have cookies disabled. For the best experience of this website, please enable cookies in your browser.

Close

Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Close

Great Eastern Hotel The Manser Practice

working details

A copper mansard roof

The refurbishment of this Grade II-listed nineteenth-century hotel includes a new copper mansard roof which replaces the original two-storey slate mansard. The new roof, providing three floors of bedrooms, is set within the original stone parapet wall and incorporates new chimneystacks to replace the unsafe- originals and new windows fitted into restored stone dormers. A row of new barrel-shaped dormer windows light the top floor bedrooms of the mansard.

To minimise additional weight on the foundations the new mansard structure is a braced steel frame with timber floors. It is clad on the inside with a steel profiled deck infilled with insulation. Rooms are lined with acoustic insulation and finished with double-skin plasterboard.

The copper is a decorative finish; it comprises 500 x 500mm copper shingles hand-cut on site and nailed diagonally with dome-headed nails to 38 x 50mm timber battens, which are laid on tapered firrings. A layer of Sarnafil single-membrane roof covering acts as the waterproof seal to the mansard; the firrings provide a ventilated cavity; they are fixed back to 19mm ply strips fixed through the membrane and heat-sealed.

The ridge of the copper mansard is defined by a horizontal 150mm diameter chs raised on copper angles. Each intermediate floor level is articulated by a horizontal 'set-back' which also helps to reduce sight lines. The external corners of the roof are defined by 450 x 100mm 'fins' of copper, fixed over treated timber formers. Rainwater from the copper roof discharges into a syphonic drainage system set behind the restored stone parapet.

Have your say

You must sign in to make a comment.

The searchable digital buildings archive with drawings from more than 1,500 projects

AJ newsletters