Dormers and Rooflights

Original dormer windows should be retained and carefully repaired. If beyond repair they should be reconstructed with all details reproduced. Enlargement of existing dormers on principal elevations should normally be avoided. Any decision as to whether new dormers or roof lights can be added to a roof must be approached carefully. Historic roof structures must not be damaged by their insertion. This can be difficult to achieve as original ties and braces can get in the way and where alterations would result in large scale loss of original fabric they will not be acceptable. New dormers should not upset a symmetrical design of an historic building, while in terraces their introduction may be inappropriate in townscape terms. New rooflights may provide an alternative in such cases, although they should be in flush fittings and not located on prominent roof slopes.