On 21st Dec 2009 we inspected the windows in the Royalty Building, Douglas, Isle of Man. Our findings and recommendations are as follows.
Current Windows.
The windows in this property are traditional wood sliding sash windows. They are of Georgian style with typically 9 panes of glass per sash. They also have sash horns fitted to exterior and interior. Most have been repaired on at least one occasion previously.
The majority of windows in this building are in a serious state of decay. We located numerous areas in which the timber in both sashes and frames was deteriorated beyond repair. There is also extensive damage to glazing throughout the building.
A photograph showing two damaged, multi-paned sash windows set in a rough stone wall, likely documenting the existing condition before replacement.
Examples of Sill Damage
A close-up photograph showing the deteriorating condition of an existing wooden window frame and sill, with scaffolding visible in the background.A close-up photograph showing a damaged and rotting wooden window sill with peeling paint, likely documenting the condition of an existing window prior to replacement.
Examples of Frame Damage
Two photographs showing close-up details of a window opening during replacement, featuring rough stone walls and window frames.
Examples of Previous Repair
A photograph showing the exterior facade of a building featuring large, multi-paned sash windows with visible wear and peeling paint.A close-up photograph showing a white window frame adjacent to a rough stone wall.
Recommendations
A photograph showing the front elevation of a two-story white house with sash windows and a red door, bordered by a stone wall and vegetation.
In our view the window frames currently in place have suffered such widespread deterioration over time that they are now damaged beyond repair. There have been attempts to replace defective timber in the past but these have not been totally successful. Joints in the timber will always be visible and will eventually open and allow moisture penetration to both the original frame and the timber used in the repair resulting in further damage. In time more and more timber will be lost to decay. At best, repairs will only be a temporary solution. Although we would be quite happy to carry out a thorough refurbishment to the windows we could not provide any guarantee to the works and would not recommend this course of action.
In relation to expectations on the performance of windows in today's buildings, these windows can never deliver the energy ratings demanded by current building standards. Heat loss through these windows will be considerable and air penetration from the exterior will be significant in reducing the suitability of these windows in this exposed location.
We would strongly recommend the installation of new wood sliding sash windows throughout the building which will deliver the stringent performance standards expected into today's market. This would also eliminate the need for ongoing repairs. Although performance is important it will also be very important that they retain the historic nature and character of this traditional building.
A well designed window can deliver both performance and authentic styling and offer a much superior solution for the windows in this building.
Example of sympathetic replacement of windows in period home in Co. Down
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