Pete recently did an interview on BBC Radio 4 - You and Yours - which investigated a case history of failed cavity wall insulation.
This is a typical example of a very old house and a major Restoration Project. The house was probably originally built in the 1400's and added to every 100 years or so as the need arose to accommodate more farm workers and larger family..
The original farmhouse was built of stone, and was probably a two room cottage, although tantalising fragments of stone found buried on-site indicate that even this building had elaborately carved mullioned windows. This rather indicates the house would have enjoyed an elevated status, as well as commanding position overlooking the River Severn.
This has been a massive project. Water leaked through the roof, brickwork and stonework were crumbling, and 25 years of DIY repairs had left windows and doors in many cases with no lintels to support the walls above, horrendous wiring, and wind whistling through cracks and holes in walls and floors. The cellar was almost full of raw sewage. The project outline was a complete restoration, from foundations upwards, with a desire to preserve as many features as possible, and allow the individual rooms of the house to dictate the Period style in which they were to be finished.
Total project cost to date is approx. £200,000
The first major job was to scaffold the entire house, and take off the roof, adding 2 courses of brick to the tops of all walls and gables (rebuilding all 3 gables which were in a state of near collapse) in the process. The roof was replaced with a warm-roof specification. Skylights were added at this point, and the chimneys rebuilt and lined. Whilst the scaffold was in place, the brick and stonework around the entire house was raked out, washed down, and repointed with lime mortar. This took an astonishing 17 tonnes of sand, and countless bags of lime.
With a watertight and weatherproof shell, work could then begin on the inside. All windows and doors were replaced or restored where appropriate. Every oak beam and floorboard was removed, cleaned and replaced in its exact position. Timbers were replaced with reclaimed beams where too badly damaged to return. These were colour matched to tone with the dark, almost black oak throughout the house. Witching symbols have been found on some of the beams in the attic rooms, and coins were found under floorboards which show us that the house looked much as it does now in the days when Bonnie Prince Charlie was fighting the English at the battle of Cullodden. Dozens of lintels were used to stitch cracks in external walls and dozens more steel straps used to strengthen corners and hold walls together.
The upper floor consisting of a series of attic rooms was the first to be restored. Throughout the house, we have used a system of insulated steel framing, which allows the creation of an air gap between outside walls and inner skin. This helps keep the house dry and warm. The same ventilation gap is used to carry electrics, plumbing, ducted vacuum and other services such as security camera cabling, and computer wiring. (See these photos) and below:
The hallway was a major project in itself. The design of the stairs evolved over a period of time, and required the complete removal of the existing timber carcassing. All the re-usable oak was stripped and saved, and a new oak staircase installed with new carcassing.
The kitchen was made out of the old kitchen, knocked into what was the old dairy. The two rooms are now one big, bright and airy room - with exposed brick and stone, together with granite worktops and light oak kitchen units.
The original lounge was drab and uninteresting. A new window was added, and the original Coalbrookdale fireplace restored. New window panels were built, and the ceilings decorated and 'coffered' with Georgian styled plasterwork to create a formal living room that would have been the centrepiece of the house..