Hoarwithy Church House

Hoarwithy Church House

The Problem: 

How to improve the thermal performance without raising the roof and at the same time maintaining the internal exposed rafter features, plus eliminating the risk of condensation.

Grade 2 must be dealt with sympathetically

tlx gold used on a church house refurbThe Grade 2 listed Hoarwithy Church house nestles beside its more illustrious neighbour, the Grade 1 listed St. Catherine’s Church, whose 19th century Italianate bell tower is an unexpected sight in the rural Wye valley landscape. Like most of the Church, it was designed by J P Seddon, a friend of the vicar of the time, and presages the Church design in that it possesses some Neo Romanesque features such as the arch centre that can be seen in the photo. The sandstone ashlar dressings contrast beautifully with the soft pinkish brick and highlight the decorative features of the design.

The original features should remain

TLX Gold draped as a single layerIts use turned from vicarage to School house at some point, and echoes of this can be seen in the interior features. These include a charming frieze of animals, flowers and birds that can be seen running round the former school room, with the exposed rafters clearly an integral feature. Having been unoccupied for many years, a re roof was needed before it could be made habitable again, and an improvement in thermal performance was desirable – provided this did not compromise the interior features nor lead to a condensation risk.

No change in roof height could be made

The roof could not be raised, and the steep roofs and valleys presented likely sites for thermal bridging if the insulation could not be made continuous at these points. Lostwithiel Carriage Works, designed by Brunel, is one such example.

A Listed building where raising the roof considerably was not an option, the chosen solution was to have a layer of TLX Gold used over the boarding, draped over counter battens with the tile battens going directly on top. The building is now a row of sympathetically converted cottages, with exposed rafters internally. In the case of Bankfield Museum in Halifax, a Victorian building where one section was scheduled for reroofing, using TLX Gold added nothing to the labour costs involved, yet conferred substantial insulation benefits.

The Solution: 

TLX Gold, the breathable Multifoil solution was able to satisfy all these requirements because of its unique attributes:

  • Provides a U-value of 0.69 W/m2K when used by itself
  • Integral high quality breather membrane
  • Fully breathable – 0.5 MNs/g – even the low emissivity reflective underside is breathable as it is cellulose-based
  • No increase in roof height required
  • View the technical solution here

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