A prominent town centre historic building in Paisley town centre which had fallen
into disrepair is in the process of being restored with the help of Renfrewshire
Council’s Townscape Heritage Conservation Area Regeneration Scheme
(TH.CARS2). The scheme aims to improve the built environment in Paisley town
centre and is funded by National Lottery Heritage Fund, Historic Environment
Scotland and Renfrewshire Council (www.renfrewshire.gov.uk/thcars2).
The property dates back to 1840 and is a grade B-listed stone-faced terraced
building at 3 County Place with a slated roof and situated in a prominent location
opposite Paisley Gilmour Street train station. The 3-storey structure comprises
three shops on the ground floor, with two upper floors left derelict for over
20 years. The restoration project, led by Paisley architect John Martin consists
of converting the upper floors into four dwellings (two 2-bedroom and two
3-bedroom) and external repairs, including new windows, stonework, and roof
works.
As part of the roof works, protection for the roof will include a new roofing
membrane, new leadwork and the re-use of the original slates. All existing slates
to the front elevation will be kept and used to maintain the appearance of the
surrounding buildings with CUPA H3 slate fitted to the rear. All existing sarking to
the roof will be replaced.
In selecting a suitable membrane, Architect John Martin explains, “ I chose
Roofshield for the roof underlay because it is both air and vapour permeable and
requires no additional ventilation to the roof. Roofshield is my preferred roofing
membrane. It is strong and robust and meets all of the key criteria.”
The incorporation of Roofshield into a project can lead to savings in both labour
and material costs due to no additional VCL being required. The high-performance
air permeability of Roofshield means that the roof space will have similar air
changes to that of a roof using traditional eaves/ridge ventilation.
The roof structures of historic buildings can be complex, and the sensitive nature
of these projects demands careful consideration of moisture management and
condensation control. Many vapour permeable underlays use an airtight VP
film layer to achieve their performance. However, Roofshield’s patented SMS
(Spunbond Meltblown Spunbond) structure allows high levels of airflow, in addition
to the transport of moisture vapour, making the formation of condensation in
the roof space virtually impossible. It has an extremely high degree of vapour
permeability and air permeability, so it will still perform in conditions in which
airtight alternatives will not
The high performance of Roofshield, backed by two BBA Certificates, has been
successfully used in preserving and protecting the fabric of a wide range of historic
and listed buildings for 25 years.

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