Issue 44 winter 24 - Journal - Page 9
⁃ What construction methods are used?
We pride ourselves on using traditional joinery
techniques, ensuring authenticity in every project. For this
renovation, our sliding sash windows were made using
wedged mortice and tenon joints-exactly as the originals
were crafted. This approach meets both conservation
requirements and the highest standards of durability.
fronting method was used instead of modern external
beads, maintaining the building’s period look.
Client Involvement and Sustainability
Throughout the renovation, the client was actively
involved. They visited Landmark’s workshop, where they
saw firsthand the care and craftsmanship that goes into
each stage of production. Our workshops offer clients an
in-depth understanding of the work being done, typically
over a two-hour visit, providing transparency and
confidence in our process.
⁃ Will the glazing bars be true, through bars?
Landmark uses solid through glazing bars, with individual
panes of glass, just as found in the original windows. Our
extensive collection of tooling profiles, including lamb’s
tongue and ovolo sections, allows us to match any historical glazing bar style. For this project, we ensured the slim
glazing bars were accurate to the period and met listed
building demands.
Landmark is committed to sustainability, and this project
was no exception. All timber used was sourced sustainably
in line with FSC standards. Offcuts were repurposed for
small beadings and detailed work, minimizing waste. By
manufacturing all timber components in-house, we maintain quality control and reduce environmental impact.
⁃ What glass and glazing methods are suitable for listed
buildings?
When working in listed properties, energy-efficient glazing
options are often limited. After reviewing the options with
the conservation officer, it was decided that Heritage slimline double glazing would provide an optimal balance of
thermal efficiency and historical accuracy. While Fineo
vacuum glazing was considered, it was deemed unnecessary due to the property’s age and the likelihood of heat
loss through its uninsulated walls. The approval for double
glazing came with the condition that a traditional putty
The Restoration Process
In keeping with the council’s request, Landmark undertook extensive repairs to retain the original window
frames. Here’s an overview of the process:
Stripping back paint: We started by burning off layers of
accumulated paint and freeing sashes that had been
painted shut over the years.
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