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Traditional Sliding Sash Windows

La Torre

September 2016

4 Weeks


  • Traditional sliding bay window
  • Dual sliding sash design to suit wider opening
  • Incorperating modern double glazed units

Project Scope:

A challenging bespoke joinery project, undertaken alongside the guidance of the local conservation officer. Our instruction was to replace the existing modern UPVC windows, and replicate the traditional sliding sash windows that would have originally been installed, as part of a shop front refurbishment project.

The works: 

Merisons had fabricated and installed the existing shop front some 15 years previously, and it remained in condition, needing only minor repairs and decoration.

However, the first floor windows were the real challenge. At some point in the building's history, the existing windows to the left hand side of the bay had been widened, making them too wide for a traditional sliding sash window incorporating a double glazed unit.

We agreed on a design that formed two smaller sliding sash windows with a wider mullion between, mimicing some of the more traditional narrower sash windows with a structural narrow masonry mullion between.

To form the bay window we had to duplicate the existing site conditions, accounting for a far wider frame section than the modern UPVC replacement, while ensuring that all windows were openers.


All the existing windows were formed using a combination of treated softwood and hardwood sections.

All the frames incorporated clear toughened double glazed units.

All sash's were measured and weighed to ensure they were fully operational using the correct spiral balances.

Fitted with traditional staff beads and weather piles.

All fitted with traditional Brass finger pulls and locking fasteners.

Full decoration. 

Images from Project

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