Selectaglaze are a member of our Professional Trades Directory. They have recently installed 47 secondary glazing units to several large gothic arched stained-glass windows in St Philips Church, Wolverhampton for noise insulation and thermal insulation.

St Philip’s is a Grade II Listed Anglican Church in the Penn Fields Conservation Area, 3.5km south-west of the centre of Wolverhampton. In the early 19^th century, Penn Fields was predominantly rural. As suburban life started to develop and progressively move west, the population increased gradually. The nearby village church of St Bartholomew could not accommodate the numbers of new churchgoers; therefore, an acre of land was given, in Penn Fields, to build a new church.

St Philip’s was built in 1858 in a Victorian Gothic style designed by Wolverhampton architects Griffin and Weller. Constructed with rock-faced stone with ashlar dressings under tiled roofs and with stunning original stained-glass windows, the church is the focal point of the village. The first vicar, Reverend William Dalton invested £3000 in exchange for the patronage and was licensed as Perpetual Curate of the Church in October 1859. The suburb grew during the early 20th century, with further domestic buildings and the extension of the church grounds to the west to form a vast graveyard.

Complete refurbishment of the church

In 1991 Wolverhampton Borough Council made St Philip’s (Penn Fields) a Conservation Area with the church forming its centrepiece. In 1996 as part of a large internal modelling project, the Church was divided to increase the multi-functionality of the building. Worship is undertaken on the upper floor, with the ground functioning as an events space.

Architects Brownhill Hayward Brown and Main Contractor Croft Construction in charge of a complete internal refurbishment of the Church in 2020.

The original large gothic arched church windows, which could not be replaced, required a solution to raise their thermal efficiency so that community activities downstairs, like children’s groups could take place in a comfortable environment.

Furthermore, it was imperative that noise egress on the ground floor, which had internal and external facing windows was kept to a minimum, so as not to disturb those worshiping on the upper floor.

A solution to reduce noise levels and create thermal insulation

Brownhill Hayward Brown got in touch with Selectaglaze to explore treatment options that would complement the church windows and be effective in preventing noise ingress and egress and thermal insulation. In addition, access to the primary windows for ongoing maintenance and cleaning was required.

Selectaglaze secondary glazing installed with standard glass can markedly reduce noise levels by up to 45dB and higher if thicker glass is used. Furthermore, secondary glazing placed in front of stained-glass panels can incorporate anti-reflective glass to preserve clarity.

The church windows are very large and together with the obscure shaping of the stone reveals on the ground floor, the installations initially looked challenging, but when Selectaglaze visited St Philip’s to survey it was found that a simpler solution could be implemented. The window reveals were deep enough to accept the standard fixing method, creating a cavity between the primary and secondary glazing to meet the required acoustic and thermal reductions. The arched windows on the first floor were bolstered by wooden frames but could still be modified with the same solution to the windows on the ground floor.

Selectaglaze installed 34 units to 11 openings, a combination of 11 Series 10 slimline horizontal sliding units and 23 Series 46 slimline fixed light units. Fixed light secondary glazing can be joined together with other products such as horizontal sliding units as over lights or side lights – best for arched windows as they can be shaped or curved to a full circle.

Reduction in heating costs

For the four stone openings on the ground floor, three Series 46 fixed lights were transom coupled to a Series 10 horizonal sliding unit. The horizontal slider was fitted in the lower half of the reveal for access to clean the primary windows, with the fixed lights coupled above to follow the tracery of the beautiful original gothic arches.  The community space has now been made more thermally insulated with the addition of secondary glazing and they should start to see a reduction in heating costs, with less heat escaping and the draughts eliminated.

A similar solution was installed in the Church space on the first floor within five wooden reveals. Series 46 fixed lights were transom coupled side by side above a Series 10 horizontal slider in each window opening with a good cavity to reduce noise egress. Events on the ground floor can happen at the same time as church services, without disturbing prayer.

“Aesthetically it all looks excellent, the thermal glazing on the external window does seem to make the community rooms considerably warmer when heated, as we have held small business meetings in them, however the acoustic glazing awaits fully testing its effectiveness as and when COVID restrictions allow.” Peter Smith, Vicar of St Philip’s Church.

Selectaglaze is a specialist designer, manufacturer, and installer of bespoke secondary glazing systems across the UK. Selectaglaze seeks to provide their customers with the best in class product and service to meet all challenges, which is achieved by a process of continual improvements. Selectaglaze has the widest range of secondary glazing units providing a vast range of solutions for projects.

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