Touchstone Glazing / Products & Services
Steelyte® Opening Casements
Our Steelyte® opening casements are designed and manufactured in our yorkshire workshop.
They offer the narrowest of sight-lines and due to the fact they are made from high-grade stainless steel which is all but immune to corrosion they are ideal for coastal properties. Fitting directly into stone mullions, our double glazed steel opening windows are ideal for listed buildings and heritage sites.
STEELYTE® I - STEELYTE SLIM® - STEELYTE® II
Key Features
Outstanding thermal insulation with BRFC “A++” classification.
Fully drained profile featuring three thermal breaks and two weather resistant seals.
Superior strength and longevity with 304 grade “18/32” stainless steel construction, laser cut from one piece of steel so no mitre joints.
Takes a 24mm unit.
High performance powder coating and available in a range of RAL colours.
Warm edge spacer technology.
Can easily accommodate specialised glass for Security, UV filtration, Energy conservation and Sound inhibition.
Narrow sightlines (approx. 35mm), that complement heritage and conservation buildings.
Our glazing units can be removed for repair on-site using hand tools.
Innovation Built On Tradition
Our Steelyte® opening casements come with 24mm units as standard and are manufactured using grade 304 “18/8” stainless steel, which generally exceeds British Standard 6510 and is all but immune to corrosion. It is particularly good for use in coastal properties and those that are situated in exposed areas. Incorporating three thermal breaks and two weather seals it has achieved an “A++” rating for thermal efficiency. Our frames are polyester powder coat paint finish to EN ISO BS:6497, or BS EN 13438, or can be supplied polished for modern building applications. We offer a varied choice and range including top and side hung opening casements. Shapes can also be accommodated.
Our windows are normally supplied to open outwards, but due to our own in house design department bespoke options can be offered. All our double glazed opening casements incorporate a unique PVC edging to protect historic stonework. We offer a stainless steel fixed frame window with the narrowest if sightlines. Our opening casements can be double or triple glazed using high performance 24mm insulating glass units. This specification combines the latest glazing technology with warm edge spacer bar and Argon gas filling; this achieves a superior performance that most double glazed units. All of our windows are toughened and factory glazed. However, the design nature of our Steelyte opening casements mean that our glazing units can be removed for repair on site using hand tools.
For more information, please get in contact.
“When looking to replace the original single glazed panels with double glazed units in our Grade 2 listed property we knew we could have a fight on our hands with our local planning dept. Thankfully our research had lead us to Touchstone, who it turned out, was a name our local planning dept were already aware of. Having Touchstone on our Listed Building Consent application was undoubtedly a factor in gaining LBC approval without a single hitch. We jumped through more hoops to replace a new front door than we did to reglaze the entire house!
From initial enquiry to installation the Touchstone team provided a fantastic level of service at every step of the way. From order to install took 6 months but the wait was definitely worth it. Our new Touchstone windows look fabulous and are a fabulous addition to a lovely old house”
— Baldwin - The Lodge
Let’s Start your project
Whether it’s planning, design, or installation, we guide every step of your historic glazing project, let’s start the conversation.

