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The iSteel SLIM Internal glazed steel door and screen system was developed to offer an innovative alternative to the widely used W20 profile.

iSteel’s SLIM profile has a similar overall aesthetic at first glance but upon closer inspection is a more refined, sharp and contemporary product for a discerning clientele that are looking for an elegant modern day classic.

The beauty of an iSteel product is it’s versatility! Depending on your design requirements, SLIM can be styled to appear minimalistic, art deco, Georgian, industrial and historical.

Our projects range from city centre appartments to stately homes, country cottages, restraunts, offices and more – which speaks volume for the quality of our product, the talents of our designers and
artisan fabricators.



iSteel SLIM

iSteel’s SLIM steel glazing system was intentionally developed to address what we feel are W20 design compromises. Our outer frame measures 20mm and cross bar details 15mm which creates a light and elegant look, beautifully framing the glass without overpowering it.

SLIM is intentionally contemporary, engineered to appear light, crisp and clean – not intended to be a direct comparison to W20, iSteel is a modern looking Steel and Glazing alternative where there is a lack of it.

Not only does SLIM look incredible but the build quality, materials used and customer service that is associated with it are second to none.




Traditionally internal steel framed glazing has used a W20 system
with the slimmest option available having an overall outer frame depth of 43mm utilising a ‘T’ shaped profile. Another characteristic
of W20 is the cross bar detail which is almost 30mm and can become overtly domineering, detracting from the lightness of the glass.

W20 has its place in the market and is suitable for ‘purists’ and
those wishing to achieve an historical look, but when compared
to iSteel SLIM has larger sightlines and a complicated construction, ultimately compromising the aesthetic.


iSteel design, fabricate and install hand crafted screens and doors to custom specifications. Glass options include clear, reeded and frosted. Handle choice range from traditional to contemporary and colour options are endless.

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Domestic, London iSteel doors are a true timeless classic, look impressive and last a lifetime! Finchley, London based client was looking for a way to divide the sitting and TV room without loosing light and open plan feel. A central full height sliding door with side...

Domestic, Surrey

Domestic, Surrey Want timeless design? Master craftmanship? Precision installation? Look no further than iSteel, the UK’s number one choice for glazed steel internal and fire rated doors. Unlike other companies, All our products are designed, surveyed, fabricated and...

Domestic, Notton

Domestic, Notton Fantastic Fire Rated Doors Luxury Home builders Whitshaw Builders, have recently completed an impressive development in Notton Wakefield and chose iSteel to design, fabricate and install bespoke glazed steel Fire Rated French doors from hall to...

Domestic, Northallerton

Domestic, Northallerton Exposed Brick, Beautiful Stone and Steel doors. What more could a Barn Conversion ask for? A lot of thought had gone into the look and feel of the space to maintain character. Our glazed steel French doors are the perfect accompaniment witch...

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Feel free to give us a call if you would like to discuss our products in detail on 0330 1331 069.