
The W20 slimline steel system brings a modern edge to the iconic design of the early 20th century. Designed for internal doors and partitions, it offers visual continuity between interior and exterior architecture. Hot-rolled profiles deliver strength and authenticity, while minimal sight-lines preserve openness and proportion. With vent heights up to 2.5 m and a complete palette of finishes — from the industrial character of natural steel to refined RAL coatings — W20 offers architects creative freedom without compromise. The result is a system that combines heritage appeal with enduring design versatility.
Completely customisable
Single, double, pocket and sliding doors
Up to 2.5m vent height
Large vent sizes allow for total design freedom
RAL finishes
Powder-coated finishes in any RAL colour
Sound insulation
Prevent sounds travelling from room to room
300Pa air permeability
Certified 4 Class to meet EN 12207
Water tightness
Certified 9A Class to meet EN 12208
Ironmongery
Wide selection of handles and accessories



































With a construction depth of 44 mm, the face width of the leaf and frame is just 55 mm, adding up to 44 mm in the face plate
44 mm
profile depth
55 mm
leaf & frame
55 mm
face plate
Element sizes of up to 1050 mm width x 2500 mm height per leaf (max. 120 kg leaf weight)
105 cm
leaf width
250 cm
leaf height
120 kg
leaf weight

Coated steel strikes the perfect balance between function and style. From classic RAL colours to bold textures, coated steel blends strength with outstanding visual and mechanical performance.

Hot-rolled steel profiles feature a consistent texture, making them ideal for various finishes. Brushing or blackening offers an alternative to traditional painting, offering a high degree of customisation.

G1 1312Q — Aluminium

G1 1312S — Aluminium

G1 1313G — Steel

G1 0813F — Aluminium

310 Welded / screw-on hinge

2100 Slimline butt hinge (100mm)

3100 Projection slimline butt hinge

1260 Slimline butt hinge (85mm)

2050 Slimline butt hinge (50mm)

202 Large bullet lift-off hinge
Starting a project is quick and easy. Simply tell us about your project and share drawings and we'll reply within 24hrs
Visit our client resources section to view and download the most up-to-date range of Perla product brochures
lukasz@perlawindows.com
+44 0 203 950 1451
Lukasz supports the wider team across planning, scheduling, and coordination—keeping operations running behind the scenes. His flexibility allows him to step in wherever needed, helping to maintain momentum across projects.
Drawing on experience in warehousing, hospitality, and admin support, Lukasz understands how to manage competing demands while keeping client needs front and centre. His organised, proactive approach ensures nothing is overlooked.

Kate looks after the company finances and ensures that office and business operations run smoothly. Her responsibilities are wide-ranging and include human resources, compliance and insurance, solving any problems that arise, and ensuring that all Perla projects are progressed efficiently.
A natural multitasker, Kate has the ability to switch from role to role without breaking a sweat. She takes care of all the moving parts to keep the office running like clockwork.

seb@perlawindows.com
+44 0 203 906 1777
Perla co-founder and Technical Director, Sebastian, oversees the planning and specification phases of the production process. He also acts as the main point of contact for clients prior to manufacturing and installation.
Sebastian’s extensive knowledge of design and production stems from a life-long interest in manufacturing and engineering. Starting out as a plumber and electrician alongside his father in the family business, Sebastian went on to establish a partnership with Nick and Dan’s building company. Together, they completed more than 100 projects and built a reputation for uncompromising quality.

karol@perlawindows.com
+44 0203 906 1775
Karol oversees day-to-day project delivery, ensuring each stage runs smoothly and efficiently. He works closely with both internal teams and clients to keep timelines on track and expectations aligned.
With a BA in Business Management and a background in logistics and operations, Karol brings sharp attention to detail and strong technical knowledge to every project. His process-driven approach helps prevent issues before they arise, creating a more streamlined experience for clients.

nick@perlawindows.com
+44 0 203 906 1776
Nick co-founded Perla to provide unparalleled standards for service, value, and quality in the windows industry. Drawing on his past experience in marketing, at technology giant Intel, Nick’s primary focus is on the bigger picture. With astute awareness of market trends and an inherent understanding of customer needs, Nick implements positive change so that Perla can continue to be at the forefront of an ever-evolving market.
Prior to establishing Perla in 2015, good friends Nick and Dan ran a London-based boutique building company focused on high-end renovations and interiors projects.

dan@perlawindows.com
+44 0 203 906 1776
Prior to co-founding Perla, Dan spent 10 years as a Partner at the prestigious renovations company he established with Nick in 2005. With a sharp eye for detail and a meticulous approach to planning, Dan’s account management approach draws on more than 25 years’ experience in the building industry.
Having overseen a huge variety of residential and commercial projects, Dan knows how to resolve issues long before they become problems. His broad experience in building processes ensures every project runs on-time, on-budget and according to the business’ ethos of providing incredible service and impeccable quality.
