Steel Doors & Windows

Strength That Lasts a Lifetime

Why Choose Steel Doors & Windows

Six reasons steel outperforms wood, aluminum, and PVC

Ultra-High Structural Strength
01

Ultra-High Structural Strength

Load-bearing capacity: 235–345 MPa

Our steel profiles deliver exceptional rigidity and impact resistance, enabling large-span windows and doors without deformation. Ideal for high-wind zones, coastal villas, and commercial facades.

Extreme Longevity
02

Extreme Longevity

Service life exceeding 50 years

No rotting, warping, or termite damage. Steel naturally stands against time and weather. With proper surface finishing, our windows and doors keep their performance and appearance for decades — far outlasting wood or aluminum.

Superior Fire Resistance
03

Superior Fire Resistance

Melting point of steel: ~1538°C — non-combustible

Unlike wood or PVC, steel does not feed fire. Our steel frames provide critical evacuation time and comply with strict building fire codes across North America, Europe, and Australia.

Optimized Thermal Performance
04

Optimized Thermal Performance

Thermal-break U-value: 2.0–2.5 W/(m²·K)

Two options for every climate. Non-thermal-break steel (~45–55 W/m·K) is a cost-effective choice for mild regions. Thermal-break steel inserts an insulating barrier between profiles to dramatically cut heat loss — essential for passive houses and cold climates. Both fully customizable.

Slim & Minimalist Frames
05

Slim & Minimalist Frames

Visible sightline: only 40–60 mm

Steel’s high strength allows slender profiles other materials cannot achieve. The result is a sleek, modern aesthetic with more natural light and unobstructed views — highly valued in luxury residential and designer-led projects.

100% Recyclable & Green
06

100% Recyclable & Green

Infinitely recyclable with no loss of performance

Choose sustainable construction. Our steel profiles use a high percentage of recycled content and can be fully recycled at end of life — contributing to LEED, BREEAM, and other green building certifications.

What Our Clients Say

Real reviews from homeowners, builders, and architects worldwide

★★★★★

“I wasn't sure about importing steel windows from overseas, but the quality blew me away. Every weld is smooth — you can't even see the joints. The slim frames make my beach house look so elegant, and the packaging was rock solid.”

Liam

🇦🇺 Sydney, Australia

★★★★★

“These steel casement windows nailed the industrial-modern look. The welds are so clean you can't feel any bump. The thermal break really works — you feel the temperature difference in winter — and the slim sightline makes the space feel larger.”

Sophia

🇺🇸 New York, USA

★★★★★

“Winter here gets very cold, but there's no condensation or cold drafts around these windows. The thermal-break doors are extremely airtight and the workmanship is perfect. First time buying from China and everything went smoothly.”

Natalie

🇨🇦 Whistler, Canada

★★★★★

“These windows survived the hurricane — they really gave me peace of mind. The frames are strong but the sightline is still slim, very modern from inside. Delivery was faster than expected with no damage.”

Mike

🇺🇸 Miami, USA

★★★★★

“Their customization capability is amazing — they turned my rough sketches into reality, even curved windows I thought were impossible. The welding is invisible and the dark bronze finish looks incredible against the lake view.”

Oliver

🇳🇿 Queenstown, New Zealand

★★★★★

“We chose Permalsteel for all exterior doors and windows of our boutique hotel. The antique bronze finish matches our character perfectly, and two years later they still look brand new despite the salty sea air. Worth every euro.”

Camille

🇫🇷 Nice, France

★★★★★

“These windows are perfect. The frames are slim and we get so much natural light. They don't look bulky but still feel super solid, and the hardware feels premium. The whole process was stress-free.”

Chloe

🇦🇺 Melbourne, Australia

★★★★★

“I was worried about rust since my house is close to the ocean. After more than a year, still perfect. The sliding and folding doors open smoothly and the finish is flawless. Their service team replied faster than any local supplier.”

James

🇦🇺 Perth, Australia

★★★★★

“I specified Permalsteel for a modern lake house project. The clients wanted ultra-slim frames and maximum glass — delivered exactly that. The thermal-break option was essential for our climate. Highly recommend for architects.”

Jennifer

🇺🇸 Seattle, USA

★★★★★

“We renovated our old suburban house and wanted black steel windows everywhere. Every size was custom-made for a perfect fit. Packaging was very sturdy and the finish was immaculate. The whole house looks so much more upscale now.”

Ryan

🇺🇸 Napa Valley, USA

★★★★★

“I run a small building company specializing in luxury homes. I've used three different steel window suppliers over the years — Permalsteel is by far the best. Their attention to detail is impressive. Great partner.”

Peter

🇦🇺 Adelaide, Australia

★★★★★

“I wanted the classic French steel window look with modern performance, and they nailed it. The antique bronze finish is stunning, and the solid hot-rolled profiles are just as slim as the original 100-year-old windows. The whole house feels more elegant now.”

Juliette

🇫🇷 Provence, France

★★★★★

“I love the authentic feel of old-style steel windows, and these look so classic. They sent photos and videos before shipping — incredibly transparent. Heritage charm with modern airtightness: no drafts, no condensation. My neighbours have already asked who made them.”

Henry

🇬🇧 London, United Kingdom

★★★★★

“As a designer at a construction firm, I found Permalsteel while looking for a reliable supplier. Their products are beautiful and high quality, and whenever we hit an issue during installation they helped us solve it quickly. Already on my long-term vendor list.”

Michael

🇺🇸 Denver, USA

★★★★★

“We're extremely satisfied with the curved doors we bought from Permalsteel. The lines are smooth and elegant, the quality is excellent, the price is competitive, and the service is outstanding. I strongly recommend them to any builder looking for custom steel.”

Sarah

🇦🇺 Brisbane, Australia

★★★★★

“Great windows and doors — strong frames, perfect details, and easy to install. My crew appreciated how well everything was packaged and labeled, which made the job much smoother. So far everything has been excellent.”

David

🇨🇦 Toronto, Canada

★★★★★

“I'm an architect, and this was my first time working with Permalsteel. Lydia was enthusiastic, knew every product, and responded quickly with custom solutions. The whole collaboration was smooth and enjoyable — both my client and I were thrilled after installation.”

Pierre

🇫🇷 Lyon, France

★★★★★

“I'm extremely satisfied with the doors I bought from Permalsteel. They're well-made and very solid, and the slim, elegant frames instantly elevated the look of our home. Every visitor comments on them.”

Emily

🇺🇸 Austin, USA

★★★★★

“I've worked with Permalsteel twice now, and both experiences were great. The manufacturing and shipping take time, but the wait is worth it. Quality is outstanding, everything is made exactly to spec, and dimensions are precise — no surprises on site.”

Matt

🇳🇿 Auckland, New Zealand

★★★★★

“This is my third order from Permalsteel. The first two were for clients who were extremely happy, so this time I renovated my own office with their doors and windows. These doors are stunning — I love how they look. Highly recommend.”

James

🇬🇧 Manchester, UK

★★★★★

“As an interior designer, I specify products that look great and perform well — Permalsteel delivered on both. The thermal-break windows keep my client's home warm through Vancouver's wet winters, and the slim profiles look gorgeous. Professional from quote to delivery.”

Lisa

🇨🇦 Vancouver, Canada

Get a Free Quote for Your Project

Send us your specifications or drawings today. Our engineering team responds within 48 hours with a detailed quotation — custom sizes, finishes, and thermal options available.