System catalog

MB-Slimline Aluminum Window System

Steel-window proportions without old steel-window performance. A narrow exterior profile with modern thermal breaks, gaskets and insulated glazing capacity.

MB-Slimline window grid, exterior
Where it fits

Visible or concealed sash, sightline matters as much as performance.

Steel-look window replacements
Historic & industrial renovations
Lofts
Townhouses
Contemporary residences
Narrow-profile fixed glazing
Tilt-and-turn windows
MB-Slimline profile section, exploded
Narrow doesn't mean simple

The visual objective is minimalism; the construction stays engineered.

Thermal separation and a shaped central gasket sit behind the narrow face, while standard Euro-groove geometry keeps hardware selection flexible, the grid, mullion spacing and sash proportions decide whether an elevation reads as deliberate architecture.

Technical specifications

Current ALUPROF system data.

Design pressure
±2880 Pa (±60 psf)
Air infiltration
0.1 L/s/m² (0.02 cfm/ft²)
Water penetration
720 Pa (15 psf)
Thermal performance (Uw)
From 0.8 W/(m²K)
Glazing capability
Up to 81 mm
Sash options
Visible or concealed
Finish & glazing

From restrained black to any architectural color.

Frame finish ranges from charcoal and matte black to other architectural colors and textures, with glass selected for energy, acoustic, safety and solar-control requirements.

See all customization options →

Vitraz fabricates every MB-Slimline configuration around the elevation's actual proportions, mullion spacing, transom placement and hardware, coordinated locally rather than approximated from overseas.

Technical documents

Specify from the source documents.

ALUPROF’s own system leaflets, approvals and test reports for MB Slimline.

System catalog

Send us your steel-look elevation.

Share your drawings or photos and we'll work out whether the proportions can be held exactly with MB-Slimline.

(917) 418-0816
Mon–Fri, 9am–4pm
Brooklyn, NY
Serving NY, NJ, CT, RI & PA