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Balcony and terrace canopy in Oberriet

Full project in Oberriet: KSF ground screws, BSH/KVH structure, tafer soffit, balcony build-up on pedestals and custom timber railing.

Location Oberriet (SG), CH
Date 2025-03
Build / material BSH/KVH timber frame on ground screws, terrace roof with timber soffit cladding, balcony build-up: ESB sheathing + bitumen waterproofing, adjustable pedestals, 60x60x2 cm porcelain tiles, timber railing (triple-coated)
Project type Extension to existing building / new construction
Project details

Project details

Initial situation

At an existing home in Oberriet, the brief combined two functions: a weather-protected terrace roof below and a fully usable balcony above. The new structure had to connect precisely to the existing building while being supported at the front on ground screws. For access to the new balcony, part of the existing masonry parapet had to be opened and converted into a passage.

Execution

We started with the ground-screw foundations, then set the front posts and the BSH/KVH structural frame. Next, we built the terrace roof with clean timber soffit cladding and coordinated the drainage details. Above it, we completed the balcony build-up with ESB sheathing and bitumen waterproofing, then laid 60x60x2 cm porcelain tiles on adjustable pedestals. The railing, including the side wind/privacy screen, was designed, fabricated, and installed entirely by our team; all surfaces were finished with a triple coating. Finally, we completed the tie-in to the existing building, including the wall opening and balcony access point.

Result

The result combines terrace roof and balcony in one coherent structure with clean tie-ins to the existing building. Below, the client gained a protected seating area; above, a durable balcony surface with porcelain tiles on adjustable pedestals. Railing, privacy screen, and access zone are executed consistently and ready for daily use.

Complex extension handled by one team

We also take on multi-stage projects that combine foundations, timber structure, terrace roof, balcony build-up, railing/privacy elements, and modifications to existing masonry—from planning to finished delivery.

Before and after

Before and after

Project process

Project Workflow in 6 Steps

From ground screws to the finished balcony with privacy screen.

Step 01

Ground-screw foundations

Ground screws (KSF F 76x1600 R) were installed and extended due to filled soil so they reach load-bearing ground. Axes were set out and the front support line was prepared.

Step 02

BSH/KVH structural frame

Posts and main beams were assembled, tied into the existing building, and aligned as one coherent structure.

Step 03

Terrace roof with timber soffit

The lower level was built as a weather-protected terrace roof with clean timber soffit cladding and drainage details.

Step 04

Balcony deck on pedestals

The upper level was prepared with ESB sheathing and bitumen waterproofing, then finished with 60x60x2 cm porcelain tiles on adjustable pedestals for exact level and slope control.

Step 05

Wall opening and access

The existing balcony parapet/wall was opened to create access to the new balcony, and the reveals and lining were finished cleanly in timber.

Step 06

Railing, privacy side, access

Custom railing was fabricated and finished with a triple coating; wind/privacy screen elements were installed and details were finished cleanly.

Planning a similar project?

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