Sandton Office Block

A clean roof edge for a Sandton commercial building

The brief came from a commercial property team in Sandton looking for a tidy roof edge on an office block with a very straight, modern profile. The existing roofline had mixed components and patch repairs, so the aim was to replace the visible edge treatment with matching fascia boards, straight gutter runs and rectangular downpipes that would sit neatly against the building face.

For a site like this, appearance matters, but so does water control. Sandton can see hard summer storms, and when gutters are undersized or poorly aligned the overflow ends up staining walls and tracking into paving joints. The building needed a practical system that would move water off the roof fast, stay straight over long runs and hold its shape over time.

What the site needed before work could begin

The roof had a few features that shaped the approach. There were long elevations with visible edges from the street, a mix of roof heights, and access points that had to stay clear for tenants and maintenance staff. Work at height had to be planned carefully, and only competent people should handle roofing and gutter work where fall protection and edge safety are part of the job.

We also had to account for existing outlets and wall sections that could not be altered much. That meant careful measuring, checking the roof slope and setting the gutter falls so water would move to the downpipes without ponding. On commercial work, small errors show up quickly, especially where long straight lines meet corners, joins and expansion points.

• Measured the roof edges and outlet positions before supply
• Checked the fall direction on each run so water would move properly
• Worked around tenant access and existing wall finishes
• Matched visible fascia lines to the building’s straight modern look

Materials chosen for the roof edge package

The supply package included plastic-steel composite fascia boards, matching gutters and rectangular downpipes sized for commercial roof areas. The composite material gives a neat appearance with good rigidity, and it holds its line better than lighter trim materials when the spans are long. For this type of building, a straight face and crisp corner detail make a real difference to the overall finish.

We supplied gutter lengths, corners, stop ends, brackets, joints and outlet pieces, together with downpipes and brackets set out for the wall faces. Bracket spacing was set to support the load of water during heavy rain, with enough fixing points to keep long runs firm. Where the roofline changed level, the components were cut and aligned so the joints stayed tidy and the water path remained continuous.

• Straight fascia boards for the visible roof edge
• Rectangular gutters sized for commercial rainwater flow
• Rectangular downpipes for a neat modern look
• Brackets, outlets, corners and jointing pieces

Installing the system without disturbing the building

The installation was planned to keep disruption low for the occupants. The team removed the old edge components in sections, then fitted the new fascia and gutter runs in sequence so the roof edge was never left open for longer than needed. Care was taken on seals, corners and outlet connections, because a neat outside finish still has to perform under real rain conditions.

The downpipes were placed to suit the building faces and drainage points, with fixings set square so the runs stayed straight down the wall. The result was a much cleaner line from roof to ground, and less visual clutter around the upper storey. The straight-lined fascia boards gave the roof edge a sharper edge and tied in well with the office block’s modern cladding details.

• Old components removed in manageable sections
• New fascia and gutter runs installed with aligned brackets
• Downpipes fixed square to the wall for a clean finish
• Connections sealed and checked along the full run

Timing, coordination and handover

The work ran over two weeks from final measuring through to installation and handover. The first stage covered site checks, material takeoff and fabrication planning. The second stage covered supply, installation and final checks for alignment, drainage and visible finish. On a commercial site, that pace gives enough time to work carefully without dragging the programme out.

At handover, the roof edge was neat and uniform, with the gutters aligned to the falls and the downpipes sitting cleanly against the walls. The property team wanted a finished look that did not draw attention to itself, and that is exactly what this system gave them. It reads as part of the building now, not as an afterthought.

• Week 1: measuring, takeoff and supply planning
• Week 2: installation, sealing and final alignment checks
• Final handover: drainage path, fixings and appearance reviewed

Keeping the roofline in good order

For office blocks, maintenance is mostly about keeping outlets, gutters and brackets clear of leaves, dust and wind-blown debris. In Sandton, trees and rooftop dirt can build up after a few storms, so regular inspections are worth doing. A quick check after heavy rain helps spot standing water, loose fixings or a blocked downpipe before it turns into a leak mark on the wall below.

Plastic-steel composite fascia and gutter materials are easy to keep neat with simple cleaning and inspection. The key is not to wait until overflow becomes visible. If a section starts to sag, or water is missing the outlet, it usually points to a fall issue, blockage or fixing problem that should be corrected early. That saves time and keeps the building looking sharp.

• Check gutters after heavy rain for standing water
• Clear leaves and debris from outlets and corners
• Look for loose brackets or sagging sections
• Wash down visible fascia to keep the finish tidy