Garden Route · Knysna · Coastal Systems
Flat Roof & Slab Waterproofing in Knysna
Flat roofs and concrete slabs fail quietly — a hairline crack, a season of ponding water, and suddenly the ceiling below carries the evidence. SealPro manufactures the ArmTec HyperFlex reinforced waterproofing system for exactly these roofs, installed to specification by our approved local applicator. Knysna’s estate and lagoon-side homes — Pezula, Simola, Thesen Islands — live in constant salt air and winter rain.
- Manufacturer-direct systems
- Approved applicator network
- Free on-site inspections
- SealPro plant: Garden Route
Why Knysna flat roofs and slabs leak
Knysna’s estate and lagoon-side homes — Pezula, Simola, Thesen Islands — live in constant salt air and winter rain. Timber-and-tin architecture, premium finishes and marine exposure demand coastal-specified coating systems, not hardware-store paint. Concrete moves. Day-night temperature swings open hairline cracks, ponding water finds every one of them, parapet junctions separate, and old torch-on dries out and lifts at the laps. Patch products fail because they cannot move with the slab. Across Knysna, Pezula, Simola, Thesen Islands, Belvidere and Brenton, the slabs that stay dry are the ones sealed as a continuous reinforced system.
The ArmTec HyperFlex slab system — step by step
Every product below is manufactured by SealPro Coatings and applied at factory-specified coverage rates — the same system, every roof.
- Inspection & moisture checkThe slab, falls, outlets and parapets assessed; trapped moisture and failed screed identified before any product goes down — overlaying a wet slab is wasted money.
- Repair & preparationCracks repaired, falls corrected where needed, and the surface primed with UltraBond WP so the membrane bonds to the slab, not to dust.
- ArmTec HyperFlex + mesh reinforcementThe ArmTec HyperFlex membrane applied with full ArmTec fibreglass mesh reinforcement — across the field of the roof, up parapets and into outlets, as one continuous seal.
- UV-stable topcoat / torch-on renewalFinished with UV-stable coats — and where an old torch-on exists, the torch-on alternative system renews it without stripping the roof open.
Installed by our approved applicator — managed from head office
Your roof is assessed and restored by an approved SealPro applicator for the Knysna area, coordinated by our national support team. Every enquiry comes to SealPro head office first — we assign it, schedule the inspection and make sure it is followed up. One number, full accountability.
Other SealPro services in Knysna
Tile Roof Painting & Maintenance
RidgeSeal ridge waterproofing, Penetrar primer and UV-stable Renew topcoats for cement tile roofs.
Metal Roof Rust Treatment & Painting
Referro rust conversion, sealed fasteners and SteelPro or Cool Roof finishes for IBR and corrugated roofs.
Roof Ridge Maintenance & Waterproofing
The RidgeSeal membrane system for cracked ridge capping — filled, reinforced, sealed and colour-matched.
Exterior House & Commercial Painting
BondPro primer, PlasTex textured coatings and Weather & Wall finishes for homes, complexes and commercial buildings.
All Knysna Services
Every SealPro waterproofing and painting service available in the Knysna area.
Flat Roof & Slab Waterproofing across the region
We regularly work across Knysna, Pezula, Simola, Thesen Islands, Belvidere and Brenton — backed by the SealPro Garden Route mixing plant. Wherever you are, the inspection is free: call 060 997 6364 or email leads@sealprocoatings.co.za.
Knysna flat roof FAQs
Can you renew my old torch-on without ripping it off?
In most cases yes — if the membrane is still bonded, the ArmTec torch-on alternative system overlays and reinforces it. Quicker, cleaner, and the building stays sealed throughout.
The balcony above our living room leaks. Same system?
Yes — balconies and patio slabs get the same reinforced treatment, tied into door thresholds and railing posts, the two places patch jobs always miss.
Do you work on Thesen Islands and the estates?
Yes — estate procedures, approved palettes and marine-grade systems are exactly what our Garden Route teams are set up for.
Get your Knysna roof assessed — free
Send a photo or book a free on-site inspection. You’ll get an honest answer on whether your roof needs a repair, a full system, or nothing yet — and a clear quote from our approved applicator, followed up from head office.
Call 060 997 6364Request a quote
SealPro Coatings · R98 Seekoeihoek Road, Magaliesburg · leads@sealprocoatings.co.za · Mon–Fri 08:00–17:00