Key Takeaways
| Project component | Work completed |
|---|---|
| Timber supports | Sheets lifted; rotten purlins repaired or replaced with SABS-approved Grade 5 SA pine |
| Roof sheeting | Rust treated on retained sheets; badly rusted sheets replaced with galvanised sheets |
| Paint preparation | Entire roof primed before the acrylic coating |
| Water management | Custom back flashings at both chimneys and new gutters |
| Finishing system | Two coats of Excelsior Superior Satin Roof Paint |
Root Causes That Make Corrugated Roof Restoration Necessary
Corrosion, rotten timber and ageing paint made this roof unsuitable for a simple repaint. Water entering around fixings, sheet laps or chimney junctions can repeatedly wet the supports beneath. Decay weakens timber, while corrosion reduces steel thickness. Effective corrugated roof restoration starts by finding these defects and establishing which components remain serviceable.
7:24 Roofing removed the old fixings and lifted sheets to inspect the purlins. This exposed damage that an inspection from above could miss. The same approach supports metal roof repairs and restoration across Sandton. Loose fixings, peeling coatings and damp staining should guide the investigation, rather than determine a coating specification on their own.
Supporting Timber and Sheets During Corrugated Roof Restoration
The team repaired or replaced rotten purlins with the specified Grade 5 SA pine. Sound supports give reinstated sheets secure fixing points. For corrugated roof restoration, the condition of those supports matters as much as the exposed finish. Replacement timber and connections must suit the roof assembly, with structural assessment where damage or movement raises concerns.
Badly rusted sheets were replaced with new galvanised roofing sheets; retained sheets received rust treatment. Selective replacement suits corrugated roof restoration where enough sound material remains. Replacement profiles must match the existing roof, and fixings must suit the sheeting and timber. Sheet removal also needs controlled access and temporary weather protection whenever the building below is exposed.
Douglasdale Roof Restoration Project Photos
Preparing and Priming Metal Before the Finishing Coats
The existing roof carried traces of enamel paint, while the finishing system used an acrylic roof coating. Successful corrugated roof restoration therefore required preparation that addressed both retained paint and exposed metal. 7:24 Roofing primed the entire prepared roof to provide a suitable base for the new coating.
Loose coatings, dirt and unsound corrosion must be removed before painting. Rust converter cannot replace missing steel or strengthen perforated sheets. For corrugated roof restoration, its compatibility with the following primer and topcoats must be checked. Sound enamel also needs cleaning and suitable preparation so the new system can adhere.
New galvanised sheets require surface preparation appropriate to their condition. Excelsior recommends a dedicated galvanised iron primer for its satin acrylic roof coating. Follow the selected products' instructions for cleaning, drying and recoating intervals. Temperature, moisture and approaching rain affect when application can proceed.
7:24 Roofing finished the roof with two coats of Excelsior Superior Satin Roof Paint. In corrugated roof restoration, the primer and finishing coats protect prepared, serviceable metal. They cannot compensate for open junctions, rotten supports or sheets that have rusted through. The wider roofing materials and trade involve distinct decisions about support, water shedding and surface protection.
Chimney Flashings, Drainage and Related Douglasdale Work
7:24 Roofing installed custom-fabricated back flashings at both chimneys and fitted new gutters. Back flashings manage water arriving from the roof above a chimney, while gutters collect runoff at the eaves. This corrugated roof restoration addressed those water paths alongside the timber and sheet repairs.
Effective roof waterproofing and junction repairs depend on details that direct water outwards without obstructing drainage. Inspect flashings, fixings and gutter discharge after severe storms. Early attention to coating damage and local corrosion helps protect the completed corrugated roof restoration. Any repair must suit the affected material and the source of water entry.
Earlier Douglasdale work includes roof maintenance with valley membrane renewal and ridge repairs, shared on 11 August 2026. A separate project shared on 18 July 2026 involved flat roof replacement with a plywood deck and torch-on waterproofing. That flat roof construction used a different system from the metal-sheet coating described here. Further examples appear in the completed roofing projects portfolio.
7:24 Roofing builds client relationships through inspections and repairs that address the cause of failure. The company offers free call-outs and estimations, states a two to three hour response, holds AFRC certification and offers a five year workmanship warranty. Confirm attendance arrangements and the applicable warranty terms when booking.
Frequently Asked Questions
When does corrugated roof restoration require new sheets?
Badly rusted or perforated sheets need replacement. Rust treatment can prepare serviceable metal, but it cannot restore lost thickness. Inspection establishes where replacement is necessary.
Why lift sheets before painting a metal roof?
Lifting sheets exposes concealed timber supports. In Douglasdale, this allowed 7:24 Roofing to repair rotten purlins. Repainting above them would have left weak fixing points unresolved.
Can acrylic roof paint cover old enamel?
A compatible preparation and priming system is essential. Remove loose paint and prepare sound retained coatings. Confirm compatibility with the coating manufacturer before application.
Does corrugated roof restoration change the required roof slope?
Restoration does not remove the sheeting manufacturer's slope requirements. Minimum pitch depends on the selected profile and installation details. A coating cannot correct inadequate falls or replace suitable laps and flashings.
Douglasdale Restoration at a Glance
