External Waterproofing on the Central Coast

Rain, runoff and UV exposure can do serious damage when external areas aren’t properly sealed. Coastwide Waterproofing provides external waterproofing for rooftops, balconies, decks and retaining walls across the Central Coast and beyond, including Hornsby and Narrabeen.

We apply sheet and liquid membranes designed to resist cracking, peeling and water ingress over time. Our team assesses your site, checks drainage and selects products that match the surface type and exposure level. Whether it’s a newly built area or a remedial job, we install durable solutions that help prevent leaks before they start.

For long-lasting external waterproofing backed by expert application, call our team on 02 4306 3524.

External areas demand more from a waterproofing system—and not every membrane can handle the pressure. We use durable products that withstand weather extremes, surface movement and foot traffic.

Our team applies each layer with care, making sure edges, joins and penetrations are properly sealed. From flat rooftops to exposed balconies and feature walls, we help protect structures from slow leaks and water damage.

Builders and property managers trust us to deliver on-site without holding up progress or compromising on quality. We also take the time to communicate clearly, so you know what’s happening at every stage. When the job calls for outdoor performance, we get it done properly.