Water can easily find its way into a building through window and door openings if the flashing is damaged or missing. Sill flashing directs water away from the frame so it cannot track into the wall cavity. We repair old flashing, install new systems and check the surrounding areas for signs of moisture. All sill flashing is fitted to current BCP roofing and wall cladding requirements.

Windows and doors are common spots for leaks because they create breaks in the wall surface. If water runs down the cladding and reaches an unprotected sill, it can soak into the wall, rot the frame or cause stains inside the home. Sill flashing creates a barrier that guides water outwards. We check the condition of the opening, look for gaps or movement and make sure the flashing sits in the right position to do its job.
Old flashing can crack, rust or come loose over time. Once it starts lifting, water can sneak underneath and work its way into the wall. We remove the damaged section, inspect the timber or masonry underneath and fit new flashing that sits neatly under the cladding or brickwork. Everything is sealed and secured so water drains away rather than into the structure.
After the job is finished, we check the area with a light water test to make sure the leak is resolved.
If you are renovating or building, sill flashing needs to be installed before the window or door frame goes in. We work with builders and homeowners to set up the flashing correctly so the frame can sit over it without issues. We make sure the angles, overlaps and drainage points are right so the flashing can handle heavy rain. Once it is installed, we double check the cladding or brickwork sits correctly around the frame.
If you have water marks near a window or door, or you are unsure whether the flashing has been installed properly, get in touch with us. Call 03 9498 0458 or email info@heritageplumbinggroup.com.au and we can arrange a site visit.
Frequently Asked Questions
Stains under a window, swelling in the frame or water coming through during heavy rain are common signs.
Yes. We work on brick veneer, weatherboard, metal cladding and other wall types.
Yes. We can install flashing before the frame goes in or replace flashing during renovations.
It often comes from missing or poorly fitted flashing, gaps in the sealant or cladding that has moved.
Yes. It must be installed to meet BCP requirements for moisture control.
It depends on the size of the opening and access. Call our office and we can provide pricing based on your property.






















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Need a reliable plumber near you? Heritage Plumbing Group offers expert solutions across Melbourne with fast response times and top-quality service.
Our licensed team brings decades of local expertise, ensuring efficient, long-lasting results for emergencies, maintenance, and major projects.