Cwt Y Bugail Slate and Lead
Perth City

COMO Treasury Building

Cwt Y Bugail slate and lead roofing installed across the COMO Treasury Building, restoring one of Perth's most recognised heritage landmarks to its original character.

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Frequently Asked Questions

Can you match existing slate or tiles?

In many cases, yes. Matching depends on the original material and availability.

We consider:

  • size and thickness
  • colour and texture
  • installation pattern
  • fixing method and detailing

Where an exact match is not possible, we recommend the closest suitable alternative. For material guidance, refer to Products.

How long does a slate roof last?

A natural slate roof can last 75 years or more when installed correctly.
Lifespan depends on:

  • slate grade and thickness
  • correct fixing and detailing
  • periodic inspections of flashings and valleys

Slate is often chosen because it can be a long-term, generational roof system.

Can you repair a slate roof, or does it always need replacing?

Slate roofs can often be repaired if the overall system is still sound.

Repairs are common where there is:

  • localised damage
  • slipped or broken slate
  • aged flashings causing leaks
  • isolated fixing failures

If widespread failure is present, a full replacement may be the more reliable solution. We assess this during inspection.

Does slate roofing need much maintenance?

Slate itself needs very little maintenance. Most attention is on the components around it:

  • flashings and valleys
  • ridges and junctions
  • occasional replacement of a cracked or slipped slate

A simple inspection schedule helps keep everything performing as intended.

Is slate too heavy for my roof structure?

Slate is heavier than metal roofing. If your home was built for tiles or slate, it is often suitable.

If you are changing from a lighter roof type, we will check structure and loading requirements before proceeding.

What is leadwork, and why is it used on heritage roofs?

Leadwork refers to traditional sheet lead detailing used for waterproofing and finishing.

It is commonly used in:

  • flashings at walls and chimneys
  • valleys and junctions
  • roof penetrations
  • complex transitions and custom details

Lead is highly durable and well suited to long-life heritage roofing when installed correctly.

Where is lead used in roofing?

Lead is typically used for:

  • flashings (chimneys, walls, parapets)
  • valleys and junctions
  • heritage detailing where traditional methods are required

It is chosen because it forms to complex shapes reliably.

Is lead safe on a roof?

Lead is safe when used correctly in roofing applications. The key is:

  • professional handling during installation
  • correct detailing and fixing
  • responsible collection and recycling of offcuts

We follow safe work practices when working with lead.

How long does lead flashing last?

Lead is one of the longest-lasting roofing materials when installed correctly. It is often specified for heritage work because it can perform for decades with minimal intervention.

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