Getting it Watertight: 2023 Extension Build Ep.4

The extension roof is complete, and Sam turns his attention to the front of the house.

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Weatherproofing and Tiling the Roof Stage:

Underlayment Installation:

Before the tiles are laid, a protective underlayment (often called roofing felt or tar paper) is spread across the roof’s decking. This acts as an additional moisture barrier, preventing any rainwater that gets past the tiles from penetrating the interior.
Laying Roof Tiles:

Roof tiles are methodically laid starting from the eaves (the roof’s lower edge) and moving upwards to the ridge (the top). They overlap in a way that channels water off the roof, ensuring it doesn’t seep through.

Depending on the design, ridge tiles might cap off the very top of the roof, sealing the junction where the two sides of the roof meet.

Fixing and Securing Tiles:
Tiles can be nailed, clipped, or adhered, depending on the type and regional practices. This ensures they remain in place, resisting wind uplift and other external forces.

Flashing Installation:
Flashing is a thin sheet or strip of water-resistant material, commonly metal, used to prevent water intrusion at areas of the roof like valleys, chimneys, vents, or where the roof meets walls. This is crucial for preventing leaks.

Guttering and Downpipes:
Once the roof is tiled, guttering is affixed to the eaves. Downpipes are also installed to channel rainwater away from the building’s foundation.

Inspection and Quality Assurance:
The roof is inspected to ensure that tiles are properly laid, flashings are well-sealed, and there are no potential leak points. It’s essential to confirm that the roof is fully waterproofed.

Interior Protection:
With the roof effectively tiled and sealed, the extension’s interior is now shielded from the elements. This means that internal work can commence, such as insulation installation, drywall, electrical, and plumbing, without the risk of rainwater damage.

This stage is pivotal because construction can progress without significant weather-related interruptions once the extension is shielded from rain. Properly executed, it ensures the longevity and comfort of the extended space.

About Dylan Garton

Dylan Garton is a co-founder, video producer and editor for the Skill Builder social media platforms.

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