Roofline Care: Soffits, Fascias and Bargeboards

What are soffits, fascias and bargeboards?

The fascia is the board running horizontally along the edge of the roof, typically where the gutter is fixed, while the soffit is the panel underneath it, closing the gap between the fascia and the wall and usually including ventilation for the roof space. Bargeboards are the sloped boards found at the gable end of a roof, following the pitch line rather than running horizontally.

Most UK homes built or renovated since the 1980s have uPVC roofline, which is low maintenance but does still discolour over time, particularly from algae growth, general grime and UV exposure. Older properties may still have original timber roofline, which needs different care, including painting or staining rather than the wipe-clean approach uPVC allows.

Cleaning uPVC soffits and fascias

Grey, streaky uPVC roofline is usually a combination of algae growth and general atmospheric grime rather than permanent discolouration, and it responds well to a soft wash treatment similar to render, using a gentle cleaning solution followed by a low-pressure rinse. This is often done from the ground using the same reach pole equipment as gutter clearing, making it efficient to combine with a gutter clean on the same visit.

Stubborn black streaking, often running down from behind the gutter where it's been overflowing, can need a slightly more targeted approach, sometimes combined with a proper gutter clear to stop the streaking recurring, since the cause is often ongoing overflow rather than just surface dirt.

Restoration versus replacement

For uPVC roofline that's discoloured but structurally sound, a thorough clean, sometimes combined with a specific uPVC restoration product that revives the surface finish, is usually enough to bring it back to a good appearance without the cost and disruption of full replacement. This is worth trying first on roofline that's otherwise in good condition.

Replacement becomes the sensible option where the roofline is cracked, warped, sagging due to water damage behind it, or where timber roofline has rotted beyond what a repaint or repair can fix. A cleaning visit is often a useful moment to spot this early, since problems hidden under years of grime can become visible once the surface is properly cleaned.

What roofline cleaning typically costs

Soffit and fascia cleaning for a standard semi-detached house typically runs from around £80 to £180 depending on length and access, often discounted when combined with a gutter clean on the same visit. uPVC restoration treatment for particularly discoloured or oxidised roofline is usually priced as an add-on, reflecting the extra product and application time involved.