Solar Panels on Every Cardiff Roof Type — The Complete 2025 Guide

The most common roof type in Cardiff. Standard interlocking tile hooks slot under tiles and fix to roof rafters. Stainless steel fixings resist South Wales coastal weather. No tiles removed, no drilling required. A typical 4kW system on a concrete tile roof generates 3,400–3,800 kWh per year.

Cardiff's iconic Welsh slate roofs require specialist slate hooks — not standard tile hooks. These hook-type fittings grip beneath each slate and anchor to the battens without drilling or removing any slates. Our team has extensive Cardiff slate roof experience. The steep pitches (40–50°) of Victorian slate roofs actually optimise winter solar generation.

Flat roofs are actually excellent for solar — and often better than pitched roofs because you can choose the optimal tilt angle. We use ballasted systems (weighted frames, no penetrations) or mechanically fixed systems with angled frames set at 15–30 degrees for South Wales. Perfect for rear extensions, garages and commercial buildings across Cardiff.

Metal roofs — standing seam, trapezoidal and corrugated profiles — are actually ideal for solar because the mounting systems clamp to the metal profile without any penetrations. Standing seam clamps grip the raised seams directly. No drilling, no sealant, no weatherproofing risk. Common on Cardiff commercial and agricultural buildings.

In-roof systems replace the roof tiles with purpose-designed solar panels, creating a flush, modern finish. Popular on new builds in Pontprennau and St Mellons, and on extensions where a clean aesthetic is important. Slightly more expensive than standard on-roof but increasingly common and very popular with Cardiff homeowners who want a discreet installation.

Roofs with pitches below 15 degrees need special consideration. Very low-pitch panels don't self-clean as efficiently and may need more frequent cleaning. We can install angled mounting frames to raise the panel tilt for better generation. Common on bungalows across Heath, Llanedeyrn and parts of Llanishen.