Integrating solar PV with your roof in Arundel
Adding solar PV is a smart move for many homes in Arundel, but the success of the system depends on getting the roofing details right. This guide covers timing, fixing methods and flashing so your investment performs well and stays watertight. If you are planning a project and want local expertise, speak to Roofing Arundel.
Timing your PV and roofing work
New roofs and re-roofs
The most efficient time to install PV is during a new roof or re-roof. Scaffolding, access and roof coverings are already organised, which cuts disruption and cost. Brackets can be positioned directly to rafters, underlay can be detailed neatly around fixings and cable routes can be planned before tiles or slates go on. It also helps align warranties across the roof covering and the PV mounting hardware.
Retrofitting PV
For existing roofs, a pre-install survey is essential. We check tile or slate condition, batten sizing, rafter spacing and any signs of movement. We also assess wind exposure, which matters in Arundel given open aspects near the South Downs and coastal gusts. Arrays should be set back from eaves, verges and ridges to reduce uplift, and weak or weathered coverings should be repaired before the array goes on.
Fixing methods that protect your roof
Pitched tiled roofs
On concrete or clay tiles, stainless steel roof hooks or brackets are fixed to rafters. Tiles are then re-fitted with precise grinding or spacer feet to avoid point loading or rocking. Brackets should be aligned to the rail manufacturer’s layout and positioned to keep drainage pathways clear. Use matching replacement tiles where cuts are needed and ensure the underlay is sealed around penetrations.
Natural slate roofs
Slates are more fragile, so care is key. We use slim brackets with soakers or proprietary slate flashing plates that sit under the surrounding courses. Often this includes a small area of controlled slate removal, replacement with pre-cut slates and the addition of counter battens to keep the array level without pinching the slates. Copper or stainless fixings are preferred to avoid staining and corrosion.
Flat roofs
Flat roof arrays use ballasted frames or mechanical fixings. On single-ply membranes, purpose-made post boots or welded sleeves maintain waterproofing. On built-up felt or liquid systems, we create raised plinths or use liquid-applied flashing around posts. Avoid uncontrolled ballast loads on older decks. Always check the deck structure and maintain clear water flow to outlets.
Flashing and weatherproofing details
Bracket and rail interfaces
Each bracket penetration needs a weathering layer that matches the roof covering. On tiles this can be a formed lead or lead-free flashing piece that interlocks with the course above. On slates, use flat flashings or soakers that tuck neatly into the lap. Do not block water channels and never rely on mastic alone.
Cable entries and penetrations
Use dedicated cable glands with UV-stable grommets and a flashing slate or tile to suit. Lead or lead-free options both work, but choose materials compatible with your roof and local environment. In Arundel’s maritime air, non-staining lead alternatives can be a good choice. Route cables away from valleys, keep them clipped and protected, and leave a gentle drip loop beneath the entry to prevent water tracking.
Abutments, chimneys and valleys
Where arrays sit near walls or chimneys, maintain minimum clearances and leave existing flashings accessible for inspection. Never span across valleys or box gutters. Water must flow unimpeded and debris should not collect behind rails. If arrays are close to ridges, ensure ridge ventilation remains open and weatherproof.
Local planning and heritage considerations
Parts of Arundel include conservation areas and listed buildings. Many roof-mounted PV systems are permitted development, but listed properties and some street-facing installations may require consent. Early consultation saves time. Discreet panel layouts, black frames and in-roof systems can reduce visual impact where aesthetics matter.
Quality, coordination and aftercare
Good outcomes rely on coordination between the roofer and PV installer. We handle structural checks, set-out, weathering details and final inspections. After installation we recommend periodic checks for slipped tiles, loose fixings and clear drainage. Seasonal debris should be cleared safely to keep arrays performing well.
Plan your Arundel PV-ready roof
Whether you are re-roofing a cottage near the castle or adding panels to a family home on the outskirts, the right timing, fixings and flashing will protect your roof and your investment. For surveys, design support and tidy installation, contact Roofing Arundel and we will help you get it right first time.