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Integrated In-Roof Solar for Complete Roof Replacements
When completely replacing a worn-out roof, in-roof (integrated) solar panels become an incredibly smart, highly competitive option. Because your roof is already being stripped down to the rafters, the typical downsides of a premium integrated system—such as standalone structural disruption—are completely wiped out.
The Financial Advantage of Re-Roofing
Choosing an in-roof system during a full roof replacement saves a significant amount of money on core building materials. The solar panels act as the actual watertight exterior layer of your property. Consequently, your roofing team does not need to buy or lay traditional tiles for that section of the roof.
  • Shared Scaffolding: A single scaffold setup covers both the new roof installation and the solar team, saving you £1,000–£1,500 in standalone setup fees.

  • Offset Tile Costs: You skip buying roughly 10 to 15 square metres of slate or concrete tiles, directly offsetting the integrated equipment premium.

  • No Extra Brackets: You completely avoid the material costs of standard on-roof mounting rails and external rail clamps.


Direct Project Comparison
New Roof + On-Roof Panels
  • Aesthetics: Visible, sits proudly above new tiles.

  • Material Savings: None (you pay for a full roof of tiles).

  • Structural Loading: Higher; panels sit on top of the heavy tile layer.

  • Long-Term Roof Life: Shorter; brackets put pinpoint stress on new tiles.

  • Pest Risk: Pigeons may still nest in the gap.

New Roof + In-Roof Panels
  • Aesthetics: Completely flush, looks built-in.

  • Material Savings: High (solar replaces a section of tiles).

  • Structural Loading: Lower; panels replace the weight of heavy tiles.

  • Long-Term Roof Life: Longer; seamless integration protects the roof structure.

  • Pest Risk: Zero gap means zero pest risk.
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Which Option Should You Choose?
Choose In-Roof (Integrated) if:
  • You prioritize the visual look, resale value, and sleek curb appeal of your property.

  • You want a lighter total physical load resting on your property's wooden rafters.

  • You want to permanently eliminate the risk of birds nesting under the panels without paying for extra bird mesh.

  • You are using premium roofing materials (like high-end slate), where the cost savings from omitting tiles are at their absolute highest.
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 Real-World Financial Analysis & Project Breakdown,example
Combining a full roof replacement using standard concrete flat tiles, such as the Marley Modern Concrete Roof Tile, with a brand-new solar setup provides an excellent, beautifully integrated project.
The estimates detailed below assume a typical 3-bedroom semi-detached home with a standard roof size of 75m².
1. Baseline Cost: New Roof Only
  • Total Estimate: £7,500 – £11,500
  • What's Included: Full scaffolding, stripping away and disposing of your worn-out tiles, installing a new high-quality breathable membrane, fixing new wooden battens, and laying a complete covering of flat concrete interlocking tiles (covering roughly 10 tiles per m²).
2. Option A: New Roof + Traditional On-Roof Solar (4kW System)
  • Total Estimate: £12,500 – £16,500
  • The Breakdown: Roof replacement (£7,500 – £11,500) + On-roof solar installation (£5,000 – £6,000 retrofit premium removed due to shared scaffolding).
  • The Reality: The roofers will tile your entire roof with Marley flat tiles. The solar team will then install brackets on top of the tiles and mount standard panels above them.
3. Option B: New Roof + Marley SolarTile In-Roof Integrated Solar (4kW System)
  • Total Estimate: £13,000 – £17,500
  • The Breakdown: Roof replacement (£7,500 – £11,500) + Marley SolarTile Portrait Package Kit with Inverter (£4,500 – £5,500) + Coordinated roofing labour (£1,000 – £1,500) MINUS the tile material savings (approx. £300–£400 saved from not buying flat concrete tiles for that 20m² solar footprint).
Crucial Project Tips for Marley Flat Tiles
  • Achieving a Flush Aesthetic: Marley Modern flat tiles are highly uniform and slate-like. Because they are flat, pairing them with the Marley SolarTile creates a beautifully seamless, perfectly smooth roof surface that looks incredibly premium.
  • The 25% Insulation Rule: Under current UK Building Regulations, replacing more than 25% of an existing roof structure requires you to upgrade your loft insulation to modern thermal standards. Budget an extra £400–£800 if your current loft insulation is thin.
 Coordinate Your Roofing & Solar Project Seamlessly
Combining a roof replacement with an integrated solar installation requires careful technical coordination between roofers and solar technicians. Solar Harvester Ltd manage the entire project framework for you—from initial scaffolding setup to the final watertight interlocking certification.
Contact our installation team today to discuss your upcoming roof project. We will provide a transparent, combined estimate for your re-roofing and Marley SolarTile integration across Anglesey, North Wales, and
        Get in touch today for straightforward, expert advice on your Solar Roofing investment.