Care Home Roof Survey 2026 — 6 Factors Before Solar Install

The single most common question we get from care home operators considering solar isn’t about cost or grants — it’s “is my roof actually suitable?” The honest answer for most UK care homes is yes, but six specific factors determine the right approach. This piece sets out what we check at survey, what’s a deal-breaker, and what’s a workable compromise.

Factor 1 — Roof condition and remaining life

Solar panels have a 25–30 year operating life. Installing them on a roof with 5–8 years of remaining life means you’ll be paying to remove and refit the system mid-life — typically £4–£12 per panel, or £240–£720 for a 60-panel install.

What we check:

• Visual condition — slipped tiles, cracked slates, ridge tile condition, flashing integrity
• Underlay condition (where accessible) — moisture damage, sagging, tear damage from previous works
• Roof structure — visible signs of stress, sagging, prior repair patches
• Pitched vs flat differentiation — pitched roofs are typically assessed for tile/slate condition; flat roofs for membrane condition and ponding

The honest assessment. If the roof has fewer than 10 years of remaining life and no co-ordinated reroofing plan, we’ll recommend reroof + solar as a combined capital project rather than installing on a tired roof. The combined approach typically adds £40–£80/sqm in reroof costs to the solar capex, but secures 25+ years of remaining roof life for the install.

Factor 2 — Asbestos in pre-1980 stock

A significant proportion of UK care home stock is in converted Victorian and Edwardian buildings, with outbuildings, ancillary structures, or original sections containing asbestos roofing. Asbestos cement corrugated roofing was widely used through to the 1980 UK import ban.

An HSE-compliant asbestos survey is mandatory under the Control of Asbestos Regulations 2012 before any roof works. Three install options where asbestos is identified:

1. Non-penetrating clamp install over non-friable asbestos cement — viable for sound corrugated asbestos roofing where the install doesn’t disturb the existing surface. Zero additional cost over standard install. Suitable where asbestos is in stable condition.

2. Encapsulation then install — a non-asbestos coating sealed over the existing surface, then standard solar install on top. £5,000–£15,000 additional cost. Useful where the asbestos is showing surface wear.

3. Strip and replace — full removal of asbestos roofing (HSE-licensed contractor, controlled-area disposal) and replacement with composite or steel before solar install. £15,000–£40,000 additional cost. Required where the asbestos is degraded or friable.

The asbestos survey costs £300–£800 and is mandatory regardless of the install approach chosen. We coordinate it as part of the pre-install survey programme.

Factor 3 — Structural loading capacity

Modern UK care home buildings (post-2000 builds) almost universally support solar PV without structural reinforcement. The dead load of a typical commercial PV install is 12–18 kg/sqm — well within standard commercial roof design loadings (typically 75–150 kg/sqm).

Where structural checks raise concerns:

• Older converted buildings — Victorian / Edwardian housing converted to care use. Original timber roof structures may have been designed for tile dead loads but not necessarily for additional installed plant. Structural engineer review typically required — £400–£900 per site.
• Mansard and extension roofs — common on care home conversions. Sometimes built with marginal structural redundancy. Selective reinforcement may be needed — £2,000–£10,000 if required.
• Flat-roof extensions on Victorian conversions — particularly common to add structural concern. Ballast-style mounting systems (no roof penetration) may be acceptable where penetrating fixings would compromise the membrane warranty.

We engage a structural engineer for any building constructed pre-2000 or showing signs of structural compromise at visual survey.

Factor 4 — Orientation and shading

Optimal UK solar orientation is between SSE (155°) and SSW (210°), with pitches between 30° and 40°. Real-world performance falls off gradually outside this range:

• East-facing or west-facing roof at 30° pitch: ~88% of optimal yield
• North-facing roof at 30° pitch: ~62% of optimal yield (generally not viable economically)
• Flat roof (0° pitch): ~85% of optimal yield with tilted mounting frames (10–15° from horizontal)
• Steep pitch (50°+): ~95% of optimal yield if SSW orientation

Shading is critical. Even modest shading on a portion of the array (a tree, a chimney, an adjacent building) can reduce total system output by 30–60% if it crosses key generation windows. We use shading analysis tools at survey to model annual yield with site-specific shading included.

Where shading is significant but unavoidable, we specify panel-level microinverters or DC optimisers — these isolate shaded panels from the rest of the string, limiting the system-wide impact. Cost premium is typically 8–15% of the inverter line item.

Factor 5 — Listed buildings and conservation areas

Around 8% of UK care home stock is listed or in conservation areas. The planning treatment of solar on listed buildings depends on grade and visibility:

• Grade I and II* — typically rooftop solar is rarely permitted. Ground-mount or canopy alternatives more often viable. LBC application process is intensive — 16–24 weeks typical, 50–60% approval rate.
• Grade II — frequently achievable on non-public-facing roof slopes with sympathetic flashing to match existing roofing material. 12–16 weeks application timeline. Around 70% approval rate on well-prepared applications.
• Conservation areas (non-listed) — Article 4 Directions may apply requiring formal planning even where solar would otherwise be permitted development. 8–12 weeks. High approval rate.

We coordinate LBC and conservation area applications with a heritage consultant where required. Heritage consultant fees: £1,500–£3,500 per site.

Factor 6 — Roof access and scaffolding

Practical install factors often overlooked at the desk-feasibility stage:

• Scaffolding access — multi-story buildings or sites with restricted ground-level access (constrained by gardens, parking, adjacent buildings) may require specialist access equipment. Cost variation: standard scaffold £3,000–£8,000 vs cherry-picker or mobile elevating work platform £6,000–£15,000.
• Roof access points — internal access via loft hatch is preferred where available; external scaffold-mounted access otherwise.
• Plant room location — inverters and (where specified) battery storage need a dedicated plant location. Internal cupboard space, garage, or external prefab plant room — we identify at survey.
• Cable runs — DC cable from panels to inverter, AC cable from inverter to consumer unit. Long cable runs add cost (typically £8–£15/m installed). Internal service void routing preferred where available.

The pre-install survey we deliver

Every quote includes a free pre-install survey covering all six factors above. Typical survey takes 90–120 minutes on site, delivered by an MCS-qualified surveyor. Output is a written feasibility report covering:

• Roof condition assessment
• Asbestos survey conclusion (or referral to specialist if survey required)
• Structural loading assessment
• Orientation and shading analysis with annual yield projection
• Planning status and LBC/conservation considerations
• Access and plant location recommendations
• System size recommendation with rationale
• Fixed-price proposal valid for 90 days

For more on what a typical care home install looks like, see our cost guide and funding routes.