Installation manual Photovoltaic mounting kit for slate roofs

Installation guide Photovoltaic mounting kit for slate roofs

Step-by-step instructions for installation on a slate roof

Before you start

Installation on a slate roof requires special precautions. Slate is more fragile than tiles, so a specialised, methodical approach is essential. If you have any doubts about the technique or the strength of the roof, you should always consult a qualified professional.

1 FITTING SLATE HOOKS

Equipment

Specialist slate hooks, anti-corrosion stainless steel screws, rafter detector, specialist slate tools.

Installation

1. Locating: Use a structure detector to precisely identify the rafters.
2. Positioning: Place the hook in a protected area of the slate, avoiding the edges.
3. Preparation: Gently grind the lugs if necessary, without weakening the slate.
4. Fixing: Screw into the rafter using stainless steel screws only, flush with the batten.
5. Adjustment: Adjust the height using the vertical adjustment system.
6. Finishing: Carefully replace the top slate.

⭐ Specific slate features

  • Fragility: Gentle handling mandatory
  • Watertightness: Absolute respect for integrity
  • Fixing: Reinforced anchoring points

✅ Inspections

Intact slates
Solid fixing
Stainless steel screws used
Height adjusted
Crochet ardoise étape 1
Crochet ardoise étape 2
Crochet ardoise étape 3
Crochet ardoise étape 4
Crochet ardoise étape 5

2 INSTALLING THE ALUMINIUM RAILS

Materials

40x40 aluminium rails, M10 bolts, fixing nuts, suitable spanner

Installation

1. Insertion: Slide an M10 bolt into the square guide of the rail.

2. Connection: Insert the bolt into the oblong hole in the hook.

3. Alignment: Check that all rails are perfectly aligned.

4. Tightening: Fasten permanently after checking that everything is in place.

⭐ Advantages of aluminium rails

  • Lightness: Reduced load on the slate
  • Precision: Exact sliding system
  • Durability: Optimum weather resistance

✅ Controls

Rails aligned
Bolts tight
Perfect parallelism
Stable fixing
Rail étape 1
Rail étape 2
Rail étape 3
Rail étape 4

3 FITTING THE SOLAR PANELS

Materials

Solar panels, end clamps (4), middle clamps (depending on configuration), M8 bolts

⚙️ Configuration

1 panel: 4 end clamps at the 4 corners
Several panels: 4 end clamps + middle clamps between panels

Installation

1. Starting point: Start at an outer edge with a 1 cm margin.
2. Fixing: Install two external fixing clamps at the ends.
3. Checking: The panel must be perfectly parallel to the ridge.
4. Extension: Add the following panels with middle clamps

⭐ Advantages

  • Safety: Optimum hold on slate
  • Adaptability: Flexible modular system
  • Accuracy: Perfect alignment guaranteed

✅ Controls

Slates positioned
Margin respected
Ridge parallelism
Stable installation
Panneau étape 1
Panneau étape 2
Panneau étape 3
Panneau étape 4

Installation complete!

Your photovoltaic system on a slate roof is now ready. Carry out a complete check of the watertightness and all tightenings before commissioning.

⚠️ For safety reasons and to guarantee watertightness, always have your installation checked by a qualified professional specialising in slate roofs.

2025 WattUNeed - Slate photovoltaic installation guide