ODE Starflex Loft Roll (100 mm & 200 mm) - Benefits, Specs & Installation Guide
Looking for a reliable, non-combustible loft insulation roll that’s easy to fit? ODE Starflex Loft Roll is a glass mineral wool insulation designed for cold lofts and between-floor applications. It offers dependable thermal performance (λ ≈ 0.044 W/m·K) and an A1 Euroclass fire rating, with 1200 mm-wide rolls to cover areas quickly.
Why choose ODE Starflex Loft Roll
- Energy efficient: Low thermal conductivity helps reduce heat loss through the roof.
- Non-combustible safety: Euroclass A1 rating supports compliance and peace of mind.
- Quick coverage: 1200 mm width suits standard joist centres (trim to fit).
- Easy to handle: Lightweight rolls cut cleanly; ideal for DIY and trade installs.
- Versatile: Use for initial loft upgrades and top-ups to reach modern depths (~270 mm typical in the UK).
Key specifications (at a glance)
| Attribute | 100 mm | 200 mm |
|---|---|---|
| Thermal conductivity (λ) | ≈ 0.044 W/m·K (glass mineral wool) | |
| Fire classification | Euroclass A1 (non-combustible) | |
| Roll width | 1200 mm | |
| Typical length / pack coverage* | ~10.8 m² per pack (varies by supplier) | 6.0 m × 1.2 m = 7.2 m² per pack |
| Service temperature | Up to 250 °C max (product dependent) | |
*Coverage values are typical examples; always check your product label or our product page before ordering.
Sources for key specs: manufacturer and distributor listings for ODE Starflex Loft Roll (λ 0.044 W/m·K, A1, 1200 mm width, and pack details).
100 mm vs 200 mm — which thickness should I pick?
| Scenario | 100 mm roll | 200 mm roll |
|---|---|---|
| Starting from little/no insulation | First layer between joists | Top-up cross-layer to approach ~270 mm total |
| Existing 100–150 mm in place | — | Top-up across joists |
| Fastest route to modern depth (~270 mm) | 100 mm between joists | + 170–200 mm cross-layer (trim thickness as required) |
| Storage planned in loft | Use raised decking/loft legs so top layer isn’t compressed | |
Current UK guidance commonly targets a minimum ~270 mm total loft insulation depth for mineral wool.
Coverage calculator
Packs needed = Total loft area (m²) ÷ Pack coverage (m²) → round up. Add 5–10% for cuts and obstacles.
| Loft area | 100 mm (≈10.8 m²/pack) | 200 mm (7.2 m²/pack) |
|---|---|---|
| 30 m² | 3 packs | 5 packs |
| 40 m² | 4 packs | 6 packs |
| 60 m² | 6 packs | 9 packs |
Installation (cold loft at ceiling level)
- Prep & safety: Wear gloves, mask and goggles. Lay temporary crawl boards; ensure good lighting.
- Clear & check: Move stored items. Check for damp, fix roof leaks, and keep eaves vents clear for ventilation.
- First layer between joists: Lay the 100 mm roll gently between joists - don’t compress. Cut around cables; keep 75 mm clearance to downlights/transformers or use approved covers.
- Cross-layer top-up: Lay the 200 mm roll at right angles to joists to minimise gaps/thermal bridges. Maintain a small gap to the roof deck at eaves for airflow.
- Perimeters & hatch: Take care around the loft perimeter to avoid blocking ventilation. Insulate and draught-seal the loft hatch.
- Services & tanks: Lag pipework; keep cold water tanks outside the insulated “cold” zone or insulate them adequately.
- Storage areas: If you need boarding, fit raised decking/loft legs above the top layer so insulation isn’t squashed.
Depth target: many UK guides recommend ~270 mm total mineral wool in lofts; avoid compressing the insulation as this reduces performance. :contentReference[oaicite:8]{index=8}
Good practice & common mistakes
- Do keep eaves ventilation clear.
- Do cross-layer the top roll to cover joists.
- Don’t block or cover downlights (use dedicated covers/clearances).
- Don’t compress the rolls under storage boards - raise the deck.
FAQs
Is ODE Starflex Loft Roll non-combustible?
Yes - it carries a Euroclass A1 fire classification (non-combustible).
What’s the thermal performance?
Manufacturer literature lists thermal conductivity around 0.044 W/m·K for the Loft Roll 44 range.
How many packs will I need?
Use the calculator above. As a guide, 200 mm packs often cover 7.2 m², while some 100 mm packs are around 10.8 m² - always confirm your pack’s label.
