Pitched Externally Fitted
The retrofit pitched roof system featuring PAVATEX woodfibre can be installed form the external side of the build for situations where the existing internal finishing must remain in place.
Excellent thermal performance, high protection from summertime overheating, humidity regulation, acoustic insulation and superior sustainability credentials. This low embodied carbon solution is the first choice for specifiers and homeowners alike. Woodfibre roofs are the simple, yet sensible system for upgrading the UKs existing buildings.
The system is suitable for most external finishing options, including metal, clay and slate tiling. All bold components for the system are available from Unity Lime.
CROSS SECTION OF SYSTEM
- Roofing (tiles, slates, sheeting etc.)
- Min 50mm ventilation one.
– 25mm tiling batten
– 38mm counter batten with PAVAFIX SN BAND
- Breathable Membrane (Degrees)
– 18+ (Optional) ADB Membrane
– 15-18 = ADB Membrane
– 5-18 = UDB Membrane - Above Rafter Insulation
– ISOLAIR 40mm or greater
- Airtightness Membrane
– LDB 0.02 membrane - Between Rafter Insulation
– PAVAFLEX or
– PAVATEXTIL-P - Existing plasterboard, lath & plaster, or similar finish
COMPONENTS AND ACCESSORIES FOR PITCHED EXTERNALLY FITTED
-
ISOLAIR MULTI Wood Fibre Insulation Boards£18.47 – £1,232.00 -
PAVAFLEX Wood Fibre Insulation£29.87 – £520.00 -
PAVATEXTIL P Thermo-Acoustic Insulation£55.61 – £453.40 -
HECO TOPIX – Timber Fixings£11.01 – £89.46 -
STRH Timber Fixings + Washers – Box of 100£34.62 – £69.33 -
ADB Breatheable Sarking Membrane£200.67 (inc. VAT £240.80) -
PAVATEX LDB 0.02 Membrane£165.20 (inc. VAT £198.24) -
PAVATEX UDB Weldable Sarking Lining£422.80 (inc. VAT £507.36) -
ISO-BLOCO 600£13.79 – £20.56 -
PAVAFIX Airtightness Tape (60, 20/40, 150)£21.21 – £56.00 -
PAVAFIX SN Band – Screw Sealing Tape£10.64 (inc. VAT £12.77) -
PAVATAPE (75, 150) – External Weathertightness Tape£38.64 – £52.90 -
PAVATAPE 12 – Membrane Tape£14.84 (inc. VAT £17.81) -
PAVATAPE FLEX – Penetration Tape£17.08 (inc. VAT £20.50) -
PAVAPRIM Primer – 1L£17.50 (inc. VAT £21.00) -
Eaves Vent Strip – Aluminium – 2.5m£13.53
SYSTEM PERFORMANCE
Airtightness
5 – 0.6 @50pa
u-values
0.35 – 0.10
y-values
0.05 – 0.02