Pitched Roof Insulated Above and Below Rafters

This retrofit pitched roof system uses Isolair Multi Insulation Boards in conjunction with a choice of semi rigid batts / flexible insulation, breathable membrane and a lime plaster finish.

This system offers high protection from summertime overheating, outstanding thermal performance, humidity regulation, acoustic insulation and superior sustainability credentials. This low embodied carbon solution is a great choice for specifiers and homeowners alike. Wood fibre roofs are a sustainable and reliable system for upgrading the UKs existing buildings.

3D Insulated Pitched Roof

SYSTEM PERFORMANCE

U-values
0.26 – 0.08 W/m2.K

y-values
Available upon request from insulation manufacturer.

PRODUCT DOWNLOADS

Pitched Roof – U-Value Guide

Pitched Roof – Technical Manual

Pitched Roof – Take Off Form

Retrofit Roof Pitched Externally Fitted System Sheet

BBA – Pitched Roof

10 Year Warranty

Manufacturers Website

CROSS SECTION OF SYSTEM

  1. Roofing (tiles, slates, sheeting etc.)
  2. 50mm minimum ventilation zone
    – 25mm tiling batten
    – 38mm counter batten with PAVAFIX SN BAND
  3. Breathable membrane
    – 18°+ = ADB Membrane (optional)
    – 15-18°= ADB Membrane
    – 5-15 ° = UDB Membrane
  1. Above rafter insulation – ISOLAIR MULTI
  2. Full fill rafter insulation – PAVAFLEX / PAVATEXTIL-P / ISOLENA OPTIMAL (sheep wool) / INDITHERM
  3. Airtighness and support layer – DB3.5 MEMBRANE
  1. Below rafter insulation – ISOLAIR-MULTI
  2. 6-8mm Baumit RK70N lime plaster base coat with STARTEX embedded mesh
  3. 3-4mm Baumit RK70N lime plaster finish coat

COMPONENTS AND ACCESSORIES FOR PITCHED EXTERNALLY FITTED