Pitched Externally Fitted

The system complies with the most stringent of standards – from baseline building regulations through to Passivhaus.

The system is suitable for most external finishing options including metal, clay and slate tiling. All components for the system are available from NBT.

house-retrofit-roof-pitched Created with Sketch.

System Image

Cross Section of System

  1. Existing/reclaimed/new tiles/slates
  2. Tile Batten
  3. New counter batten (min. 25 for ventilation). Please contact for metal roof
  4. NBT ISOLAIR 35mm or PAVATHERM PLUS
  5. NBT LDB 0.02 retrofit membrane
  6. NBT PAVAFLEX between existing rafter
  7. Existing plasterboard or similar finish

Product Downloads

System Performance

u-values
0.30 - 0.10
y-values
0.05 - 0.02
Airtightness
5 - 0.6 @50pa

Components and Accessories for Pitched Externally Fitted

1

Isoroof

2

Retrofit Membrane: LDB 0.02

3

Pavaflex

4

TKR 4.8

5

Pavafix SN Band Tape

6

Pavatape: 75/150

7

Pavabase