4" Flat Roof Flashing Steel (0 - 5°)

Our Price: £66.14 Incl. VAT: £79.37

Availability: In stock

Product Code: TWFF04

4" Flat Flashing (Steel) T/W



 Twin wall Warranty

4" Flat Roof Flashing (0 - 5°) used to weather-proof the system on exit from the roof.

Made of 316 Stainless Steel. 

(Please note: We base all of our twin wall system on the internal diameter measurement. This product is not suitable for use with single skin stove pipe).


Same day dispatch if ordered before 2pm.


 Flat Flashing (Steel) T/W



View Our Installation Guides:

Bungalow Internal Installation

Bungalow Installation guide

External House Installations

External Installation

Straight Internal Installation

Ventilation Installations


Our twin wall insulated is a simple push-fit  joint system. Build your system by placing each piece on top of the previous and push together to make the join. This is the simplest system to construct on the market today.


Building Regulations

Download Building Regulations Document J (effective October 2010) below

Download Document J

(Right click link, then select "save file as..")