
Project 04 · Roundhay, Leeds
Extension flat roof & rooflight
Ponding felt replaced with a seamless EPDM membrane, new insulation and a lantern rooflight – two days.
- System
- EPDM rubber membrane
- Area
- 24 m²
- On site
- 2 days
- Guarantee
- Example: 20 yr membrane
01Before / After


02Scope
- 01Strip felt and rotten decking
- 02New OSB3 deck with a proper fall
- 03Warm-roof insulation boards
- 04One-piece EPDM membrane
- 05Glass lantern rooflight fitted
- 06New trims and gutter
03Timeline
- Day 1
Strip, new deck and insulation, watertight by evening
- Day 2
Membrane, rooflight, trims and gutter
04Materials
- Membrane
- 1.2 mm EPDM, single sheet
- Deck
- 18 mm OSB3
- Insulation
- PIR warm-roof boards
- Rooflight
- Double-glazed lantern
- Trims
- GRP edge trims
05Gallery
Example project and photos created for this demo design.
Next projectStone semi, full re-roofHorsforth, Leeds