With insulation inside of the structure, a traditional cold roof means the membrane is adhered directly to the roof substrate.

 

CodeMark Certificate BRANZ Appraisal View Technical Documents

What substrate is used with a cold roof?

What substrate is used with a cold roof?

In most situations either plywood or concrete is used as a substrate. Ventilation through Nuravent accessories is common.

prev next
What is a Cold Roof?

What is a Cold Roof?

A cold roof is roof in which the thermal insulation layer is located between the ceiling joists meaning that everything above the insulation, such as the rafters, and any roof space, will be colder than the living space below it

prev next
What do you require for a cold roof?

What do you require for a cold roof?

With height to boundary constraints a cold roof is a great option. You will need ventilation which can be achieved by various Nuralite accessories.

prev next

System Benefits

  • Fully welded membrane systems.
  • Variety of colours and appearance available.
  • 20-year product warranty.
  • CodeMark certificate for building code compliance.
  • Can reduce overall height by fitting insulation between rafters.
Vector Arena
Otahuhu Train and Bus Interchange

Otahuhu Train and Bus Interchange

“With a focus on the historical and cultural significance of being in Auckland's isthmus, the building aimed to be a landmark building in Otahuhu.”

Read project

Te Atatu Library

Te Atatu Library

Moller Architects

Waiheke House

Waiheke House

Archoffice

Whare Mahanga- Twin House

Whare Mahanga- Twin House

Scarlet Architects

Otahuhu Station

Otahuhu Station

Jasmax

Cold Roof Fall/Slope Table

Substrate Plywood Concrete Existing Substrates
Minimum Finished (Constructed) Falls 1:80 1:80 1:80
Recommended Design Fall (excluding gutters) (A) 1:40 1:60 1:60 Confirm no ponding areas
Gutters 1:100 1:100 1:100
Substrate Comments Using 17mm (roofs) or 21mm (decks) plywood, rafters at 600 centers, nogs at 600 centers. Create required slope with a screed. Wait for concrete and screed to cure. Confirm substrate is sound.
Need a Flat Roof Design Guide? Get It Now