Roof tile
New Roof Tile
Introduction
(Context)
Revised Roof Structure
The premise of the mock-up experiment originated from the excessive heat experienced in attic spaces due to the implementation of metal corrugated sheets into the roof structure. The mockup experiment entails the removal of these metal sheets, thereby reverting to traditional roof construction while ensuring the roof’s water-tightness and breathability. Two novel materials are introduced: a breathable moisture-barrier membrane and lime mortar bedding.
To preserve the authenticity of the existing roof structure, the timber rafters and purlins will be retained as much as possible. Alterations to the roof structure will include installing marine plywood layers on the top and bottom of the roof insulation, spaced with a small ‘penny gap’ to allow for air circulation between each panel. Additionally, a breathable moisture barrier will be incorporated to facilitate air movement while preventing water infiltration. The timber purlins that support the roof tiles will be reinforced with a lime mortar bed, which not only strengthens the adhesion of the roof rafters but also functions as the first layer of protection against penetrative rain as a breathable moisture barrier.
Surface Temperature Performance
The following data was collected on the mock-up located at the backyard of NUS ArCLab to test the surface temperatures of various roof tiles installed. Using the 88598 K 4ch K SD Logger, sensors were set up on the top surface of the roof tile (1CH), bottom surface of the roof tile underlayer (2CH), middle of the roof structure between the roof tiles and the moisture barrier (3CH), and the internal soffit of the mock-up structure.