Category: Structure & materials
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
Thermal insulation is a layer that reduces heat flow through walls and roofs, such as polystyrene, rock wool or insulated blocks.
Why it matters on a project
The Saudi Building Code requires it for residential buildings, and it shows directly in the electricity bill and the size of AC units.
Measurement and pricing
Measured in square metres, stating thickness and density.
Common mistake
Leaving thermal bridges at columns and beams uninsulated, so heat leaks through them even with insulated walls.
Frequently asked questions
Is thermal insulation mandatory in Saudi Arabia?
Yes, the Saudi Building Code sets energy efficiency requirements for residential buildings, including insulation.
Where does insulation go on a roof?
Above or below the waterproofing depending on the approved system, with a protection layer and tiles or gravel.
Related terms
- WaterproofingLayers preventing water ingress into structural elements or spaces, such as bituminous membranes and cementitious coatings.
- Hollow-block (ribbed) slabA slab with concrete ribs between hollow blocks to reduce weight and increase spans.
- Plaster (render)A cement or gypsum layer applied to walls to level them before paint or cladding.
- Elevation (facade)A drawing of the building’s external face showing openings, materials and heights.
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