What is a tierceron?
A tierceron is a secondary rib in a Gothic vault that runs from the springing to the ridge rib without passing through the central boss.
What is a home battery?
A home battery stores electricity, usually surplus power from solar panels, so you can use it yourself later. Learn about capacity, costs and safety.
What is Thonet?
Thonet is the furniture maker Michael Thonet and his firm Gebrüder Thonet, famous for chairs of steam-bent solid beech such as the No. 14 café chair.
What is a thermoplastic?
A thermoplastic is a plastic that softens when heated and hardens again on cooling, repeatedly, so it can be welded, bent and recycled.
What is a thermoset?
A thermoset is a plastic that cures into a rigid 3D molecular network and no longer melts when heated, such as epoxy, polyester and PIR.
What is a thermographic survey?
A thermographic survey uses an infrared camera to show surface temperatures, revealing missing insulation, thermal bridges, air leaks and damp.
What is thermal insulation?
Thermal insulation limits heat flow through floors, walls and roofs using materials that conduct heat poorly, saving energy and preventing condensation.
What is a solar thermal roof?
A solar thermal roof has fluid-filled pipes in or just under the roof covering that collect solar heat, usually as a source for a heat pump.
What are Roman thermae?
Roman thermae were large public bath complexes with rooms from cold to hot, heated by a hypocaust and roofed with vaults and domes.
What is a theodolite?
A theodolite is an optical or electronic surveying instrument that measures horizontal and vertical angles very accurately, used for setting out buildings.