What is an improved Dutch pantile?
The improved Dutch pantile (VH) is an interlocking version of the Dutch pantile with head and side interlocks and a flatter wave, made since around 1900.
What is an improved Dutch truss?
An improved Dutch truss is a purlin-roof truss, usually with a masonry knee wall, that carries the roof load mainly onto the floor and creates more usable attic space.
What is a veranda?
A veranda is a roofed outdoor space attached to a house, open at the front and often the sides. How it differs from a conservatory, terrace, patio and canopy.
What is a venturi wind turbine?
A venturi wind turbine uses a funnel or shroud to speed up the wind at the rotor. How it works, its variants and an honest look at what it really yields.
What is a ventilation duct?
A ventilation duct carries air into or out of a building: from the periscope vent that ventilates a crawl space to the vertical extract shaft. Types and tips.
What is the window tax?
The window tax was a historic property tax based on the number of windows, levied in England from 1696 to 1851 and in France and the Netherlands too.
What is a window sill?
A window sill closes off the wall opening below a window: inside as a board or ledge, outside as a sloping sill that throws rainwater clear of the wall.
What is a velarium?
A velarium (or velum) was a large retractable awning stretched over the seating of a Roman amphitheatre or theatre to shade spectators from the sun.
What is clamp firing?
Clamp firing is a traditional way of burning bricks in which the stacked green bricks form the kiln themselves, with no permanent walls.
What is the working load limit?
The working load limit (WLL) is the maximum load a sling, chain or other lifting accessory may carry: its breaking load divided by a safety factor.