What is vitrification (verglazen)?
The Dutch verglazen means becoming or making glassy: glazing ceramics, silica melting and solidifying as clay is fired (vitrification), or fitting new glass in a window.
What is a rainwater head (hopper head)?
A rainwater head or hopper head is an open box between a roof outlet and a downpipe that briefly collects rainwater, joins downpipes and shows when a pipe is blocked.
What is a painting specification (verfbestek)?
A painting specification sets out the painting work: which surfaces, how they are prepared, which paint system goes on each material and in what order the work is done.
What is a vereveningsleiding (pressure equalisation pipe)?
A vereveningsleiding runs alongside a discharge stack and equalises air pressure, especially at offsets. How it differs from a vent stack and an air admittance valve.
What is wood preservation?
Wood preservation protects timber against fungi and insects: by impregnation, thermal modification, acetylation or silicification. An overview of the methods.
What is nail setting?
Nail setting means driving a nail head just below the timber surface with a nail set, so it can be hidden. How to do it, for example when nailing parquet.
What is balancing winders?
Balancing winders means spreading the tapered treads of a turning stair so the going stays equal on the walking line. Methods, Dutch rules and common mistakes.
What is an upper floor?
An upper floor (Dutch: verdieping) is a storey above the ground floor. Learn how it differs from a storey and why counting floors so often causes confusion.
What is the degree of compactability?
The degree of compactability shows how stiff fresh concrete is, measured with the Walz compaction test. Plus how it differs from the degree of compaction of soil.
What is concrete compaction?
Compaction means driving air and voids out of a material so it becomes denser and stronger. Above all for concrete (poker vibrator, screed beam) and for soil.