After Tack
Where a paint film dries up to a certain level but then remains tacky. This generally occurs when exterior varnishes based on a long oil medium is used.
Ageing
The appearance of a paint coating after years of exposure. Defects in the paint film ranging from cracking, crazing, flaking, loss of colour etc. This term may also relate to materials being stored by manufacturers to stabilise before sale.
Aggregate
Various types of fine minerals added in the manufacture of paint to provide a textured finish. The most common minerals are, sand, mica, stone grit of various sizes depending the build and texture required.
Air Bricks
Air Bricks
Where Installing air bricks are necessary, Building Regulations recommend they should be built in 1.5 to 2 metres. apart
They should also be set set at least 75mm above finished ground level.
The ground should be sloped away from the air brick vent to guard against water ingress.
Air Drying
Without heat or accelerators. The natural drying of a paint coating when exposed to air. Oxygen in air (oxidation) causes oil paints to set. In water based materials paint dries by evaporation.
