Spalling is where the top surface becomes detached from the main body of the substrate.
Spike Roller
A spike Roller is usually used when laying self levelling products such as epoxy flooring to eradicate air bubbles.
Stabilising Solution
Stabilising Solution is a low viscosity clear or slightly tinted oil based coating for consolidating powdery surfaces ready for overcoating with water or oil based paints. 
Sticker
Shaping of moulding produced by a wood plane or Sticker machine. 
https://www.youtube.com/watch?v=gxSOzfjcPHU
String
The two outer sections of a staircase where either one or both sides are fix to the adjoining walls
Tanalised Timber
Tanalised timber.
TANALISED, is timber which has been impregnated with TANALITH (a combination of copper and organic biocide) wood preservative. See VAC-VAC.
Timber treated in the same pressurised chambers as for the Vac-Vac process
and is more associated with sawn timber and coloured green or brown.
Generally used for external works such as fencing, sheds, posts and cladding.
Tannic Acid in Wood
Tannic Acid
Tannins in wood is held in the the sap and or residue and is activate during the timber drying process, when the moisture carries the Tannis onto the timber surface. The staining is shown byway of a yellowish, dark grey or blueish colour. As this residual staining will bleed through an applied paint coating special primers have to used.
Translucent Wood Finishes
Semi-opaque wood finishes, which allow the natural woodgrain and texture to be seen through the film.
The degree of transparency is depends on colour with the lighter tints such Light Oak being the most transparent and darker colours such as Ebony and Walnut being less transparent.