JB Construction & Restoration

Glastering

About glaster

glaster is a blend of lime (binder) and recycled glass (aggregate), to make plasters, renders and mortars which are suitable for old buildings, ecological new builds or for those wanting to add a surface finish with a difference.

Why Lime?

• has been successfully used in building for over 4000 years
• helps to control condensation and damp, thus creating a healthier building
• enables other susutainable building materials to be used such as wood, straw, woodfibre boards, clay and earth
• can be recycled at the end of its useful life and will allow other building components to potentially be reclaimed and reused
• is less damaging to the environment compared to its modern counterparts

Why Glass?

• reduces the level of sand extraction
• develops a market for a waste product

Why glaster™?

• technically excellent with some performance advantages
• hand or spray application
• building and occupant health benefits
• produces a beautiful, unique aesthetic, (which can be varied by combining different colours of glass with natural pigments added to the lime)

Where?

• most conventional backgrounds - stone, brick, block and building boards
• for building or pointing up-stonework, brickwork or blocks
• externally as a render with a flat or roughcast finish
• internally as a plaster which can be painted, trowelled to a smooth finish or sponged to reveal more glass

glaster products are available in two premixed ranges:

1. Traditional ‘Ready-to-use’ – manufactured using traditional fat lime putty and recycled crushed glass. This product range is ideal for plastering internally or repairing old buildings where it is important to maintain the flexibility and vapour permeability of the building. It is ready-to-use and simply requires ‘knocking-up’, prior to application.
2. Dry Hydraulic – manufactured using hydraulic limes and recycled glass. The three strengths are available:
   NHL5 – Eminently Hydraulic – used in ‘extreme’ circumstances where a quicker, harder set is required usually as a mortar or for flooring;
   NHL3.5 – Moderately Hydraulic – used in more ‘usual’ conditions e.g. stone, brick or block work as a render, plaster or mortar.
   NHL2 – Feebly Hydraulic – used for softer bricks and stone as a plaster or mortar.
   This range is supplied as a dry-premix to which water must be added on-site and then mixed in a mill/site mixer.

The raw materials comply with:

Glass Aggregate:  BS EN 13139, 2002
Natural Hydraulic Lime:  BS EN 459, PART1 2001
Quick Lime:  BS EN 459, PART 1 2001

The information contained on this page is from the information supplies by Calch Ty-Mawr Lime, who manufacture this product.