Telling Lime Limited Booths Hall Booths Park Chelford Road Knutsford Cheshire WA16 8GS. Tel: 01565 756110 Email: info@tellinglime.co.uk Web: www.tellinglime.com

TELLING LIME
UNILIT NATURAL HYDRAULIC LIME PLASTERS AND RENDERS
CORIDECOR LIME PUTTY PLASTER AND RENDER POLISHED FINISHES

PLASTERED/ RENDERED/ ROUGHCAST COATINGS

Telling Lime - Natural Hydraulic Lime
Telling Lime manufacture and are distributors for a range of natural lime mortar products for various applications, together with stabilisation and consolidation grouts, mesh reinforcement and lime paints and finishes. The natural hydraulic lime products replicate the strength, porosity, adhesion, vapour permeability and flexibility of historic mortars.

Unilit mortars conform to European Standard ENV 459-1 for natural hydraulic lime mortars. The products are manufactured using a modern day manufacturing process, are guaranteed against failure for 10 years and are warranted against defect under a professional indemnity insurance. Telling also manufacture a range of bonding agents for use with Unilit mortars. 

Unilit 20 - Lightweight insulating mortar.

Unilit 20.
A dry, premixed lightweight insulating mortar based on perlites and natural hydraulic lime which is very vapour permeable and has extraction qualities which will promote the drying out of the humidity and moisture in the walls. The perlite, in varying granular sizes, ensures a light mortar with high thermal strength and adhesive properties.
Where applied as an externally render Unilit 20 has the advantage of the insulation being placed on the outside of the wall and therefore not only increasing the insulation of the wall, but also can remove the dew point to outside the wall and prevent cold bridging, the effects of thermal shock and the condensation of water liquid in the wall. Where applied internally, Unilit 20 has the advantage of the insulation being placed in the plaster therefore increasing the insulation of the wall without loss of internal space. The lightweight properties of Unilit 20 (approx. 1/5 of the weight of traditional mortars) enable up to 40mm to be applied in one layer and subsequent layers to be applied without putting excessive strain on the existing structure.
Unilit 20 can be used in both new construction and renovation and forms the insulation layer of the Unilit system, and can be applied wherever thermal insulation is required. An overall application of Unilit 20 ensures the elimination of cold bridging and damage to the structure by thermal shock.
Technical information including U value calculations and glaser diagrams are available from Telling Lime Limited.
Unilit 20 is designed to be built up in layers of up to 40mm thick, (20mm for first two coats) to the required thickness dependant on the desired insulation value, with a weatherproof finishing layer of Unilit 40 or Unilit 15P2H externally or Unilit 45, 40, 65 internally. A colour finish can be applied with a lime paint - specify in section M60 - Lime wash and lime paint finishes are available from Telling Lime. Alternatively a through coloured finish - Unilit 65f/65M/65N or a Telling Cori polished finish can be applied.
Basements and other areas susceptible to rising damp must be treated with Unilit 30 mortar in place of or prior to application of Unilit 20.
The use of Telling stainless steel brick mesh is recommended where there is a likelihood of structural movement. This mesh is coated with nodules of fired clay (brick) which produces a mineral bond between the render and the mesh to ensure fusion of lime to the natural mineral coating on the mesh.
Colour:                                                              Beige.
Packaging:                                                         13 kg bags, in powder form.
Density:                                                             350 kg/m³.
Tensile strength:                                                 0.6 N/mm².
Compressive strength:                                        3 N/mm².
Vapour diffusion resistance    :                            µ= 4.
Coefficient of thermal conductivity:                     0.066 W/m °K.
pH:                                                                    > 10.5.
Fire classification:                                              Non-flammable (M.O.)

Waterproofing and Stabilising layer - Unilit 30 waterproofing and stabilising layer.
Apply Unilit 30 as the undercoat mortar for plastering and rendering of internal and external walls below ground level, up to approx. 1 meter above ground level and other areas where damp and/or salts are present or expected. Unilit 30 is impermeable to water but very vapour permeable and can be used as an undercoat or as a coarse finishing coat as part of a Unilit mortar system. The mortar can be applied to damp walls of buildings and cellars. 
Where high levels of damp and salts are prevalent, e.g. basement walls the minimum total layer thickness of Unilit 30 must be 20 mm, for the minimum waterproofing performance the minimum total layer thickness must be 12 to 15mm.
Unilit 30 can either be applied as a pre treatment prior to applying Unilit 20, or as the first 15 - 20mm render thickness in place of Unilit 20 where greater thickness is required. Where applied in adjacent areas to the same thickness a finishing coat should be applied over both Unilit 20 and Unilit 30 to give a uniform finish.
If a finish or following layers are applied to Unilit 30 after 1 week (or where Unilit 30 has fully dried), a bonding layer of Unilit 15/P1 or 15/ P2 is required.

Finishing layer - Unilit 40.
A dry, premixed mineral finishing mortar based on hydraulic, naturally pure and selected lime, and completely compatible with the Unilit system. Unilit 40 is a smooth or fine textured weatherproof finish for external use and internal use where high levels of damp and salts are prevalent.  Designed for applications where resistance against high impact and atmospheric influences are required and situations where rising damp or capillary action is prevalent, such as damp walls of buildings and cellars. The mortar is water repellent but very vapour permeable, allowing humidity present in the wall to be able to rapidly migrate from the structure.
A colour finish can be applied with a lime paint - Corical - Lime wash and lime paint finishes are available from Telling Lime. Alternatively a through coloured finish - Unilit 65f/65M/65N or a Telling Cori polished finish can be applied over the Unilit 40.
Consult Telling technical service department for advice on the suitability of the substrate.
Consult with Unilit technical literature for details. Natural hydraulic lime mortars are specialist products and it is recommended that Telling Lime are consulted early in the design process.

Preparation: The substrate must be clean and free of all traces of oil and grease. When the substrate has been treated with an impregnating product (silicones or similar) it is recommended to consult the supplier or manufacturer.
Bonding agent: Unilit 10 / Unilit 15/P2.
Manufacturer: Telling Lime Limited, Booths Hall, Booths Park, Chelford Road, Knutsford, Cheshire, WA16 8GS. Tel: 01565 756110 Email: info@tellinglime.co.uk  Web: www.tellinglime.com
Waterproofing and stabilising layer (if required): Unilit 30. (for basements and other places susceptible to rising damp or high levels of damp or salts). see Unilit 30 clause.
Application: Mix Unilit 30 with clean water - 4.5 to 5.25 litres of water to 30 kg of powder depending on the temperature and substrate. Mix manually or mechanically for 3 to 4 minutes.
Apply directly to either a dry or damp substrate. If the substrate is too dry, dampen down the surface prior to overcoating. Do not apply in temperatures below 5°C or above 40°C. The mortar remains workable for 2 hours and dries in 24-48 hours. Protect from frost for 48 to 72 hours.
Maximum thickness per layer: 15-20 mm.
Minimum total thickness of layers: 12 - 15mm for minimum waterproof performance, 20 mm for maximum waterproof performance e.g. for excessively damp and salt laden areas, basement walls and areas below ground level.
Undercoats: Premixed natural hydraulic lime mortar.
Product reference: Unilit 20.
Fibre reinforcement: Seek advice from Telling. Not required
Thickness (excluding dubbing out): 20 - 30mm maximum layer thickness to required thickness to achieve desired insulation value.
Application: Mix Unilit 20 with clean water - 10 to 12 litres of water to 13 kg of powder depending on the temperature and substrate. Mix mechanically with a paddle whisk or concrete mixer with a minimum capacity of 200 litres, for 3 to 5 minutes.
Apply manually or mechanically to a dry or damp substrate in 2 layers, allowing minimum 7 hours between coats. Do not apply in temperatures below 5°C or above 40°C. The mortar remains workable for 6 hours. Protect from frost for 48 to 72 hours. Do not use mortar below ground level unless applied over Unilit 30.
Allow Unilit 20 to dry for at least 7 days (3 weeks in the winter) before applying finishing coat of Unilit 40 finishing mortar.
Final coat: Premixed natural hydraulic lime finishing mortar - Unilit 40 must be applied for external use with a through coloured finishes or Paint applied over the Unilit 40.
Product reference: Unilit 40. / Unilit 45 / Unilit 65
Thickness: 3-4 mm (fine finish) 3 - 5mm (medium finish) 4 - 6mm (coarse finish) overall.
Finish: Seek advice from Telling. depending on product and desired finish- trowelled, wood floated, sponged.
Application:
(Unilit 40:) Smooth or fine textured weatherproof (water repellent) external render finish. See Unilit 40 clause.
Mix Unilit 40 with clean water - 4 to 5 litres of water to 25 kg of powder depending on the temperature and substrate. Mix manually or mechanically for 3 to 5 minutes.
Apply manually or mechanically to a dry or damp substrate in 2 layers of 2mm (wet on wet).
If the substrate is too dry, dampen down the surface prior to overcoating. Do not apply in temperatures below 5°C or above 40°C. The mortar remains workable for 2 hours and dries in 24-48 hours. Protect from frost for 48 to 72 hours. 
Accessories: Telling Brick Mesh Stainless steel mesh reinforcement.