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.
Breathable waterproofing and stabilising render - Unilit 30
Correct investigation to establish the cause of damp is essential and
wall thickness, temperature, ventilation and heat transmission all control the
movement of vapour as well as the structures ability to perform as a dry
element. Impervious sealers, decorative coatings and dense cementitious renders
can all adversely affect the building performance. The accumulation of
excess moisture behind these coatings and subsequent evaporation, through cracks
or flaws, lead to the build up of hydroscopic salts deposits. These cause
the spalling of the decoration and deterioration of the building fabric.
To seek a cure by synthetic over coating or mechanical extraction is to neglect
to tackle the cause of initial dampness, and can exacerbate the problem.
Available for application over damp and salt laden backgrounds, above and below
ground level, Unilit 30 offers a unique solution to this widespread situation
and can be utilised in salts containment applications such as in cellars and
against rising damp without the requirement for a damp proof course. This
products unique structure ensures optimum stabilisation along with salts
control.
Applied internally or externally as a render this
product is resistant to salts, impermeable to water liquid but very vapour
permeable and will therefore stabilise, reduce and control the level of dampness
and the concentration of salts in the wall and withstand the effects of rising
damp/capillary action. Unilit 30 achieves these properties by allowing the
moisture present in the wall to be continuously evacuated as vapour while
keeping the damp in the background away from decorative finishes, and preventing
external moisture passing through the render. Unilit bonding, undercoat and
finishes mortars where applied, in association with the Unilit 30 will ensure
the compatibility with the background, and maintain the overall plaster
performance.
Unilit 30. - Waterproofing and stabilising
undercoat layer.
A dry, premixed mineral stabilising mortar based on hydraulic, naturally pure and selected
lime. Designed particularly for situations where rising damp or capillary action is
prevalent, the mortar is characterised by a high plasticity, slow but strong bonding and a
low salt content.
Unilit 30 is applied 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 is normally applied in conjunction with other Unilit undercoat layers
for remaining areas where the damp and salts control properties of Unilit 30 are
not required, with both products being applied to the same thickness prior to
the application of a finishing coat over both to give a uniform finish.. Unilit
30 can also be applied as a pre treatment prior to applying other Unilit
undercoat layers, or where greater thickness is required as the first 15 - 20mm
render thickness in place of other Unilit undercoat layers for areas as
above.
If a finish is applied to Unilit 30 after 1 week, a bonding layer of Unilit 15/P1 or P2 is
required.
For a smooth finish a premixed finish of Unilit 65f, 45 or Unilit 40 is
required. A colour finish can then 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
within 2 or 3 days after the application of
Unilit 30.
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.
Colour:
Beige.
Packaging:
30 kg bags, in powder form.
Density:
1600 kg/m3.
Tensile strength:
0.6 N/mm2.
Compressive strength:
7 N/mm2.
Modulus of elasticity:
6130 N/mm2.
Vapour diffusion resistance:
µ= 10.
Coefficient of thermal conductivity:
0.65 W/m °K.
pH:
> 10.5.
Fire classification:
Non-flammable (M.O.)
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
Undercoats: Waterproofing and stabilising premixed natural hydraulic lime mortar.
Product reference:
Unilit 30.
Fibre reinforcement: Seek advice from Telling.
Not Required.
Thickness (excluding dubbing out): Seek advice from Telling.
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 application. 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.
Final coat: Premixed natural hydraulic lime finishing
mortar.
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.
Accessories:
Telling Brick Mesh Stainless steel mesh reinforcement
Other requirements:
Apply finishing coat within 2 or 3 days after the application of Unilit
30.
Apply a bonding layer of Unilit 15/P1 or P2 before applying finish if Unilit 30
fully dry. Alternatively, apply Unilit 65 N/M/F as finishing coat which will
adhere to fully dry Unilit 30.
