About this product
weber TXT mortar is designed for the sculpture or reconstruction of decorative reliefs (artificial rocks, trees, facing stones, etc.) and the casting or running of ornamental motifs in relief (cornices, bands, simulated stones, etc).
The material contains grey or white Portland cement, lime, fillers, silica sands and lightweight aggregates, thixotropic agents, water retainers, water repellents, pigment and additives.
Features and Benefits
- Factory-produced render for hand or machine application.
- Requires only the addition of clean water on site.
- weber TXT may be applied to metal lath to formwork up to 200 mm in thickness
Technical data
Preparation
The metal reinforcing lath may be fixed onto substrates of masonry, concrete, particle board or plywood intended for outdoor use. A water barrier is necessary for wooden supports.
Lath must be taut and well anchored to the substrate (15 points/m²).
Lath may also be attached to metallic studs or struts which are protected against corrosion. The lath is to be chosen and fixed in according to the work to be executed, in strict accordance with the Codes of Practice and in accordance with any special guidelines issued by the manufacturers of metal laths and mechanical fixing systems.
The calculation of the structural support must take the added weight of the render into consideration.
Mixing
weber TXT may be mixed manually in a cement mixer or in a plaster pump. The mixing time is between 3 and 5 minutes depending on the type of machine used. Mix with 5 – 5.8 litres of clean water per 25 kg bag.
Open time: The mix may be used for 1 – 2 hours depending on climatic conditions.
Application
weber TXT can be applied, onto metal lath, in thicknesses ranging up to 150 to 200 mm. It is more generally applied in thicknesses of 70 to 80 mm, including lath. Apply only in temperatures between 5 to 35°C.
In drying winds or hot weather, care must be taken to re-humidify TXT with a fine spray of clean water the day following application.
In order to avoid subtleties in colour, when using a pigmented version, it is advised not to apply the product when temperatures are below 8°C.
weber TXT applied onto metal lath attached (flush) to a wall
Scratch coat
The rendering must penetrate through the lath and completely coat both sides in order to assure a good mechanical key (trowel flatten through the lath when applying manually, the thickness after flattening should be 10-15 mm). There should be no hollow spots between lath and substrate.
Level and key the surface with a flexibletoothed render comb to a depth of approx. 7 mm.
Allow at least 24 hours between coats, depending upon weather conditions.
Undercoat
Apply approx 20 mm of material and level up the coat. If the thickness of the finish coat is to be more than 20 mm, scarify the initial coat. The depth of the key should be adequate for the finish thickness.
Allow at least 48 hours between coats.
Finish coat
The thickness of the finish coat can reach up to a maximum of 150 mm in sculptured applications. The resultant surface finish may be smoothed or float-finished, imprinted, sculptured with a trowel, spatula or knife or with any other suitable tool in order to obtain the shape and form desired. The fresh mortar may also be imprinted.
weber TXT applied onto metal lath fixed to a supporting structure
Supporting studs or struts should be spaced between 400-600 mm max. depending on load.
Scratch coat
The first coat must be between 10 – 20 mm. Key and allow to dry.
Undercoat
Apply the second coat after 24 hours approximately 20 mm thick and allow to dry for at least 48 hours.
Finish coat
The finish coat may be applied in one coat or built up in several successive layers. It can then be shaped, carved, sculptured, imprinted etc.
Additional items
It is possible to fix small, stable, lightweight items directly into the fresh mortar. (natural or artificial stones, terracotta or moulded, imprinted or gauged items made from weber TXT).
When moulding, key the back of the element to be applied to the render.
All elements to be fixed should be soaked in water and allowed to drain.
All elements to be mechanically fixed must have the necessary fixings incorporated at the casting stage.
Storage and Shelf life
Shelf life I2 months in good conditions protected from humidity.
Health and Safety
Contains cement.
Technical services
weber's Customer Services Department has a team of experienced advisors available to provide on-site advice both at the specification stage and during application. Detailed specifications can be provided for specific projects or more general works. Site visits and on-site demonstrations can be arranged on request.
Technical helpline
Tel: (01525) 722110
Fax: (01525) 718988
Sales Contact
weber products are distributed throughout the UK through selected stockists and distributors. For UK sales enquiries and overseas projects, contact Weber's Sales office.
Sales office
Tel: (01525) 722100
Fax: (01525) 718988
More Information
Packaging
weber TXT is packed in 25 kg paper sacks.
Coverage is approximately 1.6 - 1.7 kg/m2 per mm of thickness.
