XERAL SP 028
Thermal insulating plaster
XERAL SP 028 thermal insulating plaster is a rendering mortar according to DIN EN 998-1 and plaster mortar group PII according to DIN 18550 with purely mineral lightweight aggregates and thermal conductivity group (WLG) 028. (measured according to ISO 8301).
Technology<p>The major innovation with respect to <strong>XERAL SP 028</strong> is found in the minor detail – in a previously impossible combination of perlite and silica granulate. By means of a special manufacturing process the insulating properties are able to be significantly increased. Moreover the combination is so stable that the insulating rendering is capable of mechanical application and as a result, quick and easy to work with.</p>
Technical product data sheet
- For old and new buildings
- For the exterior and interior
- On all conventional base surfaces
- Extremely good applicability for »soft« base surfaces such as vertical coring bricks, lightweight concrete, cellular concrete and lightweight exterior bricks
- Lime based thermal insulation plaster
- High insulating performance (group 028)
- Pure mineral
- Without biocides; without polystyrene
- Vapour permeable and water repellent
- Resistant to mould and algae colonization
- Capable of mechanical working
- Quick and easy to work with
|Thermal conductivity λD||0.026 W/ (m x K) (measured according to ISO 8301)|
|Binding agent||Calcium hydroxide, cement|
|Aggregates||silica granulate, perlite|
|Fire protection class||A2|
|Water vapour diffusion resistance (µ)||5|
|Water absorption coefficient w||W1|
|Dry density||approx. 200 kg/m³|
|Compressive strength||approx. 0.4 N/mm² (after sufficient carbonation)|
All technical data are characteristic values which have been determined under laboratory conditions on the basis of the applicable test standards. Deviations under practical conditions possible.
- 13 kg / bag
- 21 bags / pallet
- Bag contents: 13 kg
- Water requirement: approx. 19 l / bag
- Yield: approx. 72 l fresh mortar per bag
- 1.8 kg/sqm per 10 mm plaster thickness
- On absorbent base surfaces the base surface must be prepared all-over with XERAL PRE 01 silicate deep sealant.
- Smooth as well as nonabsorbent or low absorbent base surfaces are to be treated with XERAL COM 10 adhesive and bonding mortar as a scratch coat for improved bonding.
- Use XERAL PRE 10 pre-spraying mortar on solid brick in particular if existing plasters have been removed.
- For manual working fill the water requirement for a complete bag into a mixing bucket; intersperse the complete contents of the bag in the clean water and stir to a lump-free consistency at low speed.
- For mechanical working, technical equipment suitable for XERAL insulating plasters must be used. Please observe »Recommendations for machinery equipment for working XERAL insulating plasters«.
MINIMUM APPLICATION THICKNESS:
- The minimum coat thickness is 10 mm; on the exterior according to standard on average at least 20 mm. When using wire mesh support the minimum coat thickness can be increased in order to achieve the necessary coverage.
- From a plaster thickness of > 30 mm XERAL insulating plasters should be applied in several coats. The final coat of a built-up insulating plaster should be approx. 20 mm in order to achieve the best possible surface finish when the final coat is smoothed off. The layer thickness of an individual coat can be up to approx. 60 mm depending on the base surface and consistency of the mortar. The surfaces of individual intermediate coats are left with the spray pattern and do not need to be additionally roughened. As soon as a coat of plaster has sufficiently stiffened, which when the weather is fine can be as early as the same day, the next coat can be applied. If an intermediate coat is left longer than 3 – 4 days due to an on-site interruption of work this surface is to be roughened.
- Always spray the plastering mortar »from bottom to top« i.e. build up from bottom to top.
- The final coat is roughened all over using a suitable tool once it has sufficiently hardened.
- The working time for the fresh mortar is maximum 2 hours depending on weather conditions.
- When mechanically working, the mixing pump and hoses should be run empty and cleaned for interruptions of longer than 15 minutes.
TEMPERATURE AND WEATHER CONDITIONS:
- The freshly applied plaster is to be protected by suitable means from dewatering too quickly in the sun, in the wind and at high temperatures as well as from exposure to driving rain and the action of frost.
- High humidity and low temperatures can significantly prolong the curing period.
- Do not work when component and air temperatures are below +5°C or above + 30°C.