Cement based polymer modified base coat render for ETICS
webertherm base is a pre-bagged dry blend of cement, aggregates, polymer, and additives. It provides an excellent reinforcing coat for embedding glass fiber mesh in facade insulation system (ETICS). It is elastic, crack-proof and resistant to mechanical stress. webertherm base has an outstanding bonding effect and is water resistant. webertherm base to be applied in two coats at 3mm each coat thickness
Surface of application
Polymer modified for high bond strength. Factory batched for consistency Easy to spread
Surface must be clean and free from greasy matters or dust Use a stainless notched trowel to apply the mortar to the surface of the EPS insulation board to a uniform thickness of appr. 2 to 3 mm Immediately, lay in the meshcloth . Once the initial coat has started to ‘take-up’, apply a second layer of adhesive mortar to produce a sandwich approximately 6 mm thick totally encapsulating the meshcloth The meshcloth must lie within the outer one-third of the webertherm base. At joints, individual meshes should overlap each other by 10 to 15 cm. At corners special reinforcing corner angle glass fiber mesh is used. In order to protect against the formation of cracks, in areas where larger local stresses are to be expected, i.e. in the vicinity of the corners of door, window and other openings, strips of mesh (app.20 x 40 cm) should be placed diagonally across the corners. In case a thick mineral finish is required, lightly comb scratch the webertherm base to achieve a good mechanical key.