Dryvit’s Fedderlite is a prefabricated external wall insulation (EWI) offering fast track installation for use on either new construction or refurbishment projects. Like site applied Outsulation® this prefabricated system is based on a simple premise – insulation is more effective when placed on the exterior of a building. By bringing insulation to the outside of external walls, this prefabricated panelized EWI eliminates thermal bridges; stabilizes interior environments; minimizes thermal shock; and builds upon the proven weatherability of Outsulation.


  • Fast track. The panel system enables rapid installation unhindered by environmental conditions that would normally affect traditional building methods. Panels can be installed from mast climbers or mobile towers, reducing access time and cost.
  • Design freedom. The system can be installed over a variety of substrates. Expanded polystyrene (EPS) insulation is lightweight and can be cut or grooved to various shapes and surface patterns.
  • Energy efficiency. Fedderlite enables new or existing buildings to meet strict energy efficiency requirements. Heating or cooling costs are demonstrably lower in lieu of other exterior materials.
  • Lightweight. Panels weigh less than brick, stone or precast concrete thus they limit imposed loading on existing and new build structures. Despite their lightweight nature the panels are capable of withstanding critical wind and structural loads.
  • Versatile. Dimensional adjustments can be made easily and inexpensively right up to panel assembly time. Of great advantage in retrofit or new build projects.
  • Weatherability. Dryvit systems are formulated to provide the utmost in weather protection providing a resilient barrier against the elements.
  • Durability. The combination of system components provides unsurpassed long-term durability meeting design requirements for use in virtually any location.
  • Aesthetics. Dryvit finishes are available in a wide array of textures in both standard and custom colours. Speciality finishes enable designers to replicate a variety of real stone or brick finishes from limestone to granite at a fraction of the cost.
  • Cost effective. Fedderlite is adaptable to complex project details. Installation is rapid, and routine maintenance is minimal.
  • Testing. Independently certified by international test bodies. Dryvit manufacturing plants are ISO 9001: 2000 certified, demonstrating the highest standards of quality and consistency.

General information



Acrylic textured finish.

Uniclass 2015

Ss_25_45_72_02 Adhesive-fixed external wall insulation systemsPrimary


M21/20 External wall insulation system

M21/210 External wall insulation system

Specification data - Adhesive-fixed external wall insulation systems

Product Reference


Support rails

Not required




Acrylic textured finish.



Quarzputz 2 mm aggregate

Sandblast 1 mm aggregate

Sandpebble 1.5 mm aggregate

Sandpebble fine 1 mm aggregate


Refer to standard colour range for details and insert requirements.

Fire barrier

Not required

Mineral wool lamella

High performance mineral wool lamella for receiving Dryvit base coats and finishes.


Not required


Extensive range available, consult manufacturer for details.

Standard product features


  • Type: Expanded polystyrene boards (EPS) grade 70E.
  • Method of fixing: Dryhesive™ Plus adhesive and/ or mechanical fixings in accordance with manufacturer's recommendations.


Standard Plus – Glass Fibre. Panzer 20 and standard plus mesh to areas subject to high impact.

Detailing mesh:

Dryvit detail mesh suitable for back wrapping EWI at termination details, forming reveals, masking Fire barriers prior to placing general reinforcing mesh, forming groove details.

Render base coat:



PMRB: Aggregate textured 100% acrylic-based proven mildew (PMR) and dirt pick resistance (DPR) finish.

Beads/ trims:

Support angles to rear perimeter of panels and corner bead with mesh to exterior where required.

Product Options


Consult with Dryvit for details of preparation to suit project substrate. Use fungicidal wash by system manufacturer. If required, specify in 'Structural substrate' clause.

Support rails:

Dryvit Outsulation Rail System – Metal Z and spring clip profiles to manufacturers standard dimensions.

Fire barrier:

Position fire barriers in accordance with Building Control Officers requirements. Barriers to be adhesively fixed with Dryvit Detail Mesh.

Third party certifications

  • Certificate: 98/3548 and LPCB No.784 a and b.

Similar products from Dryvit – a brand of CPG UK Ltd