Application Guidline
Content
Page
1. Preliminary notes 03
1.1 Legal Bases 03
2. Substrate 04
2.1 Assessment and preparation of the substrate 04
3. HECK insulation systems at wall bases 05
3.1 Preparations – Installing wall base profiles 06
4. Adhesive bonding 07
5. Anchors 08
5.1 Anchors types 08
5.2 Mechanical fastening of HECK insulation systems 08
5.2.1 HECK MultiTherm EPS 08
5.2.2 HECK MultiTherm MW 08
5.2.3 HECK MultiTherm L-MW 09
5.3 Anchor quantity for structural mechanical fastening 09
5.4 Anchor placement and quantities 10
6. Joint sealing – Installation of accessories parts 10
7. Reinforcement of window/door jambs 11
7.1 Surface reinforcement 12
8. Final coating and surface design 14
8.1 Finishing coats, thin-layered
2
3
1. Preliminary notes
Exterior thermal insulation using Exterior Insulation Finishing Systems reduces heating expenses, is environmentally sound
and improves interior climate and living comfort. EIF systems have proven reliable and effective for more than fifty years.
To ensure the durable functionality of an insulated facade, the installation of Exterior Insulation Finishing Systems must be
planned professionally and executed with attention to detail.
This installation guide will become invalid with the publication of a new edition. With the information contained herein we
want to advice to the best of our knowledge. The notes on installation are for informational purposes only; they have to be
adjusted to actual on-site conditions.
For HECK customers: prior to planning or installing our EIF systems, a briefing on our product systems is necessary. Please
contact us for details.
1.1. Legal Bases
The usage and application of EIFS are subject to building regulations and building codes. Those may be of European Union
origin, national origin or regional or local origin and may vary. Please make sure that application and usage of an EIFS at
your specific project comply with the current regulations and codes in place and also the guidelines of the producer, which
are completely binding. In principle the applicable legal bases require application and usage of systems. Mixing and
matching of system components normally does not comply with the legal bases.
Approvals for EIFS
Within the European origin EIFS may be used only, if the general fitness for use is confirmed by an European Technical
Approval (ETA). In some countries within the EU further more specific aspects are subject to national approvals or national
application documents. Outside of the European Union depending on the country the general fitness for use may be confir-
med by a national approval.
Any of those approvals or application documents may define requirements on application that needs to be obeyed.
Specific regulations for EIFS
Beside requirements defined in approvals or application documents specific national or even regional or local regulations
exist.
Typically fire protection requirements are nationally or regionally defined. In principle mineralwool based systems provide
the best fire protection. Foam based systems typically require additional measures to improve fire protection. A well recei-
ved and accepted method is to apply a at least 200 mm firebreak from non combustible mineralwool in the thickness of
the requested insulation at every second floor level and it is recommended to use this method if no other regulation on fire
protection exist nationally regionally or locally.
As energy efficiency and CO2-reduction are important topics in most countries regulations on design of structures or
building with regards to energetic performance are in place. Those national regulations may be complemented by regional
or local regulations or incentives. It is recommended to carefully design the system and its application to the energetic
performance regulations in place.
Further national, regional or local regulations may be valid during design and application of an EIFS with regards to sound
protection, impact resistance, environmental protection, requirements on static load accommodation and maybe other is-
sues. Those regulations and requirements may change the usage or application of an EIFS as described in this application
reference guide.
4
Substrate Treatment
moisture within masonry remove cause; vertical waterproofing, horizontal waterproofing, wait until substrate has dried
salt efflorescences sweep off, brush off, renew damaged render surfaces
discontinuities, expose hollow areas and fill cavities in plasterwork
brittle, nonstructurally-sound remove affected render and refill; plasterwork alternatively, use mechanical fixing
dusty, soiled sweep off, brush off, pressure-clean
algae, fungi, moss remove, post-treat mortar ridges remove
adhesion-inhibiting residues, steam-jet clean using additional detergent; such as formwork oil remnants wash off with water afterwards
chalking or sanding plasterwork clean and prime using stabilising primer
chalking paint coat brush off, clean and prime using stabilising primer
chipping paint coat remove; alternatively, use mechanical fixing for EIFS
highly absorbent, clean and prime non-alkali-resistant
unevennesses level with render (CS II / CS III / MG P II; curing time 1 day/mm minimum)
unknown substrates test adhesive properties and structural soundness; prime if necessary
2.1. Assessment and preparation of the substrate2. Substrate
5
3. HECK insulation systems at wall bases
Wall base flush with wall Setback wall base
1 wall construction material 2 building insulation in accordance with DIN 18195 (during construction) 3 HECK adhesive 4 HECK insulation board 5 HECK base coat 6 HECK finishing coat 7 Rajasil 2K DB or Rajasil DS FLEX 8 HECK EPS perimeter board 30-035, bevelled on-site 9 HECK system anchors; exact type depending on application10 HECK finishing coat for use on wall bases, e.g. HECK K+A; smooth-finished with felt or sponge float11 Rajasil SHF, two-coat application 12 Rajasil DS FLEX or, alternatively, Rajasil 2K DB for waterproofing the render system13 protective layer in accordance with DIN 18 145, e.g. dimpled sheet
1 wall construction material 2 building insulation in accordance with DIN 18195 (during construction) 3 HECK hammer-in anchor 4 HECK wall base profil 5 HECK adhesive 6 HECK insulation board 7 HECK base coat 8 HECK finishing coat 9 HECK Fugendichtband 2D (sealing tape)10 Rajasil 2K DB or Rajasil DD FLEX11 HECK EPS perimeter board 30-035 12 HECK system anchors; exact type depending on application13 HECK base coat (suitable for wall bases)14 finishing coat for use on wall bases, e.g. HECK K+A; smooth-finished with felt or sponge float15 Rajasil SHF, two-coat application16 Rajasil DS FLEX or, alternatively, Rajasil 2K DB for waterproofing the render system17 protective layer in accordance with DIN 18 145, e.g. dimpled sheet18 certified perimeter insulation board (during construction)
6
• installusingapprox.3HECK
hammer-in anchors/m
• levelunevennesseswithHECK
distance pieces
• createtransitionsusingHECK
wall base profile connector
• payattentiontoexpansion-joint
gap between profiles
• mitrecorners
Execution with wall base profile (recommended when wall bases ARE NOT insulated):
HECK special wall base solution (recommended when wall bases ARE insulated)
Tip:
Designs with mounted drip-edge
profiles are virtually free of thermal
bridges.
HECK wall base solution W 65
HECK mounting angle Z 16
HECK corner connection Z 15
insulation material
thickness ______ mm
HECK wall base profile Alu
HECK wall base profile V2A
HECK wall base profile
connector
HECK hammer-in anchors
HECK distance pieces
3.1. Preparations – Installing wall base profiles
7
4. Adhesive bonding
Ribbon-and-dab method; effective
adhesive bonding surface > 40%
Manual adhesive application
to entire surface
Partial-area bonding (effective
adhesive bonding surface > 60%;
application possible with EPS here)
Coverage:
•ribbon-and-dabmethod:approx.4kg/m²
•adhesiveapplicationtoentiresurface:
approx. 8 kg/m²
•partial-areabonding:approx.6kg/m²
minimum thickness 1.0 cm
Interlock corner boards for more stable compound.
With normal-sized window jambs the facade boards will extent into the opening,
so that the insulation material strip for the window jamb can installed without
creating thermal bridges.
Notch insulation boards at the corner of window openings.
8
5.1. Anchors types5. Anchors
Constructural anchors Load bearing anchors
hammer set anchors HECK SDK-FV HECK SD-FV
HECK NTK-U
anchors HECK SX-FV S HECK SX-FV U
anchors with screw HECK STR-H HECK STR-U
HECK hammer-in set anchors NTK-U HECK screw-in anchors STR-U
For notes on
anchor place-
ment, please
refer to our
Installation
Guidelines.
structurally sound substrate with or without
equalising render layer
5.2. Mechanical fastening of HECK insulation systems5.2.1. HECK MultiTherm EPS
non-structurally-sound
substrate
(unevennesses < 2 cm)
substrates without
existing render or paint
coat layer
(unevennesses < 1 cm)
existing structurally sound render
layer without paint coating
(unevennesses < 1 cm)
no mechanical
fastening up to the
application limit
wooden boards or
similar
recommendation:
structural mechanical fastening;
at least 4 – 6 pcs/m2 on the insulation boards
(in all T-joints)
load bearing anchors
with certified anchors according
to table (see 5.3.)
all substrates (unevennesses < 2 cm)
load bearing anchors with certified anchors
according to table (see 5.3.)
HECK MW 040 (Type HD) and HECK MW 035 (Type WV) with HECK anchor plate 90.
5.2.2. HECK MultiTherm MW
9
5.2.3. HECK MultiTherm L-MW
structurally sound substrate with or without
equalising render layer
non-structurally-sound
substrate
(unevennesses < 2 cm)
substrates without
existing render or paint
coat layer
(unevennesses < 1 cm)
existing structurally sound render
layer without paint coating
(unevennesses < 1 cm)
no mechanical
fastening with building
heights of up to 20 m
above 20 m, up to
100 m: mechanical
fastening with certified
anchors alongside edges
wooden boards or
similar
recommendation:
structural mechanical fastening;
at least 4 – 6 pcs/m2 on the insulation boards*
load bearing anchors
with certified anchors according
to table (see 5.3.)
* HECK MW Lamelle 040 (Type HD) with anchor plate 140.
5.3. Anchor quantity for structural mechanical fastening
The following table lists our recommendations for statically relevant mechanical fixing. However, national/regional regulation
must be adhered to at all time.
For higher buildings or higher wind loads please seek professional advice.
Height of building above ground level [m] up to 25 mup to 18 mup to 10 m
Wind zone and location Wind suction and anchor quantity per m2
0.738
6
0.959
8
1.18
8
1.106
8
1.328
10
1.623
12
0.959
8
1.18
8
1.328
10
very low
wind load
low
wind load
medium
wind load
constructional anchors 4 – 64 – 64 – 6
wind load [kN/m2]
anchors
wind load [kN/m2]
anchors
wind load [kN/m2]
anchors
load bearing anchors
10
1. EPS and MW boards, 4, 6, 8,10 and 12 anchors/m2, respectively
2. MW-Lamelle: 4 anchors/m2 on the surface, 8 anchors/m2 along the edge of the board
1
2
dR
a
5.4 Anchor placement and quantities
6. Joint sealing – Installation of accessories parts
Apu beads:
HECK corner beads with mesh
for THIN-LAYER systemsCorner beads:
HECK edge profile PVC with mesh reinforce all corners additionally
4 anchors 6 anchors 8 anchors 10 anchors 12 anchors
for THIN-LAYER systemsWindow/door jamb details:
joint sealing tape + pointing / elastic joint tape joint sealing tape + Apu bead
Seal the system properly to all adjoining structures
11
For jamb reinforcement, HECK edge profile PVC with mesh is recommended. You
can proceed like this: Start with the lintel angle bead. Make a 10 cm incision on both
the left and right end of the bead and remove the corner reinforcement there (1).
The angle beads at the vertical jambs are butt-jointed to the inner corner. There will
then be the required overlap at the junction/intersection with the window lintel.
HECK mesh (mesh sheet) is then butt-jointed to the window jamb edges. If possible,
avoid overlaps at corners, because this may lead to a (potentially visible) increase in
thickness of the render layer (3).
Then, apply diagonal mesh strips (20x30 cm) to all corners.
With this, make sure the first thread of the diagonal mesh runs through the corner
(4). The diagonal strip may also be installed together with the mesh sheet (after
completion of the work step shown in fig. 3).
In this case, the mesh strip is embedded directly on the mesh sheet and then thinly
covered with the second compound layer.
7. Reinforcement of window/door jambs
Window sill and jambs Building expanding joints have to be build into the system
12
Work steps 1 and 2 can be executed in a simplified manner, if a pre-made lintel
corner bead is used. The HECK edge profile to be installed horizontally and verti-
cally are to be jointed with a 10 cm overlap.
7.1. Surface reinforcement
In general, make sure there is sufficient overlap (10 cm
minimum) of HECK mesh at joints and connections. The
mesh has to be embedded into the upper third of the base
coat at all times. Depending on requirements as to impact
resistance and sonic properties of the EIFS, thin-layer or
thick-layer execution of the base coat is possible.
Fig. 1
Thick-layer reinforcement
Apply the first layer of HECK K+A (base coat mortar) in
approx. 4 mm layer thickness onto the insulation boards.
Then, embed HECK mesh into fresh mortar and apply a
second layer of HECK K+A (thickness approx. 3 mm) fresh-
in-fresh. Thick-layer base coat is required when thick-layer
finishing coats are to be applied, e.g. HECK Edelputz WD
(HECK EP WD) or Kratzputz (scraped finish); it may also be
necessary when there are increased demands in terms of
noise insulation or resistance to algae infestation.
Fig. 3
Thin-layer reinforcement (figs. 1 + 2)
HECK K+A base coat mortar is to be applied immediate-
ly in the final layer thickness of e.g. 4 to 6 cm (approved
thicknesses according to Technical Data Sheet). If HECK
K+A ZF is used, the layer thickness is approx. 3 mm. Then,
embed HECK mesh while mortar/reinforcement compound
is still fresh. The mesh has to be completely covered with
the compound; if necessary, trowel on another 1 to 2 mm
layer as shown in fig. 3. The application of another layer of
the compound is also necessary in cases where the diagonal
reinforcement is placed on the mesh sheet. Fig. 2
13
If the application of a thick-layer finishing coat, e.g. HECK
Edelputz WD (HECK EP WD) or Kratzputz (scraped finish) is
planned, horizontally key the fresh base coat in a wave-like
pattern using a road sweeper without exposing the mesh.
Keying should be done when the sinter skin (shiny layer)
forming on the compound is being opened/broken.
Fig. 5
Fig. 6
If the base coat work has to be interrupted, create a
“contact surface” by forcefully trowelling up the fresh
reinforcement mortar atop the mesh in a 10+ cm wide strip
at the fringe. On recommencing work, the required overlap
can then be created here, without generating uneven-
nesses, using reinforcement mortar and mesh.
Coverage:
approx 1.2 kg dry mortar/m² per 1 mm of layer
thickness
Coverage:
approx. 1.2 m²/m² HECK mesh
For the application of thin-layer finishing coats, e.g. HECK
Strukturputz (HECK STR) types KC or R), trowel up the
surface of the reinforcement layer evenly
(fig. 4).
With finishing coats of a very fine-grained texture especially,
it is recommended to smooth trowel tracks after the mortar
has set.
Fig. 4
14
8. Final coating and surface design
A large number of coatings can be used on HECK insulation systems, providing virtually limitless possibilities for the plan-
ning and designing of facades. Apart from numerous finishing coats with mineral or organic binders, HECK also provides
facade profiles for the aesthetic enhancement of facades. Through the use of brick slips it is also possible to create a facing
brick facade design.
thin-layer final coatings thick-layer final coatings
mineral textured renders (thin-layered) mineral textured renders (thick-layered)
silicate renders ceramic claddings
silicon resin renders
synthetic resin renders
coloured renders
facade profiles
As a matter of principle, render works may not be conducted if wall surface or air temperatures are below +5 °C. After ap-
plication, wall surfaces and ambient air must be frost-free for at least 48 hours.
The luminosity of finishing coats on EIF systems must not fall below the value of 20 (100 = white; 0 = black). Exceptions are
possible in individual cases, depending on situation of the object, its surface structure, surface design and surface area, as
well as render texture and binding agents. Please request professional advice.
8.1. Finishing coats, thin-layeredLime-cement finishing coats
– HECK Strukturputz (HECK STR), scraped finish and float finish variants
– HECK Edel-Dekor (HECK ED) (scraped finish and float finish variants)
– HECK ED WP (HECK ED WP), felt board/sponge board finished as well as textured; for whole-area application as
well as for decorative framings of window jambs, etc.
– HECK K+A (felt board/sponge board finished, at wall bases, and for smaller surfaces such as window jambs)
Silicate renders
– HECK Silikatputz (HECK SIP), scraped finish and float finish variants
Silicon resin renders
– HECK Siliconharzputz (HECK SHP), scraped finish and float finish variants; finishing coat for HECK EPS-EIFS
Synthetic resin renders
– HECK Kunstharzputz (HECK KHP), scraped finish and float finish variants; finishing coat for HECK EPS-EIFS
The method for texturing of the finishing coat, using e.g. a plastic trowel or a
sponge rubber float, depends on the render type.
In order to prevent differences in texture and colour, always work with the
movement of the sun and ensure that a sufficient number of applicators is
working at the same time.
With coloured mineral- or silicate-based finishing coats, a heterogeneous
colour effect is possible, depending on weather conditions and application
method. This is not a deficiency of the product. The facade can be given
a homogeneous appearance by coating it with an equalising paint coat
(e.g. Rajasil SHF) after the finishing coat has hardened.
Depending on where the building is situated, e.g. in wet lowlands, infesta-
tions with micro-organisms such as algae can occur. Please request prior
professional advice on suitable measures, such as algaecidal and fungicidal
protective coatings.
Due to the usage of mineral raw materials, follow-up deliveries may vary in
colour shade. In order to avoid follow-up shipments, make sure to order suffi-
cient quantities of the material.
Allow for sufficient drying time prior to the application of additional coatings/
renders.
Depending on the substrate and the finishing coat to be applied, roller-appli-
cation of HECK UG onto the dried base coat may be necessary. Please refer
to the Technical Data Sheets of the products in question. For float finish ren-
ders we always recommend applying a primer with a colour tone identical to
that of the finishing coat to prevent shining through of the reinforcement layer.
Allow at least one day of drying-time for the primer; then, using a stainless-
steel trowel, apply the finishing coat and trowel up in grain-size layer thick-
ness.
Coverage:
ca. 0.2-0.3 l/m²
15
03/2014
a company
HECK
RajasilMasonry restoration - sealing and injection, brick linings, jointings,renovation render systems
Stonework restoration, internal coating, lime renders, ecologicallysound systems
Facade coating - substrate preparation, renders and mortars, renderreinforcement, coating, waterproofing
Exterior Insulation Finishing Systems - mineral, synthetic resin bonded
Interior insulation systems - interior insulation board,
insulation render
Insulation render systems, primers, decorative renders, coatings
CoRaMix - paint and render mix technologies for constructionmaterial suppliers
Intelligent solutionsfor the building practice
HECK Wall SystemsGmbH & Co. KG
Thölauer Straße 2595615 Marktredwitz Germany
phone: +49 9231 802-0fax: +49 9231 802-330
www.wall-systems.com
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