Placa izolatoare monostrat din fibre lemnoase GUTEX Thermoroom
Interior Insulation
of Exterior Walls
GUTEX Thermoroom®
N AT U R A L LY M A D E F RO M W O O D
Table of Contents
A Performance-Tested Insulation System
Important Considerations
NEW: GUTEX Flankendämmkeil
Planning the Insulation of Corner Junctions
Installing the Insulation Boards
Plaster Work
Installing over Wood Structures
Installation Details
3
4
5
6
8
9
10
11
–2–
Scientifically Tested GUTEX Thermoroom Interior Insulation System
GUTEX Thermoroom possesses all the qualities necessary for
optimum interior insulation:
Introduction
Interior insulation is a consideration particularly for buildings
for which exterior insulation is not possible or ill advised due
to the historical significance or listing of the building.
✓ Insulation against the cold in winter
Thanks to its minimum thermal conductivity (λ=0.038
W/mK), it creates warmer wall and ceiling surfaces for
improved indoor comfort.
The advantages offered by interior insulation include the
absence of scaf
folding, insusceptibility of work to weather and
the possibility to retrofit buildings gradually, one space, room
or apartment at a time.
✓ Diffusion-open wood composition with a µ-value of 3
Without diminishing the quality of the interior environment
or performance of the insulation, GUTEX Thermoroom's
wood fibre construction facilitates the transfer of moisture
between the walls and interior spaces.
✓ Active capillary action
Wood fibre also is conducive to the movement of liquid
water, causing any condensation that occurs between
the original wall and interior insulation to move away
and spread throughout the board's entire cross section.
You are welcome to view the test report (U628), which is
available at www.gutex.de (Downloads->Approvals/Certificates->Test Reports).
Still another reason to install insulation on interior walls is
to raise the interior surface temperature of the walls. This
prevents condensation and subsequent mould and mildew
whilst improving the thermal co
mfort of the space. It is
especially suggested for rooms and spaces that see only intermittent use, such as holiday rental properties and apartments,
banquet halls, community centres, etc., because it allows these
spaces to reach a comfortable temperature very quickly.
Advantages offered by GUTEX Thermoroom
– Quick and easy installation via adhesion to the
substrate boarding. Mechanical fasteners are not
necessary.
– Active capillary action
– Verified optimum performance as insulation over
interior sides of exterior walls
– Superior impact resistance with higher thermal
insulation performance (thermal conductivity is 0.038
W/mK)
A delicate balance of physical factors
Interior insulation completely changes the physical character
and behaviour of exterior walls. Diffusion, capillary action,
moisture and surface temperature are all properties and
factors whose interaction must properly match and work
together to produce a properly functioning system. Aware of the
delicatenes
s of this balance, GUTEX collaborated with the
Fraunhoferinstitut in Braunschweig, Germany (WKI) to
research the complex subject of interior insulation. GUTEX
Thermoroom, GUTEX’s new insulation board, is designed to
meet the performance requirements based on the findings.
– Reduction of thermal bridging due to the uninterrupted full coverage of the insulation
– Saves energy and money thanks to protection against
heat and cold throughout the entire building element
or space.
– Also improves acoustic insulation
– Optimises the indoor environment due to its humidity
regulating function
– Wood is a sustainable, recyclable natural resource.
– Made in Germany
– Biologically safe (natureplus© certified)
–3–
Important Considerations
Existing walls & GUTEX Thermoroom
Capillary Action of
Existing Wall
Very minimum
Wood perpendicular to direction of fibre,
hydrophobized wood materials, exterior
render, several types of natural
stone
Intense
Wood with lengthwise
structure, mineral
plaster, sand-lime brick, brick masonry
Very intense
Diffusion permeability
GUTEX Thermorooms‘ diffusion capacity makes it an ideal
insulation for interior use. It absorbs moisture that occurs
as vapour in nearly every building element and distributes it
throughout its entire volume from where it dissipates in every
direction.
Plaster with synthetic resin, highly hydrophobized composite wood products and
other highly hydrophobized materials
Minimum to moderate
To ensure the building is not damaged by the retrofitting of
outer walls with interior insulation, the existing situation
and status of the building must be evaluated prior to beginning
with the planning. Key factors are diffusion permeability,
capillary action and the insulation performance of the wall
elements (U-value). Suitable action to prevent the outer wall
from becoming damp due to driving rain and rising damp must
be taken prior to beginning with refurbishment work.
Material
Non-hydrophobized
porous concrete,
brick masonry, clay
Getting started with your interior wall insulation:
1. ssessment of current status
A
• General information about the building
• Existing layers of building materials; dimensions and
surface/substrate qualities/condition
• General condition of the affected structure and the
entire building
• Dampness of the structure (susceptibility to driving rain,
other moisture issues, rising damp, etc.)
• Other negative influences on interior climate
• Thermal bridges
Regulating indoor humidity
The equilibrium moisture content of untreated wood
adjusts automatically with changes in the relative humidity and
temperature of its immediate surroundings. For example, at 23°
C and 50 % relative humidity, the moisture content is between
8-10 %. Wood fibreboard has the capability to absorb up to
20 % of its own weight in moisture and release it without
significant loss in its ability to insulate. Excess humidity
produced by cooking, shower
s, baths or washing is absorbed and
retained until the air is dryer when it is then released back
into the indoor space. This capacity is very beneficial and
produces a pleasant balanced living environment.
2. ext, determine the specific requirements of the developer
N
and applicable standards and codes, incorporating them into
the plans, including:
• Achievement of the minimum thermal insulation to
ensure the suitable hygienic quality of the space
• Improvement in the thermal insulation
• Compliance with applicable energy-efficiency standards
Capillary action of different materials
GUTEX Thermoroom may be used for existing outer walls
that exhibit little to significant capillary action in the first 2-4
cm of their interior sides. The capillary action is critical to the
distribution of moisture throughout the construction.
3. rawing up the plans
D
• Give sufficient consideration to the surface temperature
in critical areas
• Plans must give suitable
consideration to avoiding
potential thermal bridges.
• Specific design details for junctions
4. recise implementation of the plans by suitably qualified
P
tradesmen
–4–
NEW: GUTEX Flankendämmkeil
An example
The following simulated thermal images show building sections
both with and without the corner insulation wedges.
By adhering to several important principles, mould and mildew,
which occur with the presence of high humidity or low temperatures, can be easily avoided.
Corner junctions of exterior walls with
ceilings and interior walls
In Germany, the DIN 4108-2 standard for the insulation of
buildings specifies interior surface temperatures of greater
than 12.6° C to avoid condensation and thereby prevent
mould and mildew. To maintain 12.6° C across all the interior
surfaces, extra attention must be given to a building's weak
points, which are namely the corners formed by the junction
of exterior walls, interior walls and ceilings. Until recently,
interior wal
l insulation was added to the entire wall or the
thickness of the insulation increased to alleviate this problem.
Now, GUTEX offers a new corner insulation wedge, which is
an additional component for use with its Thermoroom system.
Named GUTEX Flankendämmkeil, the new product
significantly eases the work of painters, plasterers and interior
decorators. Like nearly all of GUTEX's single-ply
homogeneous insulation boards, it installs easily with GUTEX
Klebe- und Spachtelputz, an adhesive mortar. Next, various
diffusion-open plaster finishes may be applied to the boards.
The insulation wedges install on the ceiling or walls after
the interior insulation is installed, and are then plastered and
painted or covered with a suitable wall covering.
Figure 1: Junction of an exterior wall and interior wall without the
insulation wedge. The temperature in the critical area is 11.3° C -- too
cool to prevent mould and mildew.
Figure 2: Junction of an exterior wall and interior wall fitted with t
he
GUTEX Flankendämmkeil. The temperature in the corner is 15.8° C -well within the 12.6° C limit that is necessary to prevent the growth of
mould and mildew.
GUTEX Flankendämmkeil
–5–
Planning the Insulation of Corner Junctions
When is it necessary to insulate corner
Detail Innendämmung
Anschluss AW-IW
junctions?
Situation 2: Junction between masonry interior walls and
masonry exterior walls, with timber stud
The following tables will help you determine if it is necessary
to insulate corner junctions. Based on the building substance
of the structures and their respective thermal conductivity
properties, the approximate U-values of walls can be
determined using the tables below. Use the U-values for the
exterior and interior walls in the tables at the bottom of the
page to determine if corner insulation is necessary.
Junction of interior and exterior walls
U-Value of
Exterior Wall
(W/m2K)
Thermal Conductivity (W/mK) for
U-Value of
Exterior
Wall
(W/m2K)
Masonry Thicknes
s (in cm)
24
30
36
1.10
1.30
1.60
0.75
0.95
1.10
0.50
0.65
0.75
0.30
0.40
0.45
≥ 2.5
2.5 > U ≥ 2.0
2.0 > U ≥ 1.5
1.5 > U ≥ 1.0
≥ 3.5
3.5 > U ≥ 3.0
3.0 > U ≥ 2.5
2.5 > U ≥ 2.0
2.0 > U ≥ 1.5
U-Value of Interior Wall (W/m2K)
3.5 > U 3.0 > U 2.5 > U 2.0 > U
≥ 3.0
≥ 2.5
≥ 2.0
≥ 1.5
If THK* If THK* If THK*
less than less than less than
80 mm
80 mm
80 mm 100 mm 100 mm
If THK* If THK* If THK* If THK* If THK*
2.5 > U ≥ 2.0 less than less than less than less than less than
80 mm
60 mm
60 mm
80 mm
60 mm
If THK* If THK* If THK* If THK* If THK*
2.0 > U ≥ 1.5 less than less than less than less than less than
60 mm
60 mm
60 mm
60 mm
60 mm
1.5 > U ≥ 1.0 Never
Never
Never
Never
Never
≥ 2.5
Table 1
U-Value of Interior Wall (W/m2K)
≥ 3.5
Thermal Conductivity (W/mK) for
Masonry Thickness (in cm)
12
17.5
24
1.10
1.60
2.10
0.75
1.10
1.50
0.55
0.76
1.05
0.38
0.55
0.75
0.25
0.35
0.50
Detail Innendämmung
If THK* If THK*
less than less
Anschluss AW-IW than
*THK is
the abbreviation used
here for insulation thickness.
Table 4
Hinweis: Dieses Detail ist ein allgemeiner Planungsvorschlag, welcher schematisch die Ausführung eines WDVS darstellt. Anwendbarkeit und Vollständigkeit sind vom Verarbeiter/Kunden beim jeweiligen
Bauvorhaben eigenverantwortlich zu prüfen. Angrenzende Gewerke sind nur schematisch. Alle Vorgaben und Annahmen sind auf die örtlichen gegebenheiten anzupassen bzw. abzustimmen. Die jeweiligen
technischen Vorgaben in den Merkblättern und Systemzulassungen sind zu beachten.
Table 2
Detail Innendämmung
Anschluss AW-IW
Situation 1: Junction of masonry interior walls and masonry
exterior walls
U-Value of
Exterior
Wall
(W/m2K)
Situation 3: Masonry interior walls and masonry exterior walls,
with junction between 2 timber studs
U-Value of Interior Wall (W/m2K)
≥ 3.5
3.5 > U 3.0 > U 2.5 > U 2.0 > U
≥ 3.0
≥ 2.5
≥ 2.0
≥ 1.5
U-Value of
Exterior
Wall
(W/m2K)
Hinweis: Dieses Detail ist ein allgemeiner Planungsvorschlag,
the abbreviation used
here for insulation thickness.
Table 4
Hinweis: Dieses Detail ist ein allgemeiner Planungsvorschlag, welcher schematisch die Ausführung eines WDVS darstellt. Anwendbarkeit und Vollständigkeit sind vom Verarbeiter/Kunden beim jeweiligen
Bauvorhaben eigenverantwortlich zu prüfen. Angrenzende Gewerke sind nur schematisch. Alle Vorgaben und Annahmen sind auf die örtlichen gegebenheiten anzupassen bzw. abzustimmen. Die jeweiligen
technischen Vorgaben in den Merkblättern und Systemzulassungen sind zu beachten.
Table 2
Detail Innendämmung
Anschluss AW-IW
Situation 1: Junction of masonry interior walls and masonry
exterior walls
U-Value of
Exterior
Wall
(W/m2K)
Situation 3: Masonry interior walls and masonry exterior walls,
with junction between 2 timber studs
U-Value of Interior Wall (W/m2K)
≥ 3.5
3.5 > U 3.0 > U 2.5 > U 2.0 > U
≥ 3.0
≥ 2.5
≥ 2.0
≥ 1.5
U-Value of
Exterior
Wall
(W/m2K)
Hinweis: Dieses Detail ist ein allgemeiner Planungsvorschlag,
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