The Study ofEIFS (Exterior insulation finishing system)
ByKandarp Bajaj, Aman Rohilla,
Enrollment no. A13567214036/35
Report submitted for the fulfilment of the requirement for the
course PROJECT LAB AND FIELD WORK - II : BUILT ENVIRONMENT &
CONSTRUCTION
Certificate
This is to guarantee that the report entitled
"____________________________" is a bonafide record of the work did
by __________________, in fractional satisfaction of the necessity
of the course ___________. He has worked under my watch and
direction in the _________________ and has satisfied the
necessities for the accommodation of his report.
The substance of this report have not been submitted to some
extent or full to whatever other University or Institute for the
grant of any degree or recognition.
Nihar Nanyam Assistant Professor RICS School of Built
Environment Amity University Uttar Pradesh - DATE : -
Declaration
We, Kandarp Bajaj, Aman Rohilla thus pronounce that this venture
report entitled "The Study of EIFS (Exterior insulation finishing
system) ", presented by us, under the direction of VPSNihar Nanyam,
RICSSchool of Built Environment, Amity University, Noida is ours
and have not been submitted to some other University or Institute
or disseminated former.
Kandarp BajajAman Rohilla
Date: ___________
Acknowledgement:
I have taken thoughts in this endeavor. In any case, it would
not have been possible without the kind help and help of various
individuals. I may need to increase my actual on account of each
one of them. I am exceptionally obliged to VPS Nihar Nanyam for his
heading and consistent supervision and also for giving essential
information as for the assignment & similarly for his
sponsorship in completing the endeavor. I may need to express my
gratefulness towards my gatekeepers & a piece of my social
occasion for their kind co-operation and bolster which help me in
fulfillment of this endeavor. My thankful and thanks moreover go to
my accomplice in making the endeavor and people who have
enthusiastically safeguarded me out with their abilities.
Kandarp BajajAman Rohilla
APRIL 2015
Table of ContentsSerial No.TOPICPage no.
1Certificate2
2Declaration3
3Acknowledgement4
4
4.1) 4.2) 4.3) 4.4) 4.5) 4.6) 4.7)EIFS Report (By Kandarp
Bajaj)
IntroductionHistoryEstablishmentStructure and types of EIFSLegal
IssuesFeatures and BenefitsMaintenance6 6 7 8 9 12 13 14
5
5.1) 5.2) 5.3) 5.4) 5.5) 5.6) 5.7) 5.8) 5.9) 5.10) 5.11) 5.12)
5.13) 5.14)Cavity Walls Report (By Aman Rohilla)
HistoryIntroductionMethodologyWorkmanshipKeeping the cavity
cleanToolingWeep HolesTie PlacementsProtection of
wallsDesciptionTiesShapes of cavity wallsAdvantagesConclusion15
15 16 17 18 19 22 23 24 26 27 28 29 30 31
6ReFerences32
INTRODUCTION
EIFS i.e. Exterior insulation finishing system is a non-load
bearing building cladding frameworks that gives outside dividers a
protected and water safe completed surface in a coordinated
composite material framework.
It has been being used subsequent to 1960 in North America. It
offers brilliant protection, design points of interest, strength
and low support. As we have seen in past, numerous a times water
invasion issues have created harm to structures bringing about
excessive legitimate cases. To forestall such disasters suggestion
of such frameworks is given which incorporate a waste plane to let
water empty disheartened out of behind the cladding.
HISTORY
EIFS was created in Europe after World War II and was at first
used to retrofit workmanship dividers. EIFS began to be utilized as
a part of North America in the 1960s, and got to be extremely
prominent in the mid- 1970s because of the oil ban and the
resultant surge in enthusiasm for high vitality productivity
divider frameworks, for example, EIFS gives. The utilization of
EIFS over stud-and-sheathing surrounding rather than over strong
dividers is a system utilized principally as a part of North
America. EIFS is presently utilized all over North America,
furthermore in numerous different ranges as far and wide as
possible, particularly in Europe and the Pacific Rim. The EIFS
business has reliably kept up that the EIFS itself was not
spilling, yet rather poor craftsmanship and awful design itemizing
at the border of the EIFS was what was bringing on the issues. The
construction laws responded by commanding EIFS with a waste
framework on wood outline structures and extra on location
assessment.
ESTABLISHMENT
EIFS id commonly joined to the outside face of dividers with a
glue or mechanical clasp. Glues are normally used to join EIFS to
gypsum board/ concrete board or solid substrates. EIFS is joined
with mechanical latches when introduced over housewraps. The
supporting divider surface ought to be persistent and level.
STRUCTURE AND TYPES OF EIFS
Sorts of EIFS are typically characterized on the premise of
there material and the presence/unlucky deficiency of a seepage
plane. The EIMA i.e. EIFS Industry Manufacturers Association
characterizes 2 classes of EIFS: 1) Class PB (Polymer Based); 2)
Class PM (Polymer Modified).
1.PB EIFS is the most widely recognized sort in north America
and generally utilized extended polystyrene(EPS) protection held
fast to the substrate with fiberglass cross section implanted in an
ostensible 1/16 crawl (1.6mm) base layer which can get extra layers
of lattice and base cover for stronger effect resistance.
2.PM EIFS utilization expelled polystyrene insulation(XEPS) and
a thick cementitious base cover connected over mechanically
appended glass fiber strengthening cross section. The framework has
joints like customary stucco. PM EIFS have developed to incorporate
diverse protection materials and base covers.
The most widely recognized sort of EIFS utilized today is the
framework that incorporates a seepage hole, which permits all
dampness to leave the divider. EIFS with waste regularly comprises
of the accompanying:
WRB i.e. water-resistive boundary that covers the substrate.
A waste plane between the WRB and the protection prepare to
leave that is most regularly accomplished with vertical strips of
cement connected over the WRB.
Insulation board regularly made of extended polystyrene(EPS)
which is secured with a cement or mechanically to the
substrate.
Glass fiber fortifying lattice inserted in the base cover.
A water safe base cover that is connected on top of the
protection to serve as a climate boundary.
A completion cover that ordinarily utilizes colorfast and break
safe acrylic co-polymer innovation.
In case an EIFS with Drainage, or water-supervised EIFS is
presented, a water resistive obstacle (overall known as a WRB) is
at first presented over the substrate (generally glass stood up to
outside assessment gypsum sheathing, centered strand board (OSB) or
plywood).[citation needed] The sogginess deterrent is joined with
the entire divider surface with a traverse joints and a liquid
associated film or a protective wrap like tyvek or felt paper. By
then a drainage depression is made (ordinarily by including a space
between the foam and the WRB). By then the other 3 layers,
delineated above, are incorporated. This kind of EIFS is required
by various building regulations districts on wood layout
improvement, and is relied upon to give an approach to incidental
water that may get behind the EIFS with a safe course back to the
outside. The article is to piece water from hurting the supporting
divider.
Concretes and fulfillments are water-based, and therefore must
be presented at temperatures well above setting. Two sorts of bonds
are used with EIFS: those that contain Portland bond
("cementitious"), or don't have any Portland concrete
("cementless"). Bonds that contain Portland cement set by the
creation reaction of the bond with water. Pastes and fruitions that
are cementless cement by the vanishing of water. Bonds come in two
structures: The most broadly perceived is in a plastic container as
a paste, to which Portland bond is incorporated and as dry powders
in sacks, to which water is incorporated. Fulfillments touch base
in a plastic container, arranged to utilize, like paint. EIFS
assurance comes in individual pieces, when in doubt 2' x 4', in
broad sacks. The pieces are trimmed to fit the divider at the
advancement site.
LEGAL ISSUES
EIFS frameworks have been the subject of a few claims, generally
identified with the establishment methodology and disappointment of
the framework creating dampness developments and consequent mold
development. The most striking case concerned the previous San
Martin, California courthouse. This case was settled for 12 million
dollars.
The fundamental basic issue behind EIFS case was that EIFS was
showcased as a savvy trade for stucco. Stucco is lavish to
introduce on the grounds that it must be precisely connected by
gifted specialists and takes a month to cure between layers.
General builders changed to EIFS on the grounds that it should be
anything but difficult to introduce with incompetent or
semi-talented work and would not break like conventional stucco
will in the event that it is not cured appropriately. Despite the
fact that EIFS if appropriately introduced by maker's headings
ought not have water interruption issues, numerous GCs reduce
quality to increase throughput by utilizing inadequately prepared
work furthermore neglected to sufficiently oversee their work.
Thus, a great many EIFS establishments were resistant and endured
extreme water interruption and form therefore. While the EIFS
business has reliably attempted to move the fault to GCs, the
development business has countered that utilizing proficient
unionized understudies woodworkers as a part of turn wipes out the
expense point of interest of EIFS over stucco, and that the EIFS
business ought to have expected this issue and designed its items
from the earliest starting point to be introduced by untalented
work or semi-talented work (that is, it ought to have been a
deficiency tolerant configuration).
FEATURES AND BENEFITS
The developing notoriety of EIFS is because of the way that few,
if any, aggressive materials offer such an extensive variety of
alluring item advantages. Boss among these are unrivaled vitality
proficiency and basically boundless configuration adaptability.
Vitality Efficiency In the event that you've ever felt the solace
of being wrapped in a warm cover on a cool winter night, you have
some thought of what EIFS can accomplish for a home or building.
EIFS truly wrap the outside in a vitality effective warm cover. By
protecting outside the structure, EIFS lessen air invasion, balance
out the inside environment and decrease vitality utilization.
Outside Insulation and Finish Systems (EIFS) utilized on a
Commercial Building By difference, conventional "between-the-studs"
protection, regardless of how thick, leaves "warm breaks" -
crevices where warmth and frosty pass all the more unreservedly
between the outside and the space inside - at studs, divider
outlets, divider joints, and somewhere else. Indeed, EIFS can
decrease air invasion by as much as 55% contrasted with standard
block or wood development. Furthermore, since dividers are one of
the best ranges of warmth and cooling misfortune, change in the
divider protection can be extremely significant regarding vitality
preservation. Likewise, EIFS add to the "R-quality" of a home or
building. Plan Flexibility The rich appearance of EIFS looks
somewhat like stucco or stone, however the frameworks are much more
flexible than these and different materials. Not just do EIFS come
in for all intents and purposes boundless hues and a wide mixed bag
of surfaces, however they likewise can be formed into practically
any shape or configuration. Outside Insulation and Finish Systems
(EIFS) utilized on a Commercial Building With EIFS, gifted
instruments can make a wide range of outside design specifying that
would regularly be cost-restrictive utilizing routine development -
cornices, curves, sections, cornerstones, foundations, uncommon
moldings and embellishing stresses are yet a couple of samples.
MAINTENANCE
Dissimilar to wood, stucco and other siding materials, EIFS once
in a while need painting. Most EIFS frameworks are exceptionally
detailed with 100% acrylic cover, which gives EIFS better
resistance than blurring, chalking and yellowing. Thus, the
frameworks have a tendency to keep up their unique appearance after
some time. EIFS additionally have incredible imperviousness to
earth, mold and mold, which helps keep the building outside looking
clean and crisply painted. The frameworks are intended to be
extremely adaptable, which makes them very split safe. At the point
when dividers grow or contract because of rising or falling
temperatures, EIFS are sufficiently flexible to "assimilate"
building development and in this manner maintain a strategic
distance from the unattractive breaking issues that are so normal
with stucco, cement and block outsides. EIFS are among the most
water safe outside surfaces you can put on a house. Be that as it
may as with all claddings, EIFS must be effectively introduced and
appropriately point by point in the event that they are to perform
legitimately. Water interruption is at times an issue on business
structures with EIFS. Water interruption harm to homes is
phenomenal, yet when it does happen, the dampness commonly
influences just little territories which can be effectively and
economically repaired. In situations where homes have been harmed,
the issues have been followed to the utilization of low quality
(even cracked and/or non code-agreeable) windows and/or despicable
blazing and fixing. Occasional support ought to incorporate careful
checking of the blazing and fixing to guarantee that the building
envelope stays watertight.
Cavity wall
A typical cavity wall.HistoryThe run of the mill depression
divider technique for development was presented in Northwest Europe
amid the 19th century and increased far reaching utilization from
the 1920s. In some early samples stones were utilized to tie the
two leaves of the depression divider together. At first depression
widths were greatly restricted and were principally actualized to
keep the section of dampness into the inside of the building. The
broad presentation of protection into the pit started in the 1970s
with it getting to be necessary in building regulations amid the
1990s.
INTRODUCTION The term cavity wall is applied to a type of
masonry wall construction in which a continuous air space or cavity
is provided inside the wall .A cavity wall therefore is really two
dividers differentiated by an air space, yet joined by method for
metal ties for auxiliary quality. They are widely utilized as a
part of European nations, especially Great Britain, where they have
been produced as a method for acquiring assurance from infiltration
of rainthrough stone work dividers. Lately in North America
numerous imperative structures have been built with hole
dividers.
METHODOLOGYIn the development of a hole divider there are no
progressions needed in fundamental bricklaying strategies, just
alterations of practices ordinarily utilized as a part of the
development of any block workmanship divider. The major guideline
in a depression divider is that there should be no scaffold of
strong material fit for conveying water over the base 2-in. (50-mm)
cavity space.
WORKMANSHIPThe significance of the workmanship utilized as a
part of building stone work has been focused by numerous,
occasionally to the point that it may create the impression that
workmanship alone is in charge of the execution of workmanship
dividers, paying little heed to the divider outline, enumerating,
or the materials utilized. While this is in no way, shape or form
genuine, great workmanship is a vital figure the development of
superior brick work.
KEEPING THE CAVITY CLEANIt is crucial that the hole be kept
clean of mortar droppings and other outside materials. On the off
chance that mortar falls into the hole, it may shape "spans" for
dampness entry, or it may tumble to the glimmering, hindering the
sob gaps. Through the years numerous routines have been produced
and impressive time and discourse have been given to the correct
system to use in keeping the cavity clean. One technique is to take
a wooden or metal strip, somewhat littler than the cavity width,
and spot it noticeable all around space. This strip lays on the
divider ties as the divider is fabricated. Wire or rope is joined
to the strip. At that point, as the block artisan manufactures the
divider, this strip is effectively lifted out. Before the following
column of ties is set, any mortar, which may have fallen into the
cavity, is evacuated (Figure 1).
Notwithstanding the aforementioned techniques for cleaning the
depression, the block artisan can utilize strategies that, if
legitimately connected, ought to wipe out a lot of mortar falling
into the pit in any case (Figures 2 through 7).
In the wake of spreading the mortar bed, the block bricklayer
ought to slant the hole edge with the level of the trowel (Figure
2). At the point when mortar is spreading this way, almost no will
be pressed out of the bed joints into the depression when the units
are laid (Figure 3). The block units are next moved into spot,
keeping the majority of the mortar all things considered (Figures
4, 5 and 6). After the block bricklayer has put the unit on the bed
joint any mortar balances projecting into the pit ought to be
straightened over the backs of the unit, not cut off (Figure 7).
This keeps the mortar from falling into the cavity and gives a
smooth surface, which won't meddle with protection materials, which
may be put in the hole.
TOOLING
Climate snugness and textural impact are the essential
contemplations of mortar joint completion determination and
execution. Legitimately "striking" or "tooling" the joint helps the
mortar and block units bond together and seal the divider against
dampness. Nine regular joint completions are indicated in Figure 8
in place of their diminishing climate snugness. Pressure of the
mortar makes the inward, V, and grapevine joints the most climate
tight and worthy to utilize. There mining six joint sorts are not
suggested for outside utilization. All gaps in the mortar joints
ought to be filled. Joints ought to be tooled when the mortar is
"thumbprint" hard.
WEEP HOLESSob gaps must be set at the base of the cavity and at
all other blazing levels. They give method for depleting without
end any dampness that may have thought that it some way or another
into the hole. Sob gaps must give an unmistakable access to the
depression and must be set straightforwardly on the blazing for
legitimate waste. Sob openings can be effortlessly made or
introduced by different routines. In place of viability these
are:
Disposing of every second or third head joint. Embeddings oiled
bars, rope or sticks in the head joint at a most extreme of 16-in.
(410-mm) and evacuating before last arrangement of the mortar.
Setting metal or plastic tubing in the head joint at greatest of
16-in. (410-mm). Setting scarf line or other suitable wicking
material in the head joint at a greatest of 16-in. (410-mm).
TIE PLACEMENTIn a legitimately developed pit divider, both Wythe
of brick work must be satisfactorily and appropriately entwined.
The principle concern to the planner is affirmation that the
majority of the ties are set up and stay agent, immovably installed
in and clung to the mortar. To attain to this, the two Wythe of the
depression must be laid with totally filled bed joints, and the
ties must be in the right position so that later unsettling
influence of the divider get together is pointless. There exists
broad information demonstrating that divider ties have incredible
tying limit in the event that they are very much inserted in the
workmanship, furthermore that the depression divider is a feeble
basic part if couple of working ties must carry out the employment
of numerous (Figure 9).
From an execution point of view, the most essential components
for divider ties are: Being erosion safe. Putting ties at fitting
separating. One half for ties with dribbles ought to lessen
dividing of ties. Pleating of the metal binds to shape a dribble is
redundant, and will diminish the quality of the tie. Full sheet
material of the bed joint and putting the divider tie in the mortar
5/8 in. (16 mm) from either edge of the block
PROTECTION OF WALLSBrick work dividers presented to climate and
unprotected amid development can gets to be soaked with water that
they may oblige weeks, or even months (contingent on climatic
conditions), to dry out. This delayed immersion may bring about
large portions of the somewhat solvent salts to go into
arrangement, accordingly raising the likelihood of blossoming. Such
conditions might likewise add to the sullying of the stone work
with dissolvable salts from somewhere else in the development
(solid, solid piece, mortar, trim, and so on.).
DESCRIPTIONDevelopment of Cavity Walls: Hole dividers don't
oblige exceptional stone work units. Routine ones are utilized
albeit metal as opposed to holding units entwine the stone work.
The external piece of the pit divider is typically block
workmanship. The inward divider may additionally be of brickwork,
however it is frequently built of basic mud tile, solid squares, or
plain or strengthened cement. At the point when a cavity divider is
built on an establishment divider it is fundamental that a
legitimately composed canal be introduced between the establishment
and the divider The metal blazing which shapes the drain is set
underneath the external piece of the divider, and is molded so it
turns up behind the external divider and is conveyed into a mortar
joint of the internal divider. A common plan is indicated in Fig.
1.
TIESIt is the capacity of binds to stay the two sections of the
hole divider together so that sufficient quality may be acquired
from the divider gathering. The tie must be solid in itself, and
enough of it must be inserted in mortar to give satisfactory jetty.
It ought to be no less than 3/16 inch in measurement and ought to
be curved at both closures to frame 2-inch legs. Likewise, it must
be erosion safe so that rusting in administration; thus the
utilization of non-ferrous ties is alluring does not decimate it.
Copper and bronze are suitable materials, as is steel with copper
welded to the surface or steel that bas been aroused by hot
plunging.
Shapes of cavity wall ties
ADVANTAGESThe most clear playing point of hole dividers over
those of strong brick work is the conceivable lessening in the
measure of workmanship utilized as a part of development, however
different preferences, for example, enhanced warm protection are
gotten from them. The most vital playing point of hole over strong
brick work dividers, on the other hand, is the positive security
against downpour entrance, which pit dividers can give. All
materials needed are normally accessible generally. Hole dividers
are vitality proficient when considering life cycle expense of a
building. Stone work development is extremely temperate concerning
long haul upkeep.
CONCLUSION Hole dividers give a vital preference over dividers
of strong stone work in that they can manage the cost of complete
security against downpour entrance notwithstanding when presented
to states of extreme wetting by wind-driven downpour. There are
three vital necessities for cavity divider development: the hole
divider must have a drain at its base to gather spillage water and
channels to direct water out of it; the two sections of the divider
must be secured together with metal ties that are erosion safe and
satisfactorily solid; the divider must have a pit free of mortar or
other material that may shape a water connect crosswise over it.
Pit dividers have been utilized as a part of numerous nations over
along time of time and have made their fabulous execution record
under generally differing conditions.
REFERENCES
wikipedia.org/wiki/Exterior_insulation_finishing_system
www.eima.com/about-eifs.shtml
www.dspinspections.com/eifs_facts.html eifscouncil.org/
www.markgroup.co.uk/homeowners/insulation/cavity-wall-insulation
www.energysavingtrust.org.uk/domestic/cavity-wall
en.wikipedia.org/wiki/Cavity_wall 5
