comparison - gw and rw

7/21/2019 Comparison - Gw and Rw

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TECHNICAL COMPARISON BETWEEN GLASSWOOL & ROCKWOOLINSULATION

Fibreglass Roc!ool

Composition KIMMCO Fiber Glass insulation products are

made of thermally and acoustic efficient

fiberized glass bounded with thermosetting

resin.

made from basalt, dolomite, limestone.

Contains up to "#$ o% '%iberi(e) 

materials, which means dust, fiber

migrations.

hot contents

!"M C#$$%

Nil U* +o "#$

urface Finish &

Feel

!s no unfiberised parts '(O") and the

fibers are FINE, fiberglass insulation

 products is ha*ing SMOOTH finish and feel

+oc wool comprises of COURSE %iber 

and due to the (O" content, it has a

ROUGH finish and feel.

T,er-al

Per%or-a'ces

"hermal

Conducti*ity '*alue)

"hermal +esistance

'+ *alue)

-$ times less density of roc wool productsre/uired to achie*e same thermal performances

 -$ times more density of roc wool productsre/uired to achie*e same thermal performances

of Glass wool products

Acos+ic

*er%or-a'ces

 0oise +eduction

Coefficient '0+C

*alue)

-$ times less density of roc wool productsre/uired to achie*e same acoustical

 performances1

-$ times more density of roc wool productsre/uired to achie*e same acoustical

 performances of Glass wool products

+esistance to low

fre/uencies

'-2 to #3% (4),

generated by

(5!C e/uipments

E.celle'+

No )a-age

hots are slowly breaing out from the roc 

fibers, under the effects of low fre/uency

*ibrations that lea)s +o saggi'g o% 

*ro)c+s/ a') !eig,+ losses.

Fire rating !"M

6#$7

non combustible non combustible

Flame spread

moe de*eloped

!"M 6389:;<-$

 0ot o*er -%

 0ot o*er %2

:; <-$ file + =<2$

 0ot o*er -%

 0ot o*er %2

#

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Corrosion Fiberglass insulation products )o 'o+ caseor accelera+e corrosio' ince it contains leachable Chloride andulphide any contact to metal with wet or

moist condition may case a') accelera+e

corrosio'. o it is not ad*isable to use on

metal surface if the temp. is less than #%2 >C

5ibration

+esistance

' sample assembly

is *ibrated for =7

hours at a

fre/uency of -2(z

with an amplitudeof 2.= inch )

"he weight loss obser*ed for fiberglass of

#- g9m$ density ? less +,a' 01"$

@ith NILL sagging

"he weight loss obser*ed for +ocwool of

$2 g9m$ density 2 -ore +,a' "010$

@ith # I'c, sagging

Important to know

E%%ec+ o% 3ibra+io' o' +,er-al 4 R 3ale5 a') acos+ic 4 STC 3ale5 *er%or-a'ces

o% *ar+i+io' !all !i+, roc !ool as ca3i+6 %ill i'sla+io' ele-e'+ i' +,e s*eci%ie)

co's+rc+io' o% Par+i+io'

+oc wool insulations made from basalt, dolomite, limestone irrespecti*e of its manufacturer 

contains shot contents 'unfiberized materials) in significant /uantities 'some times as high as-%A).

+oc wool insulations when tested for *ibration resistance 'sample assembly is *ibrated *ertically

for =7 hours at a fre/uency of -2 (z with an amplitude of 2.= inches) in accordance to B -=<-

shows the weight loss of around -7.7A and sagging of around %inch.

ound energy is percei*ed as *ibration. @hen roc wool insulation is se) as ca3i+6 %ill

i'sla+io' ele-e'+ i' +,e s*eci%ie) co's+rc+io' o% Par+i+io' Wall/ shots are slowly breaing

out from the roc fibres under the effect of low fre/uency *ibrations which generate sagging of 

 products. T,is lea)s +o crea+io' o% 3oi)s a') +,s acos+ic 4STC 3ale5 a') +,er-al 4R 3ale5*er%or-a'ces o% *ar+i+io' !all s+ar+s )e+eriora+i'g  and these performances are drastically

deteriorated o*er a period of time.

Ho! eas6 +o ,a')le +,e -a+erial

6!6 of handling the material on the obsite is assessed from its "ensile Grab trength which

is a measure of the force re/uired to tear an insulation material apart. ! high tensile grab

-

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strength is the reflection of the integrity of the fiberfiber bonding, fiber orientationthroughout the insulation. Fiberglass has almost double the "ensile Grab trength when

compared to the +OCK@OO;. In practical terms the fiberglass does not brea apart upon

handling. Breaage increases cost and compromises efficiency of installation on the grab.

Because of abo*e characteristic FIB6+G;! I MO" !D5I!B;6 FO+ +OOF !0D

@!;; I0:;!"IO0 OF E+660GI066+6D B:I;DI0G "6M. Due to the ecellent

strength and light weight of FIB6+G;! it can be stretched maimum to a*oid any

sagging . "his can a*oid usage of @ire mesh to protect insulation from sagging.

On the contrary +ocwool cannot be stretched1 resulted in sagging after some time 1 that iswhy it needs wire mesh to hold . "his adds Cost of installation.

 for  K:@!I" I0:;!"I0G M!"6+I!; M!0:F!C":+I0G CO. . !. K.

Dr. Kailash Chandra

Sr. Manager Technical

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