british-gypsum.com
Technical enquiriesBritish Gypsum Technical Advice CentreEast LeakeLoughboroughLeicestershireLE12 6HX
Telephone: 0844 800 1991Fax: 0844 561 8816Email: [email protected]
Training enquiries: 0844 561 8810
British Gypsum October 2014 PLASTERDL-06
“Gyproc”, “Thistle”, “Gypframe” and “Glasroc” are all registered trademarks of BPB United Kingdom Limited. “Isover” is a registered trademark of Saint-Gobain Isover and “Artex” is a registered trademark of BPB United Kingdom Limited.
BPB United Kingdom Limited is a limited company registered in England under company number 734396, having its registered office at Saint-Gobain House, Binley Business Park, Coventry, CV3 2TT, UK. BPB United Kingdom Limited trades as British Gypsum for part of its business activities.
British Gypsum reserves the right to revise product specification without notice. The information herein should not be read in isolation as it is meant only as guidance for the user, who should always ensure that they are fully conversant with the products and systems being used and their subsequent installation prior to the commencement of work. For a comprehensive and up-to-date library of information visit the British Gypsum website at: www.british-gypsum.com. For information about products supplied by Artex Limited or Saint-Gobain Isover please see their respective websites.
“British Gypsum” is a registered trademark of BPB United Kingdom Limited.
Thistle Plaster Selector GuideCreating perfect walls for modern spaces
FM 550533EMS 543324 OHS 550586
Thistle UniFinish
We passedthe only testthat matters. Yours.
It’s been thoroughly tested in our labs, but we know the only test that really matters is the one you put it through. So, we gave it to professional plasterers like Pete – who gave it their approval. They say it cuts out pre-treatment, gives a silky-smooth finish, and saves time not having to mop up PVA drips and splashes. Visit the website to find out why all the professionals are talking about new Thistle UniFinish.
Ideal for plastering over a wide range of surfaces without PVA, we’ve put Thistle UniFinish through its paces.
british-gypsum.com/thistle-unifinish
@theplastermanco
TO WaTch PeTe PlASTer VISIT YOUTUBe
ENMS 606206
Why choose Thistle plasters?
A guide to plastering - for full details refer to british-gypsum.com/thistleplaster1. What items will I need?– A clean mixing bucket & clean water
– A manual or mechanical mixing whisk
– Gyproc Trowel, a Hawk & Thistle Plaster Finishing Trowel
– Thistle solid plastering beads
– Thistle skim coat beads, Thistle ProTape FT50, or Gyproc Joint Tape for skimming only
2. What should the background be?
– Protected from the weather, with no risk of freezing
– Adequately strong, rigid and stable. Clean and free of dust and shutter release agents
– Reasonably dry & free of salt efflorescence
3. How do I mix plaster?– Use cleaned mixing equipment to
prevent contamination
– Pour the right amount of clean water into the mixing bucket (see selector chart for details)
– Add plaster to the water
– Mix to a smooth creamy consistency by hand or a slow speed, high torque mechanical whisk
– Do not continue mixing after lumps have been dispersed. Over mixing can affect setting times and cause difficulty in achieving a flat finish
4. How do I apply?– Use the oldest material first
– Plaster should not be applied to frozen backgrounds or in very hot or dry conditions
– Setting time is approximately 90 - 120 minutes, but finishing times can be extended in low temperatures by 30 minutes or more
– Do not mix more than you’ll be able to use, we suggest a maximum of two bags
5. Can I decorate or tile easily?– Thistle plasters can be decorated
with most paint finishes and wall coverings by following the manufacturers’ recommendations
– Tiles should be applied when background and plaster are dry
– Take care with Thistle HardWall and Thistle ToughCoat which dry from the surface, appearing surface dry before being fully dry
– Tiles up to 20kg/m2 can be applied directly to Thistle finish coats. If a bonding agent is used the limit is reduced to 12kg/m2
– Do not apply tiles directly to Thistle undercoats, with the exception of Thistle DriCoat
– When tiling onto finish plasters, avoid polishing the surface. If surface is polished, roughen and apply a suitable primer
Solid plastering – For corner reinforcement fix beads to all external angles using undercoat
plaster
– Thistle Plaster Stop Beads can also be used for defining and reinforcing edges of solid plasterwork
– Apply plaster with firm pressure after the joint treatment has stiffened but not set, building out to approximately 8mm thickness
– Scratch each coat and allow to set before applying the next
– The maximum thickness of undercoat plaster is 25mm. Greater thicknesses will require additional support, such as metal lathing, spaced away from the background if necessary
– Rule the final coat to an even surface and lightly scratch to form a key for finish coat plasters
Skim plastering – For corner reinforcement fix beads to all external angles
– Reinforce all plasterboard joints and internal angles by using Thistle ProTape or Gyproc Joint Tape. Gyproc Joint Tape will provide greater resistance to cracking particularly when board edges are not fully supported
– Apply plaster with firm pressure after the joint treatment has stiffened but not set, to approximately 1mm thickness
– Apply a second coat of plaster whilst the first coat is still wet to bring the total thickness to 2mm
– Trowel to a smooth matt finish as the plaster is stiffening
– Use any additional water sparingly and only in the latter stages of trowelling
ACTIVair technology: Making indoor spaces healthier
We spend 80% of our time indoors, in schools, offices, hospitals and our home. We take it for granted that the air we breathe is clean and pollutant-free. Yet impuritiesfound in both our working and living spaces can cause health problems and a reduction in our general well-being.Pollutants called VOCs – volatile organic compounds – are naturally emitted into our homes, offices and schools by people, pets, cleaning products as well as furniture, carpets, paints and varnishes.
acTIVair technology captures and permanently converts VOCs into harmless, inert compounds for at least 50 years. It is tested to decompose up to 70% of formaldehyde from the air.
Gypsum finish coat plaster with ACTIVair technologymaking indoor spaces healthier
Thistle PureFinish
25kg
Thistle PureFinish
Containing acTIVairtechnology for skim
finishing undercoats andplasterboards.
They provide
– A smooth seamless surface to walls and ceilings– Consistent finishing times– A scuff resistant surface– Solid base to fix into– Peace of mind with the British Gypsum SpecSure® lifetime
system warranty*
* Systems comprising of Thistle plasters and accessories are covered by the SpecSure® lifetime system performance warranty, reflecting our confidence in their performance.
– Good airtightness for improved acoustic and thermal performance
– Finishing coat achieved in one visit to the wall– Quicker installation time– Easy wallpaper stripping
THISTle MAGNeTIC PlASTerDesigned for creativity
An innovative new plaster that attracts magnets.
With our newly developed,easy-to-apply Thistle MagneticPlaster you can transformany wall into a surface thatattracts magnets, making theideal display board. Ourinnovative formula enablesyour customers to endlesslychange what’s on show – nofuss, no mess. So it’s perfect for children’s bedrooms, living areas, kitchens and home offices.
Skim finish plaster
What is the background surface?
suction
Dry
un
derc
oats
Dam
p u
nde
rcoa
ts
Plas
terb
oard
Flat
, sm
ooth
con
cret
e
Wat
erpr
oofe
d
cem
ent-
base
d u
nde
rcoa
ts
Thic
knes
s ap
plie
d
Cov
erag
e pe
r ba
g (a
t 2m
m)
Wat
er re
quir
emen
t (li
tres
per
bag
)
Dry
set
wei
ght
(at
2mm
th
ickn
ess)
Esse
ntia
l fin
ish
Thistle MultiFinish A versatile plaster for skim finishing undercoats and plasterboards
DAMPEN
BACKGROUND
FIRST USE ON
MR BOARDS
2mm
10m
2
11.5
3.4k
g/m
2
Thistle BoardFinish For low to medium suction backgrounds especially plasterboard
USE ON
MR BOARDS
2mm
10m
2
11.5
3.4k
g/m
2
Thistle SprayFinish Gypsum finish plaster for spray or hand application
USE ON
MR BOARDS
2mm
11m
2
12 2.4k
g/m
2
Perf
orm
ance
fin
ish
Thistle DuraFinish A versatile plaster that is 60% tougher than standard skim plasters
2mm
10m
2
12 3.4k
g/m
2
Gypsum finish coat plaster with ACTIVair technologymaking indoor spaces healthier
Thistle PureFinish
25kg
Thistle PureFinish
Featuri
ng
VO
C absorbing tech
nology ●
Thistle PureFinish Finish plaster containing ACTIVair technology for finishing undercoat plasters and plasterboard
DAMPEN
BACKGROUND
FIRST USE ON
MR BOARDS
2mm
10m
2
11.5
3.4k
g/m
2
Thistle UniFinish2 The plaster that works without PVA
2mm
11m
2
12 2.4k
g/m
2
Minimum temperature to be maintained until dry is 2°C for Thistle BoardFinish, Thistle MultiFinish and Thistle SprayFinish, and 5°C for Thistle DuraFinish.
On flat surfaces, 2mm is recommended, If the surface is very uneven, consider dubbing it out with an undercoat.
Undercoat solid plaster
What is the background surface?
suction
Air
cret
e bl
ocks
Com
mon
bri
cks
Med
ium
-den
sity
blo
cks
Den
se b
lock
s
Engi
nee
rin
g br
icks
wit
h
rake
d jo
ints
Plas
terb
oard
&
Gla
sroc
F m
ultiboard
Cas
t in
sit
u &
pre
-cas
t co
ncr
ete
Pain
ted/
tile
d su
rfac
es
Met
al la
thin
g
Thic
knes
s ap
plie
d –
wal
ls
Thic
knes
s ap
plie
d –
ceili
ngs
Cov
erag
e pe
r ba
g h
and
appl
ied
(a
t 11
mm
)
Wat
er re
quir
emen
t (li
tres
per
bag
)
Dry
set
wei
ght
(at
11m
m)
Two
coat
Thistle HardWall High impact resistance for most masonry backgrounds. Can be spray applied1
NOT ON
SMOOTH
LOW
SUCTION
BLOCKS
WHEN
BRIDGING
COLUMNS
AND LINTELS
11m
m
8mm
3.0m
2
15 9.3k
g/m
2
Thistle ToughCoat High coverage for most masonry backgrounds. Can be spray applied1
NOT ON
SMOOTH
LOW
SUCTION
BLOCKS
WHEN
BRIDGING
COLUMNS
AND LINTELS
11m
m
8mm
3.5m
2
17.5
8.5k
g/m
2
Thistle Browning For solid backgrounds with adequate key
USE IN
EXTREME
CASES11
mm
8mm
3.5m
2
17.5
8.4k
g/m
2
Thistle BondingCoat For smooth and low suction backgrounds
USE ON
SMOOTH
LOW
SUCTION
BLOCKS
USE ON MR
BOARDS
11m
m
8mm
2.75
m2
14 12.1
kg/m
2
On
e co
at Thistle Universal OneCoat For hand or spray application to most backgrounds
USE ON
SMOOTH
LOW
SUCTION
BLOCKS
USE ON MR
BOARD
13m
m
10m
m
2.25
m2
at
13m
m
15 15kg
/m2
at
13m
m
Suct
ion
cont
rol Thistle GypPrime
Suction control primer used to reduce suction on very dry backgrounds. Use diluted (up to 5 parts water to one part Thistle GypPrime) or undiluted if severe suction control is required. Plaster is applied after Thistle GypPrime has
soaked into the background.
Use Thistle GypPrime where you see this symbol
Bond
ing
agen
t Thistle Bond-It Bonding agent for smooth low suction backgrounds. Apply undiluted, in one coat.
Plaster when dry.
Use Thistle Bond-It where you see this symbol
Setting times: Thistle undercoat plasters – 1½ to 2 hours. Thistle finish plasters – 1½ to 1¾ hours. 1 Coverage relates to hand applied.
High Low High
Spec
ialis
t pl
aste
rs Thistle Magnetic Plaster A Thistle plaster that attracts magnets leaving a quality surface for internal walls and a durable base for applying decorative finishes. Can be used to finish a wide range of backgrounds, including undercoat plasters and plasterboard. A minimum of 3mm thickness should be applied and coverage is 5.1m2 per bag.
Thistle DriCoat Cement based plaster for replastering after a damp proof course. Finished with Thistle BoardFinish.
Thistle Plaster Selector Guide
Recommended for use
2 See british-gypsum.com/thistle-unifinish for full details.
Lowsuction
Brit
ish
Gyp
sum
Nov
embe
r 20
14
BG
-TH
SGA
3-14
-01