from Tarmac Topblock - MKM Building Supplies · vital advice on the suitability of Tarmac Topblock products. ... Material dry density (kg/m3) 460 630 730 Thermal ... 4.7 5.4 5.8 6.1

Toplite _ aircrete blocks

from Tarmac Topblock

Toplite Introduction

2 www.topblock.co .uk

Introduction 3

Product selector 4

Toplite GTI 5

Toplite Standard 5

Toplite ‘7’ 5

Toplite Foundation 7

Toplite Coursing bricks 8

Toplite Floor 9

Application 10

Walls below DPC 10

Internal walls 10

Separating walls 10

Toplite in flats 10

External walls 12

Thermal insulation 12

U-values 13

Design 14

Safe handling 14

Movement control 14

Mortar 14

Wall ties 15

The UK’s top block solutionTarmac Topblock offers a complete range ofaircrete, dense and lightweight products. As a UKmarket leader, you can expect our blocks to meetthe most demanding of building requirements.

Using Tarmac Topblock you can take advantage of:

ChoiceOffering you a product for every application fromour 4 key brands – Durox, Toplite, Hemelite andTopcrete.

Quality productsContinued investment in our extensive network ofproduction facilities means that you should onlyget the highest quality products.

Customer serviceWe can be relied upon to deliver service, friendlyadvice and partnership.

Reliability We have set a national target for on-time deliveriesand aim to inform you of any likely delays.

Sales supportHelping you with well located sales offices and anexperienced external sales team, serving local,regional and national customers.

Technical supportDedicated technical services, providing you withvital advice on the suitability of Tarmac Topblockproducts.

InnovationContinuously developing our range of innovativeproducts and services, to respond to your needs.

ResponsibilityTaking our corporate responsibility seriously, bysharing best practice in safety, health andenvironment for all.

Part of the Tarmac GroupTarmac can provide you with a range of productsfor virtually every construction purpose.

Low unit weight Most sizes of Toplite blocks meet thehealth and safety standards for single-person repetitivehandling, helping to protect you from injury.

Fast build blocks Toplite blocks are light and easy tohandle, decreasing your build time.

Thermal insulation Toplite blocks have exceptionalthermal insulation properties which combined with addedinsulation can meet the requirements of Part ‘L’ of theBuilding Regulations.

Sound Toplite blocks have excellent sound insulationproperties that can comply with the Robust DetailsSpecification of the Building Regulations.

Fire resistant The non-combustible properties of Topliteblocks mean that most constructions will surpass therequirements of the Building Regulations.

High loadbearing A wide range of strengths are availablein Toplite blocks to cater for the requirements of generalhousing and other buildings.

Easy to cut Toplite blocks are easy to cut and chase usingbasic hand tools.

Cost-effective Toplite blocks offer cost-effective buildingmethods.

Traditional Toplite blocks offer proven, risk free andfamiliar building methods.

Availability Toplite blocks are widely and readily available.

Recyclable Toplite blocks are recyclable.

Surface finishes Toplite blocks offer an ideal backgroundfor drylining, plaster, render and fixings.

3 National Sales Helpline: 0845 606 2468

Toplite Introduction

TopliteToplite aircrete is a modern

construction material with

excellent thermal and acoustic

properties. It is a versatile

material which is able to provide

solutions below ground in

foundation walls, in suspended

beam and block floors and all

types of internal and external

walling situations.

For many years Toplite products

have been used for the inner leaf

of cavity walls in conjunction

with various insulation materials,

making a valuable contribution

to the overall thermal

performance of the building.

AuthorityToplite products are BSI

Kitemarked to BS EN 771-4 and

are manufactured under a

Quality System complying with

BS EN ISO 9001. They conform to

the ‘Special Category of

Manufacturing Control’

requirements specified in

BS 5628-1.

The British Board of Agrément

has independently assessed

Toplite products. BBA Certificate

02/3896 covers Toplite GTI,

Standard, ‘7’ and Foundation

blocks.

EnvironmentalAll Topblock manufacturing

plants operate an environmental

management system conforming

to ISO:14001. All sites are

independently assessed for

compliance by BSI.

Summary ratings applicable to

Toplite constructions can be

found in The Green Guide to

Housing specifications. These

include constructions that

achieve ‘A’ rating and thereby

qualify for credits when projects

are subject to an environmental

rating such as Ecohomes.

Appearance Toplite blocks are white to grey

with a characteristic keyed

surface pattern. Each product

type is supplied in shrink-

wrapped packs for protection

and easy identification on site.

Working with TopliteToplite products have excellent

working characteristics. They are

light and easy to handle and quick

to install. They can be easily cut,

chased and fixed into. Toplite is

suitable for finishing with render,

cladding, plaster or drylining.

Certificate No. 69579

BS EN 771-4

Technical Services: 0870 242 14894

Toplite Product selector

WallsApplication

Cavity inner leaves and / or solid walls Toplite GTI Toplite Coursing

or Standard bricks

Separating walls Toplite Standard Toplite Coursing

bricks

Higher loadbearing walls Toplite ‘7’ Toplite Coursing

bricks

FoundationsApplication

Solid walls below dpc Toplite Foundation

Cavity walls below dpc Toplite GTI,

Standard or ‘7’

FloorsApplication

Beam and block floors Toplite Floor

65mm

215mm

440mm

Width

535 or360mm

215mm

440mm

215mm

440mm

215mm

440mm

www.topblock.co .uk5

Toplite GTI, Standard and ‘7’

Material propertiesGTI Standard ‘7’

Compressive strength to BS EN 771-4 (N/mm2)2.9 3.6 7.3

Equivalent compressive strength to BS 6073 (N/mm2)2.8 3.5 7.0

Material dry density (kg/m3)460 630 730

Thermal conductivity (W/mK) @ 3% moisture content0.11 0.15 0.19

Moisture movement (mm/m) (shrinkage)<0.70 for all products

Typical airtightness (m3/(h.m2) @ 50 Pa)100mm blocks – all grades, no finish 0.12 for all products

Block width (mm)75 90 100 115 125 130 140 150 190 200 215 260 265 275 300

GTI - - 4.7 5.4 5.8 6.1 6.5 7.0 8.9 9.4 10.1 - 12.4 - -

Standard 4.6 5.5 6.1 - 7.7 - 8.6 9.2 11.7 12.3 13.2 16.0 - 16.9 18.4

‘7’ - 6.4 7.1 - - - 10.0 10.7 13.5 14.2 15.3 - - - -

Notes Unit and laid weights, which are given for design purposes, are approximate only and based on 3% moisture content

Dimensional tolerance to BS EN 771-4: Length +3/-5, width +3/-3, height +3/-5

Block width (mm)75 90 100 115 125 130 140 150 190 200 215 260 265 275 300

GTI - - 58 67 72 76 81 87 110 117 125 - 154 - -

Standard 54 65 72 - 91 - 101 109 138 145 156 188 - 199 217

‘7’ - 74 82 - - - 115 123 156 164 176 - - - -

Sizes and unit weights (kg)

Laid weights (kg/m2)

TopliteToplite combines low unit weight

with high thermal insulation, in

strengths from 2.9 to 7.3 N/mm2.

Toplite GTI offers a high level of

thermal insulation and can be

used to reduce the amount of

additional insulation. It is ideally

suited for the construction of inner

leaves and solid external walls.

Toplite Standard can be used for

all general-purpose walling

applications including inner

leaves, solid walls, internal

partitions and walls below DPC.

Toplite Standard is recommended

for use in separating walls

including those conforming to

Robust Detail E-WM-6, as well as

other key applications such as

the rendered outer leaf of

cavity walls.

Toplite ‘7’ is suitable for more

demanding loadbearing

applications whilst retaining the

characteristic low unit weight of

aircrete. It may also be used in

separating walls including those

conforming to Robust Detail

E-WM-6.

National Sales Helpline: 0845 606 24686

FireToplite blocks are non-

combustible and conform to

Class O rating for the surface

spread of flame. The fire

resistance values shown are in

accordance with BRE Report

‘Guidelines for the Construction

of Fire-resisting Structural

Elements’ (1988).

The application of finishes

will generally improve the

fire resistance. Further details

are available.

Sound insulationToplite blocks may be used to

provide acoustic insulation

between internal rooms. The

Building Regulations Approved

Document E requires certain

internal walls and floors in

dwellings to meet a performance

standard of 40 Rw dB. This can

be met, for example, using

100mm Toplite GTI or Standard

finished with plaster or drylining.

Sound reduction values of other

Toplite products are shown in

the table opposite.

Toplite GTI, Standard and ‘7’

Fire resistance, no finish (hours) 1 2 4

GTI: minimum width (mm)loadbearing 90 130 200

non-loadbearing 75 100 140

Standard or ‘7’: minimum width (mm)loadbearing 90 100 190

non-loadbearing 75 75 100

Fire resistance of walls – single leaf wall

Sound reduction values – single leaf wall

Notes Finishes to both wall faces are assumedValues are based on technical assessment and tests to BS EN 140

Finish No Lightweight Drylining

finish plaster

GTI: weighted sound reduction index, (Rw dB)100mm 38 41 40

140mm 41 43 43

215mm 46 48 48

Standard: weighted sound reduction index, (Rw dB)100mm 40 41 42

140mm 44 46 46

215mm 49 50 50

‘7’: weighted sound reduction index, (Rw dB)100mm 41 44 43

140mm 45 47 47

215mm 50 51 51

Note Check the relevant product pages for available sizes


Toplite Foundation

Foundation

Compressive strength to BS EN 771-4 (N/mm2)3.6 7.3

Equivalent compressive strength to BS 6073 (N/mm2)3.5 7.0

Material dry density (kg/m3)630 730

Thermal conductivity (W/mK) @ 3% moisture content0.15 0.19

Material properties

Coursing height (mm) 215

Block width (mm) 260 275 300 Foundation 3.6 N/mm2

16.0 16.9 18.4

Foundation 7.3 N/mm2

18.5* 19.6* 21.3*

Size and unit weights (kg)

Coursing height (mm) 215

Block width (mm) 260 275 300 Foundation 3.6 N/mm2

188 199 217

Foundation 7.3 N/mm2

213* 226* 246*

Laid weights (kg/m2)

Note Unit and laid weights, which are given for design purposes, are approximate onlyand are taken at 3% moisture content.

*Manufactured to order.

Toplite FoundationFoundation is produced specifically

for use below DPC in solid walls. It

replaces the inner and outer leaf,

wall ties and concrete cavity fill

associated with traditional

construction methods. This means

that construction time may be

halved compared to cavity walling

and that the wall becomes stable

soon after laying, eliminating the

risk of collapsed cavities.

ApplicationsFoundation can be used to support

cavity, solid walls or frame

constructions.

Owing to its excellent insulating

properties, the product provides

perimeter insulation to ground

floors. U-values can be calculated

upon request.

Toplite Foundation is suitable for

use in Class DS-1, DS-2 and DS-3

sulfate soil conditions as confirmed

by British Board of Agrément

Certificate No. 02/3896.

The appropriate width of Toplite

Foundation should be selected to

suit the width of cavity or solid

wall that requires supporting

above DPC.

For advice on the selection of

mortar refer to page 14.

Toplite Foundation blocksbelow DPC

TopliteFoundation

Insulation

DPC

Screed


Toplite Coursing bricks

Toplite Coursing bricksCoursing bricks are designed for

use with the range of Toplite

blocks, to avoid thermal bridging

and minimise wastage.

ApplicationToplite Coursing bricks should be

used for general coursing work,

infilling small areas of wall such

as between timber floor or roof

members as well as closing

cavities at eaves, reveals and sills.

Their use will eliminate cutting

and wastage.

Brick width (mm) 100 115 125

Compressive strength to BS EN 771-4 (N/mm2)2.9 3.6 7.3

Equivalent compressive strength to BS 6073 (N/mm2)2.8 3.5 7.0

Material dry density (kg/m3)460 630 730

Thermal conductivity (W/mK) @ 3% moisture content0.11 0.15 0.19

Material properties

Typical application

Brick width (mm) 100 115 125

GTI: 2.9 N/mm2 - Unit weight (kg)

1.0 1.0 1.0

Standard: 3.6 N/mm2 - Unit weight (kg)

1.0 - -

‘7’: 7.3 N/mm2 - Unit weight (kg)

1.0 - -

Bricks per pack 500 500 500


Note Unit and laid weights, which are given for design purposes, are approximate andbased on 3% moisture content

65mm

215mmWidth


Toplite Floor

Toplite Floor blocksFloor blocks are suitable for use in

suspended floors in conjunction

with precast concrete beams.

They are light and quick to install,

and provide effective sound and

thermal insulation for ground and

internal floors meeting the

requirements of the Building

Regulations.

The use of Toplite Floor blocks can

achieve economy in the overall

design of the floor: firstly by a

reduced dead load; secondly the

size of the block allows much more

flexibility in beam spacing,

allowing fewer beams to be used.

ApplicationsToplite Floor blocks are suitable

for use in beam and block

suspended ground and internal

floors in single occupancy

dwellings under domestic loading.

Where high point loading is

anticipated, such as in garages,

a reinforced structural topping

must be used. Where the floor

loading dictates closer beam

spacing, a 440 x 215 x 100mm

Toplite Standard block may be

used, spanning its 215mm

dimension.

Coursing slips to in-fill between

beam-ends are available in a 37mm

bedding height. For 175mm deep

beams Toplite Coursing bricks

are available.

The requirements of Building

Regulation E2 ‘Protection against

sound within a dwelling house’ can

be easily met using a beam and

block internal floor finished with a

minimum 50mm sand and cement

screed and plasterboard ceiling.

Tests commissioned by the Aircrete

Products Association confirm that

the airborne sound reduction (Rw)

for a floor finished with a 50mm

sand and cement screed and

plasterboard ceiling is 51 Rw dB.

This exceeds the minimum required

value of 40 Rw dB.

Transverse loadThe blocks have been tested at a

440mm and 535mm clear span to

sustain a point load of 3.5KN.

This load was transferred via a

100mm x 100mm steel plate.

Thermal InsulationThe use of Toplite Floor blocks will

reduce the amount of ground floor

insulation needed compared to the

use of denser floor blocks. This will

be further improved when used in

combination with Toplite

Foundation blocks.

Floor

Compressive strength to BS EN 771-4 (N/mm2)3.6

Equivalent compressive strength to BS 6073 (N/mm2)3.5

Material dry density (kg/m3)630

Thermal conductivity (W/mK) @ 3% moisture content0.15

Material properties

Block size on plan (mm) 440 x 215* 440 x 3601 440 x 5352

Block width (mm) 100 100 100 Floor

6.1 10.3 15.0


Notes Unit and laid weights, which are given for design purposes, are approximateand based on 3% moisture content*Available as Toplite Standard spanning the 215mm dimension1. Supplied from Ford Plant 2. Supplied from Alfreton Plant

Screed Concrete floor beam

Toplite flooring block

Typical beam and Toplite block intermediate floor

PlasterboardTimber battens


Toplite Application

10

Walls below DPCToplite products can be used to

construct walls below ground.

They can be used in sulfate soil

conditions as shown in the table

opposite and as confirmed by

British Board of Agrément

Certificate No. 02/3896. In

addition they are resistant to the

freeze / thaw conditions likely to

occur below the DPC, as

confirmed by tests to MOAT 12.

Toplite Foundation blocks should

be specified to construct 260-

300mm solid walls below ground.

They are intended to support

cavity or solid walls of equivalent

width above ground. Toplite

Standard (or any higher strength

Toplite product) can be used to

construct internal and external

walls below ground.

Toplite GTI is recommended for

use in the construction of inner

leaves only below ground and is

suitable for use in Class D-1 sulfate

soil conditions as confirmed by

British Board of Agrément

Certificate Nos. 02/3896.

Internal wallsAny grade of Toplite can be used for

the construction of internal walls. For

partitions in dwellings these products

can be used to provide good levels

of airborne sound insulation as

well as a suitable background for

finishes and for fixings.

For commercial and industrial

applications Toplite may be used

to provide sound insulation, fire

resistance and structural strength.

Certain internal walls are

required to provide a level of

sound insulation as required by

the Building Regulations E2.

Walls between bedrooms, or a

room containing a water closet,

and other rooms, need to

provide the minimum sound

insulation of 40 Rw dB. The

constructions on page 11 have

been assessed and / or laboratory

tested to demonstrate the

performance level required by

Approved Document E.

Separating wallsThe Building Regulations require

separating walls to provide

reasonable resistance to sound

transmission.

Guidance on suitable Toplite

constructions capable of meeting

the specified performance is

shown on page 11. This includes

constructions that can be built to

satisfy Robust Detail E-WM-6.

The use of Robust Details

provides an alternative to

pre-completion testing for

demonstrating compliance with

Part E for new build dwellings.

Robust Details should be used in

accordance with the scheme

requirements including plot

registration.

The performance of separating

walls is highly dependent on the

design, detailing and good

workmanship of the associated

flanking construction. Further

guidance is given in the Topblock

Design Guide.

Toplite in flatsToplite can be used to construct

flanking and separating walls

based on Robust Detail

specifications.

Flanking wallsToplite can be used for the inner

leaf of the external walls in

accordance with the following

Robust Detail separating floors

without the need to undertake

routine pre-completion testing.

Robust Detail E-FC-3 Use Toplite Standard or ‘7’ of

minimum 100mm width.

Robust Detail E-FC-4Use Toplite GTI, Standard or ‘7’

of minimum 100mm width.

Sulfate soil conditionsToplite aircrete blocks

DS-1 DS-2 DS-3

Toplite Foundation ✓ ✓ ✓

Toplite GTI* ✓

Toplite Standard ✓ ✓ ✓

Toplite ‘7’ ✓ ✓ ✓

Note *Suitable for use as the inner leaf of cavity walls and internal walls below dpc

Wall blocks comprising• 100mm Toplite GTI• 100mm Toplite Standard • 100mm Toplite ‘7’

Infill blocks comprising• 100mm Toplite Floor

Plaster or drylining

50mm min sand/cement screed

Any ceiling finish

No site testing

required

13mm drylining or plaster(10kg/m2 min)

Site testing

required

RD - no site

testing

required

Toplite Application

11

New Dwellings - Robust DetailsConstruction elements Methods of compliance RD ref Recommended solution

Separating walls Robust Details E-WM-6

Pre-completion testing

not required

75mm min cavity

2 x Toplite Standard2 x 100mm Toplite ’7’

New Build Dwellings and ExtensionsConstruction elements Methods of compliance Recommended solution

Internal Walls Approved Document ‘E’ prescriptive

solutions or Topblock constructions

which have been shown by testing

to meet the regulations

Internal Floors Approved Document ‘E’ prescriptive

solutions or Topblock constructions

which have been shown by testing

to meet the regulations

New Dwellings - Pre-completion testingConstruction elements Methods of compliance Recommended solution

Separating walls Constructions requiring

pre-completion testing in

accordance with Approved

Document E or other technical

guidance e.g. BBA certification

or field test data

New Build Rooms for Residential Purposes*Any of the recommended solutions shown for the New Build Dwellings (above) can be specified for separating walls foruse in rooms for residential purpose. In addition the solutions shown below may be used:

Construction elements Methods of compliance Recommended solution

Separating Walls Constructions requiring

pre-completion testing in

accordance with Approved

Document E or other technical

guidance e.g. BBA certification

or field test data

• 215mm Toplite Standard • 215mm Toplite ‘7’

Note *Rooms for residential purposes include hotels, hostels, boarding houses, halls of residence and residential houses but exclude hospitals or similarestablishments used for patient accommodation

13mm plaster (10kg/m2 min)

13mm plaster (10kg/m2 min)

215mm

Site testing

required

75mm min cavity

Drylining (8kg/m2 min)

Nominal 8mmparging

2 x Toplite Standard2 x 100mm Toplite ’7’


Toplite Application

External wall construction External finish Comments

Clear cavity

Clear cavity

Partial cavity fill

Full fill

Note Any grade of Toplite includes GTI, Standard or ‘7’

Separating wallsThe Robust Detail testing

programme that led to the

aircrete separating wall

specification (E-WM-6)

demonstrated that these

constructions performed as well

as higher density aggregate

block constructions. As a result of

this, Table 3 of the Robust

Details handbook allows Toplite

cavity separating walls to be

used in combination with the

separating floor constructions

E-FC-1, E-FC-3 & E-FC-4. This

indicates that Toplite blocks can

be used in both the flanking and

separating walls, thereby gaining

the twin benefits of excellent

thermal and sound insulation.

When using these options,

however, the floor will be subject

to pre-completion testing.

Work continues in developing

additional Toplite specifications

through the Robust Details

programme and it is advisable to

refer to Topblock Technical

Services or our website

www.topblock.co.uk for the most

up-to-date specifications.

External walls Toplite blocks may be used to

construct cavity and solid external

walls. For cavity construction the

minimum leaf width will normally

be 90mm. Toplite blocks are

suitable for a range of external

finishes as shown in the table

below.

In a single leaf wall the minimum

width of Toplite, with or without

rendering, may be selected from

BS 5628-3.

Thermal insulationSome typical construction

solutions to comply with Building

Regulation Part L, Conservation

of Heat and Power, are shown on

page 13. As insulation material

sizes and their thermal

conductivity are subject to

change, it is recommended that

the U-value of constructions be

periodically confirmed by

reference to Technical Services or

the Topblock website.

Any external cladding

material such as timber

boarding or hanging tiles on

battens

Two coats of designation (iii)

sand/cement render


sand/cement render


sand/cement render

Both leaves may be any grade of

Toplite block. Additional insulation

may be required

The inner leaf may be any grade of

Toplite block. The outer leaf should

be Toplite Standard or ‘7’


Toplite block.The outer leaf should

be Toplite Standard or ‘7’


Toplite block. The outer leaf should

be a Topblock Hemelite or Topcrete

block

Toplite separating & flanking walls in flats

*In accordance with Table 3 of the Robust Details handbook these separating floorsrequire pre-completion testing

RD ref No

E-WM-6(Conventional

mortar)

Toplite Blocks 2 x 100mm with

75mm cavity

Toplite StandardToplite ‘7’

Toplite inner leaf100mm min

Toplite GTI, StandardToplite ‘7’

RD ref No

E-FC- 1, 3 & 4

Flanking wall Robust Detailseparating floor*

Robust DetailSeparating Wall

Thermal insulation(continued)From April 2006 Approved

Document L1A, (new dwellings)

of the Building Regulations, was

introduced so that compliance is

demonstrated by showing that

the Dwelling emission rate (DER)

is no greater than the Target

emission rate (TER) of a notional

building of the same size as the

proposed house. The TER is

calculated using standard

defaults for the fabric insulation

and the heating and hot water

systems that are embedded

within the SAP 2005 software,

resulting in a 20% reduction in

CO2 emissions compared to the

previous requirements.

The actual level of fabric

insulation required will be

dependant upon a number of

factors including the fuel type

used and the efficiency of the

heating system. The diagram

below shows typical U-values for

the exposed elements of the

building, assuming that the fuel

type is mains gas, which could

form the starting point for the

DER calculation.

Approved Document L1B covers

the standard of insulation

required when building work is

carried out on an existing

dwelling. When constructing an

extension to a dwelling

minimum elemental U-values

apply as shown in the table

below.


Toplite Application

Elemental U-values for extensions to existing dwellings

Element Dwellings U-value (W/m2K)

Walls 0.30

Floor 0.22

Roof insulation at ceiling level 0.16

Roof insulation at rafter level 0.20

Roofs (flat) 0.25

Windows, roof windows & rooflights 1.80

Doors with more than 50% of internal face glazed 2.20

Other doors 3.00

Internal finish U-value of 100mm inner leaf (W/m2K)

Thermal laminate Toplite GTI Toplite Std Toplite 7

50mm ThermaLcheck K (2.27 m2K/W) 0.28 0.29 0.30

60mm ThermaLine Super (2.32 m2K/W) 0.27 0.29 0.30

65mm ThermaLine Super (2.55 m2K/W) 0.26 0.27 0.28

U-values using clear cavity with thermal laminates

Typical U-values

Roof with ceilingU-value = 0.14 W/m2K

Roof window or rooflightsU-value = 1.8 W/m2K

Exposed wallsU-value = 0.30 W/m2K

Sloping or flat roofU-value = 0.14 W/m2K

Windows and doorsU-value = 1.8 W/m2K

Gas boiler with aminimum SedbukOf 86%

Ground floorU-value = 0.20 W/m2K

14 Technical Services: 0870 242 148914

Toplite Application

Safe handlingAircrete is an inherently

lightweight material, which

ensures that the majority of

Toplite aircrete blocks fall within

the guidance (see Health and

Safety Executive Construction

Sheet 37) for single-person

repetitive handling. Some

Foundation blocks in widths of

260mm to 300mm may exceed

the nominal 20kg guidance at

the conventional 215mm

coursing height.

For guidance on the approximate

weights of Toplite blocks refer to

the relevant product pages.

Movement controlMovement joints should be

provided in accordance with

BS 5628-3 generally at intervals

of 6m. Movement joints are not

usually necessary for internal

walls in dwellings.

In areas of concentrated stress,

such as above and below

openings, consideration should

be given to the introduction of

bed joint reinforcement.

MortarThe mortar type should be

selected taking into account

durability, structural strength

and provision for movement.

Detailed guidance on the

selection of mortars is

given in BS 5628-3 and

BS 8000-3.

For work above ground level

(DPC), mortar designation (iii)

will normally be satisfactory.

U-values using full fill insulation



13mm Dense plaster 0.29 0.31 0.32

13mm Lightweight plaster 0.29 0.30 0.31

9.5mm Plasterboard on dabs 0.28 0.30 0.31


Insulation

75mm Dritherm 32k = 0.032 W/mK

U-values using partial fill insulation

Note Resistance of low –e cavity 0.644 m2K/W







Insulation

40mm Kingspan TW50k = 0.023 W/mKwith low-e cavity*

Note Resistance of low –e cavity 0.64 m2K/W







Insulation

45mm Kingspan TW50k = 0.023 W/mKwith low-e cavity*

Toplite Design

Flat metal tiewith one end de-bondedin alternate courses

Jointfiller

Sealant whererequired

Typical movement joint


Toplite Design

Wall tiesUse wire butterfly or double

triangle ties complying with

BS 1243, or other ties complying

with DD 140-2, at the density

and positioning required by the

Building Regulations and

BS 5628-1 & 3. The use of vertical

twist ties should generally be

avoided when using aircrete

blocks unless the cavity width

exceeds 75mm.

For separating walls, butterfly

ties or ties conforming with

Type A as specified in Approved

Document E should be used.

Design GuideMore detailed design

information including advice on

structural design, durability and

movement control can be found

in the Topblock Design Guide.

Sitework GuideMore detailed site guidance

including advice on site storage,

internal and external finishes can

be found in the Topblock

Sitework Guide.

Specification

Blockwork to: (state location)

Blocks to BS EN 771-4: Toplite aircrete concrete blocks Compressive Strength (N/mm2)

Manufacturer: Tarmac Topblock Limited BS EN 771-4

Grade and compressive strength: *GTI 2.9

*Standard 3.6

*’7’ 7.3

*Foundation 3.6

*Foundation 7.3

*Floor 3.6

Shape and dimensions:

Wall block: 440mm long x ……mm width x 215mm high(GTI, Standard and ‘7’)

Foundation block: 440mm long x ……mm width x 215mm high

Floor block: 440mm long x ……mm width x 360/535mm wide

Coursing brick: 215mm long x ……mm width x 65mm high

Note * Delete as applicable

Suggested mortar mixes

Work above DPC - mortar designation (iii)a) 1 portland cement,

1 hydrated lime,6 sand

b) 1 portland cement,6 sand + plasticiser

c) 1 masonry cement 5 sand

Work below DPC - mortar designation (ii)a) 1 portland cement

4 sand + plasticiser

Notes The sand should conform to BS 1200 Factory produced mortars or carefully gauged site mixed mortars should be used

Mortar (continued)Below ground level, mortar

designation (iii) or (ii) may be

used in accordance with

BS 5628-3.

Stronger mixes, which may be

required for structural reasons,

are not recommended for use

with our aircrete products.

All mix proportions are given

by volume.

CI/SfBFf4

September 2006

Tarmac Topblock LimitedMillfields RoadEttingshallWolverhamptonWest Midlands WV4 6JP

Website: www.topblock.co.uk

Although Tarmac Limited does its best to ensure that any advice, recommendations or information it may give is accurate, no liability or responsibility of any kind (including liability for negligence) is

accepted in this respect by Tarmac Limited, its staff or agents. Claims and statements made by Tarmac Limited regarding its products refer to those which have been properly handled on site. Tarmac

Limited cannot accept any liability or responsibility of any kind (including liability for negligence) for problems caused by the acts or omissions of third parties or by poor practices.

Tarmac and the ‘T’ mark are registered trademarks of the Tarmac Group.

Where do I find more? Tarmac Topblock offer a complete range of aircrete, lightweight and dense products. As a UK market leader you can

expect our blocks to meet the most demanding of building regulations and requirements. To make contact could

not be easier!

National Sales HelplineCall us on: 0845 606 2468

Technical Helpline Call us on: 0870 242 1489

Email: [email protected]

Literature requests: Call us on: 08456 044 114

Email: [email protected]

Quote reference L110

The product brochures available include:

Durox - large format aircrete blocks

Hemelite & Topcrete - lightweight & dense aggregate blocks

Durox System - thin joint blocks

Documents

from Tarmac Topblock - MKM Building Supplies · vital advice on the suitability of Tarmac Topblock products. ... Material dry density (kg/m3) 460 630 730 Thermal ... 4.7 5.4 5.8 6.1