Liquid solutions for flat roofs polyroof products limited - online version

FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS

Continual Professional Development Seminar

A G U ID E TO L IQ U ID A P P L IED ROOF IN G SYSTEMS

A technical comparison of different flatroofing systems available to the specifier

• Polyroof Established in 1984

• Based in Flint in North Wales

• ISO 9001 & ISO 14001

• We have built a strong reputation with architects, surveyors, specifiers

and contractors for providing a range of products that deliver cold

applied liquid roofing solutions

P OLYROOF INTROD UCTION

NEW BUILD REFURBISHMENT GREEN CONSERVATION

From this……to this

P OLYROOF SOLUTIONS

• Review of flat roofs

• Introduce liquid applied systems

– Types of liquid systems

– Characteristics

– Regulations

– Environment

– Roof designs

• Appraise liquid applied systems

– Case studies

• Review Objectives

OBJ EC TIVES OF TODAY ’ S CP D SEMINAR

• A ‘flat roof’ is defined in UK Codes as a roof which

has a pitch of 10 degrees or less

• Flat roofs are characterised by having a continuous waterproof layer

• Roof plane can be simple or complex with multiple

interfaces such as roof-mounted plantSource: bre.co.uk

FLAT ROOFS

Characteristics

What are the features of cold applied liquid roofing?

• Seamless

• Cold applied

• Durable

• Fully bonded

• Minimum disruption

• Quick curing

• Easily detailed

• Specification range

L IQUID AP P LIED SYSTEMS

For each of these we will try to explain:

What is it?

What are its properties?

Where is it best utilised?

How is it detailed and specified?

TYP ES OF L IQUID AP P LIED SYSTEMS

What systems are avai lable to the Specif ier?

Glass re inforcedres i l ient po lyesters

F lex ib le unsaturatedpo lyesters

Po lyurethanes

POLYROOF 185 ELASTEXPROTEC

System cross-sections

Flexible Polyester

Polyurethane

Resilient Polyester

System cross-sections

Flexible Polyester

Polyurethane

Resilient Polyester

• Flexibility & Toughness

• Resistance to foot traffic

• Workability

• Fire Retardant

• UV Resistant

Resilient Polyester

Physical properties of l iquid systems

PolyurethaneFlexible Polyester

Resilient Polyester Flexible Polyester Polyurethane

Balcony Yes Yes No

Colours Full BS range Full BS range Grey

Substrate Plywood only Most Substrates Most Substrates

Roof size Any Any Medium / Large

Cure mechanism Catalyst Catalyst Moisture

Max. guarantee 20 years 20 years 20 years**

Approvals BBA BBA & FM BBA

Guarantees up to 20 years

Durability clauses from 20 to 30 years

Low maintenance

Life cycle costing

Building Regulations Approved Documents:

• Part L: Conservation of Fuel and Power

• Part B: Fire Safety

• Part K: Protection from Falling…

British Standards:

• BS 476 (fire test for roofing membranes)

• BS 5250 (control of condensation for roofs)

• BS 5268 (structural timber roofing deck)

REG ULATIONS AND STANDARDS

Part L: ‘Conservation of Fuel and Power’

• Current Approved Document Part L came into force

October 2010 (Amendment 2013)

• Measures to make buildings more energy efficient and

reduce CO2 emissions

• Relevant to roofs as need to be appropriately insulated

and sealed to meet thermal performance criteria

• Roof design needs to incorporate appropriate insulation

levels – options for warm / cold / inverted designs

Building Regulations Approved Document – Part L

Part L1A and L1B

L1A/L2A New Build• No Set U-Value

• Whole Building Calc

• Guideline U-Value 0.13 W/m2K

• Approx. 175mm Insulation (Warm Roof)

L1B/L2B Existing Buildings• Refurbishment of existing roofs (if stripped) and extensions

• Target U-Value 0.18 W/m2K

• Approx. 120mm Insulation (Warm Roof)

• However, if the existing waterproofing is retained and over-coated this constitutes a “repair” and is therefore exempt

*Above is an indication only and is based on a typical warm roof design.

The above will vary depending on the exact construction and it is advised

that specific calculations are obtained for any particular project.

Typical insulation thickness requirements

U-Value TR26 LPC/FM Rock Fibre

0.25 85mm 145mm

0.225 100mm 165mm

0.20 110mm 185mm

0.18 120mm 205mm

0.16 140mm 230mm

0.14 160mm 260mm

0.12 180mm 305mm

Part K: ‘Protection from Falling, Collision and Impact’

• Part K sets standards for the safety of stairways, access ways, ramps and

ladders, together with requirements for protection to prevent falling.

Also included are requirements for the guarding and warning of hazards

• Part K section on ‘falling’ particularly relevant in terms of potential

maintenance and roof access issues

• Requirement for dedicated roof access route and safety system guarding

/ handrail protection, minimum 1100mm high and / or fall protection

system

• Roof design needs to incorporate appropriate fixing details for

guarding support, fall protection and dedicated anti-slip maintenance

Building Regulations Approved Document – Part K

European Standardsand European

Technical Approval

Insurance / FM Approval

British Board of Agrément

Product specific third party accreditations

Material

• Materials Safety Data Sheets

• Class 3, Packing Group 3

Application

• No naked flames

• Limited manual handling

• Quick, safe application

Health & Safety considerations

• Sustainability through life cycle costing

• Waterproofing existing constructions to reduce waste

• Repeat waterproofing

• Constant analysis of supplier networks

• Investing in resin technology

ENV IRONMENT

Key environmental focus points

Source: bre.co.uk

SP ECIF ICATION CH ECKLIST

Specifiers or Designers must:

1. Fully understand the characteristics and limitations of individual

options

2. Select the correct material appropriate to that location / situation

and particular building

3. Ensure that correct and appropriate standards of workmanship

are carried out

4. Ensure that planned inspection and maintenance takes place

Therefore the key to a successful roof is:

• Specification

• Installation

• Maintenance

SP ECIF ICATION CH ECKLIST

FLAT ROOF D ES IG N

Cold Roofs

This construction relies on a minimum 50mm unobstructed void and an adequate cross-flow of ventilation.

FLAT ROOF D ES IG N

Warm Roofs

FLAT ROOF D ES IG N

Protec Warm Roof

• Cold liquid-applied direct to insulation

• No costly carrier layer or priming

• Quickly cures to form a seamless waterproof membrane

• Rapid installation with minimum disruption – saving time and money

• Lower odour due to a 40% reduction in VOC emissions

• Highly flexible – 75% increased elasticity

• 20 year insurance-backed guarantee

• Balcony Version Available

• Upgrade thermal performance to current regulations

• Minimal disruption

• No stripping; no landfill waste

• Reduce heat loss and carbon emissions

• BBA approved

FLAT ROOF D ES IG N

Environmental Considerations

• Combines reliable insulation with effective drainage

• Helps achieve Building Regulations compliance

• Can accommodate many fall requirements

• Combines various materials to suit different requirements

• Creates improvements in construction schedule

FLAT ROOF D ES IG N

Tapered Insulation

FLAT ROOF D ES IG N

Tapered Insulation

• Continuous tongue and groove top layer to provide a better finish

• Cost-effective and thermally efficient tapered insulation base boards providing falls (subject to minimum thickness)

Double Layer

Bond Area = 2x Roof

FLAT ROOF D ES IG N

Inverted Roofs

FLAT ROOF D ES IG N

Roof Refurbishment

FLAT ROOF D ES IG N

How are l iquid systems detai led?

FLAT ROOF D ES IG N

Finishes – Resi l ient Polyester

Green Roof Benefits:

• Environmental benefits

• Alleviate flooding

• Noise reduction

• Thermal insulation

• Natural habitat for wildlife

• Improving aesthetics

Polyroof Waterproofing System Benefits:

• Tough and durable membranes

• Maximised life cycle costing

• Seamless finish

• Fully root resistant

FLAT ROOF D ES IG N

Green Roofs

FLAT ROOF D ES IG N

Green Roofs

FLAT ROOF D ES IG N

Green Roofs

There follows a number of Case Studies highlighting

the versatility of liquid applied roofing systems including:

NEW BUILD ROOFS

CASE STUD IES

REFURBISHMENT COMPLEX

BALCONIES & TERRACES LEAD & COPPERGreenGREEN

CASE STUD IES

Castle Quays, St Helier (Dandara)

CASE STUD IES

Esplanade, St Helier (Dandara)

CASE STUD IES

The Forum, St Helier (Dandara)

CASE STUD IES

Durham University, Gateway Project

CASE STUD IES

Durham University, Gateway Project

CASE STUD IES

St Ninians, Dumfries

CASE STUD IES

JG Woodlands Centre, Sheffield

CASE STUD IES

New Build Flat Roofs

CASE STUD IES

Landmark Buildings

CASE STUD IES

Empire State Building, New York

Blackpool Tower

Belfast Concert Hall

Manchester Airport

Terrace Yard, Richmond

CASE STUD IES

The White Horse Pub, Havre Des Pas

CASE STUD IES

Headlands School, Bridl ington

BEFORE

CASE STUD IES

St Luke’s Primary School, Scunthorpe

BEFORE

CASE STUD IES

Education

CASE STUD IES

Antrim Road, Belfast

CASE STUD IES

Cherbury Court, Booterstown, Dublin

CASE STUD IES

Schering Plough Pharmaceuticals , Wicklow

CASE STUD IES

Dublin Airport - Safety Crit ical Refurbishment

CASE STUD IES

Commercial Works

CASE STUD IES

Guernsey Power Station

CASE STUD IES

Princess El izabeth Hospital , St Peter Port

CASE STUD IES

The Beehive, Rohais

CASE STUD IES

Glenwood, Coutanchez Road, St Peter Port

CASE STUD IES

Crawford Art Gallery, Cork

Before

Ropetackle, a Berkeley Homes development in Shoreham-by-the-Sea is an example of truly sustainable development.

Utilising Polyroof systems to waterproof various areas of the complex, the development achieved an ‘Excellent’rating from BREEAM, the international environmental assessment for buildings.

Ropetackle, Shoreham-on-Sea

CASE STUD IES

Refurbishment of Flat Roofs

CASE STUD IES

Refurbishment of Flat Roofs

CASE STUD IES

Complex Flat Roofs

CASE STUD IES

Box and Valley Gutters

CASE STUD IES

Balconies and Terraces

CASE STUD IES

Green Roofs

CASE STUD IES

Lead Reproduction

CASE STUD IES

Coating of Pitched Roofs

CASE STUD IES

• Review of flat roofs

• Introduce liquid applied systems

– Types of liquid systems

– Characteristics

– Regulations

– Environment

– Roof designs

• Appraise liquid applied systems

– Case studies

• Review Objectives

OBJ EC TIVES OF TODAY ’ S CP D SEMINAR

Thank you

REV IEW OF OBJ EC TIVES

Questions & Answers

Polyroof

Polyroof website: www.polyroof.co.uk

Regulations and Standards

Building Regulations Approved Documents: www.planningportal.gov.uk

Building Research Establishment (BRE): www.bre.co.uk

British Standards Institute (BSi): www.bsi-global.co.uk

Trade Associations

Liquid Roofing & Waterproofing Association (LRWA): www.lrwa.org.uk

National Federation of Roofing Contractors (NRFC): www.nrfc.co.uk

REV IEW OF OBJ EC TIVES

Further Sources of Information

New Milton Development

CASE STUD IES

Liquid solutions for flat roofs polyroof products limited - online version

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