Liquid solutions for flat roofs polyroof products limited - online version

FLAT ROOFS A GUIDE TO LIQUID APPLIED ROOFING SYSTEMS
Continual Professional Development Seminar
A GUIDE TO LIQUID APPLIED ROOFING SYSTEMS
A technical comparison of different flat
roofing 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
POLYROOF INTRODUCTION
NEW BUILD REFURBISHMENT GREEN CONSERVATION

From this……to this
POLYROOF 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
OBJECTIVES OF TODAY’S CPD 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 plant
Source: 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
LIQUID APPLIED 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?
TYPES OF LIQUID APPLIED SYSTEMS
What systems are available to the Specifier?
Glass reinforced
resilient polyesters
Flexible unsaturated
polyesters
Polyurethanes
POLYROOF 185 ELASTEXPROTEC

System cross-sections
Flexible Polyester
Polyurethane
Resilient Polyester

• Flexibility & Toughness
• Resistance to foot traffic
• Workability
• Fire Retardant
• UV Resistant
Resilient Polyester
Physical properties of liquid 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)
REGULATIONS 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
route
Building Regulations Approved Document – Part K

European Standards
and 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
ENVIRONMENT
Key environmental focus points

Source: bre.co.uk
SPECIFICATION CHECKLIST
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
SPECIFICATION CHECKLIST

FLAT ROOF DESIGN
Cold Roofs
This construction relies on a minimum 50mm unobstructed
void and an adequate cross-flow of ventilation.

FLAT ROOF DESIGN
Warm Roofs

FLAT ROOF DESIGN
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 DESIGN
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 DESIGN
Tapered Insulation

FLAT ROOF DESIGN
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
Area

FLAT ROOF DESIGN
Inverted Roofs

FLAT ROOF DESIGN
Roof Refurbishment

FLAT ROOF DESIGN
How are liquid systems detailed?

FLAT ROOF DESIGN
Finishes – Resilient 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 DESIGN
Green Roofs

FLAT ROOF DESIGN
Green Roofs

There follows a number of Case Studies highlighting
the versatility of liquid applied roofing systems including:
NEW BUILD ROOFS
CASE STUDIES
REFURBISHMENT COMPLEX
BALCONIES & TERRACES LEAD & COPPERGreenGREEN

CASE STUDIES
Castle Quays, St Helier (Dandara)
CASE STUDIES

Esplanade, St Helier (Dandara)
CASE STUDIES

The Forum, St Helier (Dandara)
CASE STUDIES

Durham University, Gateway Project
CASE STUDIES

St Ninians, Dumfries
CASE STUDIES

JG Woodlands Centre, Sheffield
CASE STUDIES

New Build Flat Roofs
CASE STUDIES

Landmark Buildings
CASE STUDIES
Empire State Building, New York
Blackpool Tower
Belfast Concert Hall
Manchester Airport

Terrace Yard, Richmond
CASE STUDIES

The White Horse Pub, Havre Des Pas
CASE STUDIES

Headlands School, Bridlington
BEFORE
CASE STUDIES

St Luke’s Primary School, Scunthorpe
BEFORE
CASE STUDIES

Education
CASE STUDIES

Antrim Road, Belfast
CASE STUDIES

Cherbury Court, Booterstown, Dublin
CASE STUDIES

Schering Plough Pharmaceuticals, Wicklow
CASE STUDIES

Dublin Airport - Safety Critical Refurbishment
CASE STUDIES

Commercial Works
CASE STUDIES

Guernsey Power Station
CASE STUDIES

Princess Elizabeth Hospital, St Peter Port
CASE STUDIES

The Beehive, Rohais
CASE STUDIES

Glenwood, Coutanchez Road, St Peter Port
CASE STUDIES

CASE STUDIES
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 STUDIES

Refurbishment of Flat Roofs
CASE STUDIES

Complex Flat Roofs
CASE STUDIES

Box and Valley Gutters
CASE STUDIES

Balconies and Terraces
CASE STUDIES

Green Roofs
CASE STUDIES

Lead Reproduction
CASE STUDIES

Coating of Pitched Roofs
CASE STUDIES

Thank you
REVIEW OF OBJECTIVES
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
LiquidRoofing&WaterproofingAssociation(LRWA): www.lrwa.org.uk
National Federation of Roofing Contractors (NRFC): www.nrfc.co.uk
REVIEW OF OBJECTIVES
Further Sources of Information

New Milton Development
CASE STUDIES

Liquid solutions for flat roofs polyroof products limited - online version

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