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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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• 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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
From this……to this
P OLYROOF SOLUTIONS
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• 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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• 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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING 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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
TYP ES OF L IQUID AP P LIED SYSTEMS
System cross-sections
Flexible Polyester
Polyurethane
Resilient Polyester
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
TYP ES OF L IQUID AP P LIED SYSTEMS
System cross-sections
Flexible Polyester
Polyurethane
Resilient Polyester
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• Flexibility & Toughness
• Resistance to foot traffic
• Workability
• Fire Retardant
• UV Resistant
Resilient Polyester
TYP ES OF L IQUID AP P LIED SYSTEMS
Physical properties of l iquid systems
PolyurethaneFlexible Polyester
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
TYP ES OF L IQUID AP P LIED SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Guarantees up to 20 years
Durability clauses from 20 to 30 years
Low maintenance
TYP ES OF L IQUID AP P LIED SYSTEMS
Life cycle costing
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
REG ULATIONS AND STANDARDS
Building Regulations Approved Document – Part L
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
REG ULATIONS AND STANDARDS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
*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.
REG ULATIONS AND STANDARDS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
REG ULATIONS AND STANDARDS
Building Regulations Approved Document – Part K
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
European Standardsand European
Technical Approval
Insurance / FM Approval
British Board of Agrément
REG ULATIONS AND STANDARDS
Product specific third party accreditations
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Material
• Materials Safety Data Sheets
• Class 3, Packing Group 3
Application
• No naked flames
• Limited manual handling
• Quick, safe application
REG ULATIONS AND STANDARDS
Health & Safety considerations
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• 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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Therefore the key to a successful roof is:
• Specification
• Installation
• Maintenance
SP ECIF ICATION CH ECKLIST
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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 ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
Warm Roofs
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• 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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• 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 ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
Area
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
Inverted Roofs
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
Roof Refurbishment
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
How are l iquid systems detai led?
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
How are l iquid systems detai led?
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
How are l iquid systems detai led?
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
Finishes – Resi l ient Polyester
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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 ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
Green Roofs
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
FLAT ROOF D ES IG N
Green Roofs
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
CASE STUD IES
Castle Quays, St Helier (Dandara)
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Esplanade, St Helier (Dandara)
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
The Forum, St Helier (Dandara)
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Durham University, Gateway Project
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Durham University, Gateway Project
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
St Ninians, Dumfries
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
JG Woodlands Centre, Sheffield
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
New Build Flat Roofs
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Landmark Buildings
CASE STUD IES
Empire State Building, New York
Blackpool Tower
Belfast Concert Hall
Manchester Airport
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Terrace Yard, Richmond
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
The White Horse Pub, Havre Des Pas
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Headlands School, Bridl ington
BEFORE
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
St Luke’s Primary School, Scunthorpe
BEFORE
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Education
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Antrim Road, Belfast
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Cherbury Court, Booterstown, Dublin
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Schering Plough Pharmaceuticals , Wicklow
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Dublin Airport - Safety Crit ical Refurbishment
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Commercial Works
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Guernsey Power Station
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Princess El izabeth Hospital , St Peter Port
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
The Beehive, Rohais
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Glenwood, Coutanchez Road, St Peter Port
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
CASE STUD IES
Crawford Art Gallery, Cork
Before
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Refurbishment of Flat Roofs
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Refurbishment of Flat Roofs
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Complex Flat Roofs
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Box and Valley Gutters
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Balconies and Terraces
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Green Roofs
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Lead Reproduction
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Coating of Pitched Roofs
CASE STUD IES
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
• 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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
Thank you
REV IEW OF OBJ EC TIVES
Questions & Answers
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
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
FLAT ROOFS A GUIDE TO L IQUID APPL IED ROOFING SYSTEMS
New Milton Development
CASE STUD IES