Better specifying – a checklist for

specifiersRoss Finnie

Sales Director SIG Design & Technology

8 steps to a #PerfectRoof

When a roof is not perfect

3 key stages to identify information required to select appropriate specifications

14 questions to identify the waterproofing system

Stage 1: Employers requirements & considerationsQuestion 1: Durability and design life

Stage 1: Employers requirements & considerationsQuestion 2: Guarantee period

Stage 1: Employers requirements & considerationsQuestion3: Sustainability

Stage 2: Design factors – Architectural considerationsQuestion 4: Aesthetics

Stage 2: Design factors – Architectural considerationsQuestion 5: Structure

Stage 2: Design factors – Architectural considerationsQuestion 6: Drainage

Insulation:-Need to considerVast Range of:-Manufacturers

Stage 2: Design factors – Architectural considerationsQuestion 7: Insulation and U-Values

Rockwool

Thickness availability compared to u value

requirements

Acoustic performanc

e

Compatibility with adjacent

layers

Different application

methodologies

Single layers or multi-layer

coordination with

upstand heights

cost

availability (especially after the fire in

Germany)

KnaufKingspan

Recticel

CelotexRockwool

Ecotherm

QuinthermXtratherm

Types

PIR- Polyisocyanurate

EPS – Expanded Polystyrene

XPS – Extruded Polystyrene

Facings

Foil Facin

g

Tissue FacingUn-faced

Cold Roof

Warm Roof

Inverted Roof

Construction TypesBallasted

BondedMechanically

Fixed

Applications

Vacutherm

Flat

Tapered

Board Types

Stage 2: Design factors – Architectural considerationsQuestion 8: Upstand heights

Stage 2: Design factors – Architectural considerationsQuestion 9: Interfaces with other elements

Stage 2: Design factors – Architectural considerationsQuestion 10: Cost

Stage 3: Main contractor considerations – how will it be installed?Question 11: Programming

Stage 3: Main contractor considerations – how will it be installed?Question 12: Sequencing

Stage 3: Main contractor considerations – how will it be installed?Question 13: Protection

Stage 3: Main contractor considerations – how will it be installed?Question 14: Cost

#PerfectRoof

3 key steps – 14 questions

Pick up your checklist now!