History of Housing
Traditional Timber
The Beginnings of the Tradition
The Development of the ‘Framed Wall’
From Trees to Timber
Timber Frame Types
Construction Elements
Print version
300 Years - Style
Georgian Architecture - Introduction
Georgian Architecture - Theory of Design
Georgian Architecture - Developments
Regency
Victorian Architecture - Introduction
Victorian - Style
Late Victorian and Edwardian Architecture - Change
Between the Wars, 1918-1939 - Part One
Between the Wars, 1918-1939 - Part Two
Between the Wars, 1918-1939 - Part Three
Post-War Housing, 1945-1960s - Introduction
Post-War Housing, 1945-1960s - Flats
Post-War Housing, 1960s Low Rise
Print version
Old Services
Introduction
1850s - Middle Class
1850s - Working Class
Late 19th century - Middle Class
Late 19th century - Working Class
Conclusion
Print version
Council Housing
Introduction
Before Council Housing
Homes for Heroes
Inter-war Slum Clearance
Meeting the Post-war Housing Shortage
A New Urban Vision
Pushing the Boundaries and Housing All
The Impact of the ‘Right to Buy’
The Future of Council Housing
Print version
20th C Elements
Foundations
External walls
Ground Floors
Upper Floors
Roof Structure
Windows
Print version
20th C Periods
House Ages - early 1900s
House Ages - 1930s
House Ages - 1950s and 1960s
House Ages - 1980s
House Ages - early 21st century
Print version
Cottage 1900
Introduction
Specification
Print version
Building Regs.
Nature & Scope
Introduction - History of Building Control
A Brief Explanation of the Building Act
How to comply with the requirements of the Building Regulations.
How materials and workmanship are assessed for compliance with the Regs.
Common Questions
Print version
Foundations
Introduction
Design Generally
Design - Foundations & Drains
Print version
Walls
Wall Height, Strength, Loading etc.
Resistance to Moisture
Wall Restraint
Sound and Fire
Print version
Floors
Ground Floors - Introduction
Ground Floors - Ground bearing slabs
Ground Floors - Suspended concrete
Ground Floors - Suspended timber
Upper Floors - Structure
Upper Floors - Sound and Fire
Print version
Roofing
Introduction
Roofs and Fire
Insulation and Ventilation
Weather Resistance
Flue Construction
Print version
Insulation & SAPS
Conservation of Fuel and Power - Building Regulations 2006
SAP Ratings
Print version
Services
Foul Drainage - Above Ground
Foul Drainage - Below Ground
Rainwater Disposal
Waste Water and Cesspools
Drainage - Miscellaneous
Electrical Installations
Water Regulations (not part of B. Regs)
Print version
Foundations
Site Investigation
Site Investigation - Introduction
Desk Study
Walk-over Survey
Ground Investigation
Soils - (Subsoil)
Soil Identification - based on BRE Digest 64
Allowable Bearing Pressure - Adapted from BS 8004: 1986, Table 1
Print version
Ground Problems
Potential Hazards
Mining - Overview
Mining - Coal
Mining - Metals
Mining - Other Minerals
Building on Existing Filled Sites - 1
Building on Existing Filled Sites - 2
Trees - Part One
Trees - Part Two
Print version
Concrete
Introduction
A Brief History of Concrete
Properties
Specification
Print version
Founds - Type & Choice
Foundation Types
Foundation Choice - A Simple Guide
Print version
Strip Foundations
A Brief History
Summary
Choice - Strip or Trench-fill?
Checking Levels
Foundation Sizes
Widths - from Table 7, BS 8103 Part 1: 1995
Summary - Part One
Summary - Part Two
Potential Problems
Examples
Print version
Piles, Pier & Rafts
Piling - Introduction
Piling - The Choice
Pre-cast Piles (with insitu ground beam)
Augered Piles
Continuous Helical Displacement Piles
Insitu Ground Beams
Piers
Case Studies
Repair Systems - Roger Bullivant
Rafts
Print version
Resources
Drawing
Sequences
2D and 3D Animations
Panoramas
Video Clips
Revision
Test
Walls
Terminology
Introduction
General terms
Terminology - Gothic
Terminology - Classical
Print version
Bricks & Brickmaking
Bricks - Introduction
Six Brick Buildings
Clay Bricks
Concrete Bricks
Durability of Clay Bricks
Special Bricks
Special Bricks - Example
Print version
Blocks & Blockwork
Concrete Blocks - Introduction
Dense Concrete Blocks
Lightweight Concrete Blocks
Aerated Concrete Blocks - Aircrete
Aerated Concrete Blocks - Properties and Mortar Mixes
Aerated Blocks - Practice
Sound Insulation: Party Walls & Partitions
Print version
Stone & Stonework
Introduction
Six Stone Buildings
Stone - The Material
Stone Quarrying
Carving Stone
Rubble Work
Dimensioned Stone
Stone - Defects
Stone - Repairs
Tracery Example
Print version
Mortar
Introduction
Lime Mortars - Early Uses
Lime Mortars - Manufacture & Chemistry
Modern Mortars - Introduction
Modern Mortars - Principles
Working with Mortar on Site
Jointing and Pointing
Print version
Solid Walls
Introduction
English Bond
Flemish Bonds
Other Bonds
Early DPCs
Brick Arches
Print version
Cavity Walls
Introduction
Early Cavity Walls
Early Cavity Walls - Head, Sill and Jamb
Modern Cavity Walls - Generally
Modern Cavity Walls - Wall Ties
Movement Joints
Cavity Wall Tie Failure
Modern Cavity Walls - Jambs
Modern Cavity Walls - Lintels
Modern Cavity Walls - Sills
Modern Cavity Walls - Parapets
Print version
Insulation
Introduction
Simple U value calculation
Typical U values
Code for Sustainable Homes Levels 3 and 4
Insulating Cavity Walls
Wall insulation - internal or external
Dry Lining - Rockwool Liner Board
External Insulation - Rockwool RockShield
Cavity Fill - Blown Insulation
Print version
Resources
Drawing
House Drawings
Sequences
Video Clips
Revision
Test
Floors
Timber
Ground Floor - 1890s
Ground Floor - 1920s-1960s
Ground Floor - Modern
Upper Floors - pre 19th century
Upper Floors - Victorian
Upper Floors - Modern - Cut Joists
Upper Floors - Modern - Metal web joists
Upper Floors - Fire & Sound
Print version
Ground-bearing slabs
Principles
Early Floors
Modern Floors & DPMs
Hardcores
Insitu Concrete
Floor Finishes
Insulation Principles
Insulation Practice
Ground-bearing Floor - Case Study
Print version
Pre-cast concrete
Introduction
Pre-cast Ground Floors - One
Pre-cast Ground Floors - Two
Pre-cast Upper Floors
Early 'Fire Resisting' Floors
Print version
Resources
Drawings
Sequences
Video Clips
Revision Papers
Tests
Roof Structure
Terminology
Roof Structure - Terminology
Medieval Roofs
Print version
Cut Roofs
Introduction
Lean-to Roofs - Simple
Lean-to Roofs - Less Common
Eaves Details - Simple
Eaves Details - Less Common
Verge Details
Simple Traditional Roofs
Simple Purlin Roofs
Complex Purlin Roofs
Complex New Roofs
Some Examples of Older Traditional Roofs
Print version
Trussed Rafters
Introduction
Examples of Different Types
Manufacture
Fixing
Bracing
Restraint Strapping
Support for Tanks
Complex Roofs
Print version
Resources
Drawing
Sequences
Panoramas
Video Clips
Revision
Test
Roof Coverings
Terms & Materials
Materials
Terminology
Print version
Felt & Batten
Early Felts (Underlays)
Modern Felts
Some Felt Details
Battens & Counter-battens
Print version
Slate
Introduction
Natural Slates - Materials
Natural Slates - Laying - Part One
Natural Slates - Laying - Part Two
Natural Slates - Details
Stone Slates
Artificial Slates
History of the Slate Industry
Geology and Extraction
The Present Day
Print version
Plain Tiles
Introduction
Materials etc.
Fixing
Some Details from Eternit's Technical Guide
Shingles
Print version
Single Lap Tiles
Introduction
Pantiles
'Romans'
Interlocking Tiles - One
Interlocking Tiles - Two
Dry Fixing Systems - Marley
Redland Dry-tech
Some Details from the Redland Guide
Print version
Flashings
Introduction
Abutment Flashings - Double Lap Coverings
Abutment Flashings - Single Lap Coverings
Valleys and Gutters
Chimney Flashings
Print version
Ventilation
Ventilation and Insulation - Principles
Insulation at Ceiling Level
Insulation at Rafters Level
Insulation over Rafters
Ventilation Systems from Marley
Redland (Lafarge) Systems
Print version
Resources
Sequences
Panorama
Video Clips
Revision
Tests
Finishes
Early Plasters
Introduction
Lime - The Material
Hydraulic Limes
Using Lime Plaster - Generally
Early Lime Renders and Stucco
Decorative Ceilings - Lime
Specifying Lime Plaster
Special Plasters
Ornamental Plasterwork
Plaster Specification - 1930s
Gypsum plaster - mid 20th century
Print version
Modern Plasters
Introduction
Gypsum Plasters
Gypsum Plaster - Preparation and Application
Cement and Lime based Plasters
Print version
P/Boards and Ceilings
Introduction
Drylining
Ceilings
Jointing, Finishing and Skimming
Print version
Partitions
Introduction
Early partitions - Studwork
Early Partitions - Blocks and Boards
Modern Block Partitions
Modern Timber Studwork
Metal Partitions
Proprietary Plasterboard Partitions
Print version
Rendering
Introduction
Materials
General principles
Backgrounds
Application
Finishes
Insulating Renders
Re-rendering example
Print version
Paint (old)
Victorian and Edwardian - Oil Paints 1
Victorian and Edwardian - Oil Paints 2
Victorian and Edwardian - Limewash and Distemper
Early to Mid 20th Century Paint
Lead Paint - Hazards and Legislation
Print version
Wallpaper
Origins
A Period of Innovation
Early Trade
Progress and Machine-made Papers
Health & Taste in Victorian Times
Influential Figures
Lincrusta & Anaglypta
New Markets
Amended from Rivington's Notes on Building Construction
The Manufacturing Process Today
Print version
Hot & Cold Water
Supply
Typical Treatment Works - Barrow, Bristol
Taste and Colour etc
Distribution & Connection
Print version
Pipes & Fittings
Introduction
Pipes
Pipe Jointing
Cold Water Tanks - Cisterns
Cylinders
Check Valves
Print version
Layout
Cold Water
Brief History of Hot Water
Local and Instantaneous Water Heaters
Vented cylinders
Unvented Hot Water
Glossary - a few definitions
Print version
Heating
General Information
Introduction - Early Central Heating
Fuels
Print version
Chimneys & Fires
Introduction
Chimneys & Fires - Evolution
Chimney Construction - Existing
Chimney Construction - new
Fuel (solid)
Chimney Inspection - Structure
Chimney Inspection - Dampness
Chimney Inspection - Operation
Chimney Inspection - Testing and Sweeping
Chimneys - Lining
Chimneys - Thermocrete Lining Systems
Chimneys - Steel Lining Systems
A Chapter from a Victorian text book
Print version
Central Heating
Gas and Oil Boilers
Gas and Oil Layouts
Solid Fuel Central Heating
Central heating - Controls
Radiators - An Introduction
Microbore & Underfloor Systems
Electric Heating
Print version
Electrics
History & Hazards
Brief History
Early Installations
Nature of Accidents
Hazards - Think SAFE
Print version
Modern Systems
Consumer unit
Circuits
Cables and flexes
Installation
Earthing
Sockets and Switches etc
Periodic Inspection Reports
Print version
Drainage
Sanitation History
Disease
Privies and Chamber Pots
Early Water Closets
Victorian Public Health Legislation
Personal Hygiene
Water Supply
Bathrooms
Modern Water Closets
Print version
Above Gd Drainage
Introduction
Traps and Siphonage
Two Pipe System
Single Stack Principles
Single Stack Practice
Print version
Below Gd Drainage
Introduction
Drainage Pipes
Joints
Drainage Fittings
Inspection Chambers and Access
Trenches and Bedding
Drainage Layouts
General - Design Requirements
Access Fittings - Design Requirements
Print version
Rainwater Drainage
Introduction
Rainwater Pipes - A Brief History
Modern Rainwater Systems
Print version
Treatment
A Typical Works
Cesspools and Septic Tanks
Print version
Resources
Drawing
Sequences
Print version
System Building
Timber Frame 1950s
Post War Timber Frame Housing
The 1957 Ideal Home Exhibition
Sections of 1950's Exhibition House
Print version
Timber Frame Modern
Substructure
Timber Frame Housing - Wall Panels
Timber Frame - Upper Floors & Partitions
Upper Panels and Roof
Timber Frame - Cladding - Brick
Timber Frame - Cladding - Supported Systems
Timber Frame Housing - Fire Protection; Party Walls
Timber Frame Housing - Typical Opening Details
Timber Frame Sequence
Timber frame Drawings
Print version
Concrete Low Rise
Introduction
Post-war Problems in the Building Trade.
Airey Houses - One
Airey Houses -Two
Cornish Houses
Reema Houses
Unity Houses
One or Two Other Low Rise Systems
PRC Houses - The Main Defect
The 1984 Housing Defects Act
Styro Stone (in situ concrete)
Tunnel Form
Print version
Concrete High Rise
Evolution
Types
In situ Concrete Frames
Cross Wall and Box Frame
No-Fines Systems - Part One
No-Fines Systems - Part Two
Panel Systems
Print version
Steel Systems
Quarry Hill Flats - One
Quarry Hill Flats - Two
Steel Houses - 1940s and 1950s
Surebuild - Walls, Floors and Roof
Surebuild - Internal Walls and Services
Modern Steel Framed Flats
Print version
Resources
Drawings
Sequences
Panorama
Panorama Answers
System Building - Revision
Video Clips
EPC & Energy Use
Principles
Heat Transfer
Thermal Insulation
Print version
U values & Heat Loss
Introduction
Simple U value calculation
Typical K values
Typical U values
Floor Insulation
More Complex U Values - Walls
Adjusting/Comparing U Values
Print version
Energy Perf Certs.
Introduction
Survey of 9 Smith Avenue
Site Survey Form
Energy Performance Certificate
RDSAP Documentation
Print version
Heating
Gas and Oil Boilers
Gas and Oil Layouts
Solid Fuel Central Heating
Central heating - Controls
Electric Heating
Improving Efficiency of Water-based Central Heating Systems
Print version
Ventilation
Introduction
Draughtstripping
Ventilation
Print version
Condensation
Introduction
How, where and why condensation occurs
Moisture generation
Condensation on Walls and Floors
Condensation in Roofs
Analysis
RH and Internal Surface Temperature
Interstitial condensation
Avoiding Condensation
Condensation Check List
Print version
Windows
Multiple Glazing
Options
Replacement Windows
Print version
Roof insulation
Introduction
Insulation at Ceiling Level
Insulation at Rafters Level
Print version
Floor Insulation
Introduction
Timber Floors
Concrete Floors
Print version
External insulation
Introduction
Cost & Savings
Suitability
Materials & Systems
Precautions & Detailing
Advantages and Disadvantages
Print version
Cavity insulation
Introduction
Guarantees
Filling Cavity Walls - Exposure and Cavity Thickness
Cavity Walls - Assessment
Filling Cavity Walls - Materials and Methods
History of Cavity Walls
Cavity Walls - Visible Problems
Cavity Walls - Potential Hidden Problems
Thermal Bridging & Condensation
Conclusions
Print version
Internal insulation
Introduction
Non Thermal Considerations
Test
Print version
Renewables - Intro
Introduction
General Concerns
Print version
Photovoltaics
Introduction
Implications
Print version
Solar Water Htg
Introduction
Implications
Print version
Wind power
Introduction
Implications
Print version
Ground Source HP
Introduction
Implications
Print version
Air Source HP
Introduction
Implications
Print version
Biomass
Introduction
Implications
Print version
Combined H&P
Introduction
Implications
Print version
Selection
Introduction
Calculating Your Own Costs and Savings
Costs & Savings Generally
Aspirations/Recommended Improvements
Print version
Trad Timber Frame
Evolution
Introduction
The Development of the ‘Framed Wall’
From Trees to Timber
The Joinery
Cross Frames, Bays and Roof Types
Frame Types - Box and Post & Truss
Frame Types - Aisled and Cruck
Setting-out, Marking-up and Manufacture
Elemental Constructional Details
Regional variation
Historical development
Conclusion
Print version
Style & Detail
Layout
Framing
Roof Types
Print version
Repairs
Introduction
Nature of Oak
Assessment & Analysis
Defects - One
Defects - Two
Defects - Three
Principles of Conservation
Conservation Principles Applied to Timber
Timber Repairs
Steel Repairs
Resin Repairs
Case Study One - The Wool Barn, Frampton-on-Severn, Gloucestershire.
Case Study Two - Barn at Silchester, Berkshire
Print version
Gothic
Evolution
Romanesque/Norman Period 1066 - 1175 (approx)
Norman Examples
The Early English Period 1175 - 1275 (approx)
Early English Examples
The Decorated Period - 1275-1350 (approx)
Some examples of the Decorated Style
The Perpendicular Period - 1350 - 1530 (approx)
Some Examples of the Perpendicular Style
Print version
Elements
Arches and Columns - Norman
Arches and Columns - Gothic
Vaults
Windows
Buttresses
Towers in Abbeys and Cathedrals
Parish Church Towers
Print version
Layout & Use
Church Layout
Areas within a Church
The Church; components and use by parishioners and clergy - Part One
The Church; components and use by parishioners and clergy - Part Two
Print version
Research
Research Sources
Getting Started
Temple Church Bristol
Bath Abbey - Some notes on its 'restoration' and research records
Print version
Masons
Introduction
Types of Mason
Print version
Three Cathedrals
Wells
Salisbury
Gloucester
Print version
Summary of video styles
Iron
Iron
A Brief History
Properties of Cast and Wrought Iron
Shaping iron
Surveys
Ethics
Repair techniques - Hot
Repair Techniques - Cold
Print version
Site Photos
Estate Photos
Foundations and Ground Floors
Walls
Upper Floors
Roofing
Internal
House Photos
Foundations and Ground Floors
Timber Frame
Upper Floors
Roofing
Cladding & Render
Internal Finishes
Services
Extension Photos
Foundations and Ground Floors
Walls, Upper Floor & Roof
Everything Else
Defects Photos
Cracking & Movement
Introduction
Defects - Movement and cracking - Page 1
Defects - Movement and cracking - Page 2
Defects - Movement and cracking - Page 3
Defects - Movement and cracking - Page 4
Defects - Movement and cracking - Page 5
Defects - Movement and cracking - Page 6
Interest - Movement & Cracking
Print version
Masonry
Introduction
Defects - Brickwork - Page 1
Defects - Brickwork - Page 2
Defects - Stonework
Interest - Brick
Interest - Stonework
Print version
Garden Walls & Stacks
Introduction
Garden walls - Page One
Garden walls - Page Two
Defects - Chimneys
Defects - Chimneys - Photos supplied by Chimney Care
Interest - Garden walls
Print version
Roofing
Roof Structure and Coverings
Roof Structure
Roof Coverings - Page One
Roof Coverings - Page Two
Roof Flashings
Interest - Roof Structure
Interest - Roof Coverings
Print version
Finishes
Introduction
Rendering - Page One
Rendering - Page Two
Print version
Dampness
Introduction
Dampness - Page One
Dampness - Page Two
Print version
Cracking
Substructure
Foundation Types - Old and New
Settlement
Subsidence - Introduction
Subsidence - Coal Mining One
Subsidence - Coal Mining Two
Subsidence - Other Mineral Extraction
Subsidence - Clay Soils and Trees
Heave
Other Ground Related Problems
Poor Workmanship
Print version
Superstructure
Introduction
Loading - General
Loading - Arches & Lintels
Wall Bonding
Moisture Movement & Shrinkage
Thermal Movement
Chemical Causes - Sulfate Attack
Chemical Causes - Wall-tie Failure
Chemical Causes - Carbonation & Rusting
Print version
Diagnosis
Introduction
Cracking - Recording
Cracking - Inspection
Cracking - Classification
Crack Monitoring & Ground Investigation
Crack Analysis - Introduction
Print version
Repair
Options
Underpinning - Part 1
Underpinning - Part 2
Print version
House Profiles
Victorian Villas
History - Introduction
History - Proposed Development
History - Post Development
Front Elevation
Rear Elevation
Room Use
Floor Construction
Main Roof - Structure
Extension Roof, Coverings & Stacks
Loft Extension - Structure
Loft extension - Finishing
Print version
Frederick St
Introduction
History - The Area
History - The House
Construction - Front Elevation
Construction - Rear Elevation
Construction - Main Roof
Construction - Ground Floor
Construction - Upper Floor
Layout - Ground Floor
Layout - Upper Floor
Layout - Roof
Print version
Madeley St
Introduction
Floor Plans
Guided Tour - Cellar and Ground Floor
Guided Tour - First Floor and Attic
Wall Construction
Floor Joist Layout
Roof Construction - Part One
Roof Construction - Part Two
Roof Construction - Part Three
Print version
Long St
Introduction
Elevations
Room Layout
Ground Floor Introduction
Ground Floor Plan
Upper Floor Construction
Roof Construction - One
Roof Construction - Two
Print version
Mill Lane
Introduction
The Design Process Part 1
The Design Process Part 2
Planning Permission
Getting a Builder's Estimate
Contract
Site Preparation & Foundations
Drainage Problems
Ground Floor
Superstructure - Walls
Superstructure - Upper Floor and Roof
Electrics & Plumbing
Cutting Through
Finishing Off
Print version
Frames - Evolution
Iron & Steel
Introduction - Loads and Stresses
Cast Iron - Manufacture
Cast Iron - Columns & Beams
Wrought Iron - Manufacture
Wrought Iron - Beams & Riveting
Early Steel Manufacture
Print version
Early Textile Mills
Introduction
Cromford Mill
Masson Mill
Early Lancashire Mills
Print version
Mill Evolution
Ditherington Mill - Early Fireproof Mill
Belper and Stanley Mills
Textile Mills - Evolution of Fireproof Floors
Textile Mills - Style and Size - One
Textile Mills - Style and Size - Two
Textile Mills - Power & Services
Brief Comparison of Mill Construction
Textile Mills Gallery - One
Textile Mills Gallery - Two
Design Guide - Theodore Sington - One
Design Guide - Theodore Sington - Two
Print version
Non-framed Bldgs
Introduction
Foundations
Loadbearing Walls - One
Loadbearing Walls - Two
Complex Timber Floors
Fireproof Floors
Roof Trusses
Flat Roofs - Asphalt and Bitumen Felt
Print version
1900 Case Studies
East Mill, Belper
East Mill - Old Photos
Bonded Warehouses - Introduction
Bonded Warehouses - Construction
Dawn Mill, Shaw - Part One
Dawn Mill, Shaw - Part Two
Print version
Pre-1950s Frames
Steel - Introduction
Steel Framing - One
Steel Framing - Two
Fireproof Floors - One
Fireproof Floors - Two
Concrete - Introduction
Concrete - Mixing and Placing
Concrete - Reinforcement
Cladding - Introduction
Cladding - Details
Print version
1930 Case Studies
Steel Framing - Nottingham Council Offices
Steel Framing - Lewis's, Leeds
Print version
Old Drawings
Introduction
Barton Street Factory
Imperial Tobacco Company Warehouse
Boot Factory
Pragnell's
Robinson Building
Print version
Shop Spec
Introduction
Specification
Print version
Frames - Modern
Structures intro
Introduction
Force & Reaction; Moments
Force and Stress
Vertical Support – Columns and Walls
Horizontal Support – Beams
Bending and Shear Failure in Beams
Beam Design & Shape
Struts, Ties and Trusses
Building Stability
Portal frames & Arches
Gallery One
Gallery Two
Gallery Three
Gallery Four
Gallery Five - Five High Buildings
Print version
Concrete Frames
Introduction - Advantages of Concrete
Options for Concrete Frames
Examples of Concrete Frames
Reinforcement - Introduction
Reinforcement - On Site
Formwork
Gallery - Formwork and Reinforcement
Pre-cast Concrete - Introduction
Pre-cast Systems - More Examples
Print version
Steel Frames
Introduction
Frame - Components
Frame Layout
Bracing & Fire Protection
Suspended Floors - One - Precast Floors
Suspended Floors - Two - Insitu Floors with Permanent Formwork
Portal Frames
Gallery One - 1960s to 1990s Multi Storey Frames
Gallery Two - Modern Frames
Gallery Three - University Building
Print version
Cladding
Introduction
Brick Claddings - One
Brick Claddings - Two
Infill Panels
Insulated Render Systems
Rainscreen Claddings
Curtain Walling
Gallery - Quiz
Print version
Flat Roofs
Introduction
Asphalt Roofs
Felt Roofs
Lead Roofs
Print version
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