Roof Construction Questions PDF

1. What are five factors that influence the choice of roof systems and coverings? Climatic conditions Insulation requirements Spans required Siting of services Aesthetics 2. How do climatic conditions affect the choice of roof coverings? Climatic conditions affect factors like: Choice of weather-re...

1. What are five factors that influence the choice of roof systems and coverings? Climatic conditions Insulation requirements Spans required Siting of services Aesthetics 2. How do climatic conditions affect the choice of roof coverings? Climatic conditions affect factors like: Choice of weather-resistant materials for areas with heavy rainfall Heat-reflective coverings for hot climates Insulated roofs for cold regions Wind-resistant designs for areas prone to strong winds 3. Define the term "eaves" in roof construction. The eaves are the lower edges of a roof that overhang the walls, providing protection against rainwater. 4. What is the purpose of a ridge in roof construction? The ridge is the highest horizontal edge where two roof slopes meet, providing structural stability and weather protection. 5. Differentiate between a hip and a gable roof. Hip roof: All sides slope downwards to the walls, usually in a pyramid or rectangular shape. Gable roof: Has two sloping sides that meet at the top to form a triangular shape. 6. What is the function of a fascia board in roof construction? The fascia board is attached to the ends of rafters and supports the guttering, protecting the roof and building from water damage. 7. Describe the purpose of soffits in roofing. Soffits cover the underside of the roof's eaves, protecting the structure from weather and providing ventilation to the roof space. 8. Explain the role of a wall plate in roof construction. The wall plate is a horizontal timber member placed on top of walls to evenly distribute the load from the roof and provide a base for fixing rafters. 9. What is a purlin, and where is it located in a roof structure? A purlin is a horizontal beam that supports roof coverings and transfers loads to the roof trusses or rafters. 10. Define the term "roof truss" and describe its significance. A roof truss is a structural framework of timber or steel used to support the roof, distributing loads evenly to the walls and providing structural stability. 11. What is the difference between a mono-pitch roof and a double-pitch roof? Mono-pitch roof: Has a single sloping surface. Double-pitch roof: Has two sloping surfaces that meet at a central ridge. 12. Describe a trussed rafter roof system. A trussed rafter roof system consists of pre-fabricated triangular frameworks that provide strength and stability for the roof structure. 13. What are typical features of flush eaves details in a pitched roof? Rafter ends aligned with the roof face Fascia board for finishing Soffits for underside protection Ventilation openings 14. What is the role of ventilation in roof spaces? Ventilation prevents condensation and mold growth by allowing air circulation, reducing moisture buildup in roof spaces. 15. How is waterproofing typically achieved at roof ridges? By using ridge tiles, ridge caps, or membrane seals to prevent water ingress at the roof's highest point. 16. Name two roof finishes suitable for flat roofs. Asphalt Bonded felt 17. What interlocking method is used for tiles to ensure water resistance? Overlapping tiles with interlocking edges ensure that water flows off the roof without seeping through. 18. What materials are commonly used for thermal insulation in roofs? Fiberglass Mineral wool Foam boards 19. Describe how bonded felt is used as a roof finish. Bonded felt is layered and adhered to the roof surface using bitumen to create a weatherproof and durable finish. 20. How can solar protection be integrated into roof finishes? Installing reflective roof coatings Using insulated roof panels Incorporating solar panels into the roof design