Material selection
Compare metal sheets, PUF panels, shingles, uPVC and daylight roofing by building use—not sheet price alone.
- Weather and corrosion exposure
- Thermal and daylight priorities
- Roof slope, span and finish
ROOFING LEARNING CENTRE
Know what to ask before you choose what to buy.
Clear, practical roofing primers for homeowners, architects, contractors and project teams in Bengaluru and Karnataka.
Selection · Measurement · Insulation · Repair · Installation
START WITH THE RIGHT QUESTIONS
Six practical guides for a better first brief.
Use these primers to prepare a more useful conversation. Product-specific technical values must still be checked against the current manufacturer literature and quotation.
Preparing a quote
The dimensions, drawings, photos and site details that make a roofing estimate more useful.
- Actual sloping surface dimensions
- Project location and access
- Supply-only or installation scope
Heat and insulation
Questions to ask when indoor temperature, condensation and energy performance matter.
- Building occupancy and internal heat
- Insulation core and thickness
- Vapour and joint sealing
Leak diagnosis
Document symptoms systematically before requesting a roof-repair inspection.
- Leak location versus roof source
- Laps, penetrations and flashings
- Gutter and drainage condition
Roof accessories
Flashings, gutters, fasteners, sealants and tapes belong in the first material conversation.
- Compatible fastener and washer
- Ridge, verge and valley details
- Outlet and downpipe capacity
Installation planning
Access, storage, sequencing and safety considerations before roofing materials reach site.
- Unloading and safe storage
- Support readiness and tolerances
- Weather window and work sequence
HOW TO MEASURE ROOFING AREA
Use the surface, not only the floor plan.
For a simple roof face, multiply the actual sloping length by its width. Add all roof or wall surfaces, then allow for laps, cuts and site waste. Complex roofs should be divided into measurable rectangles or triangles and verified from drawings.
Choose a product and calculate area- MEASUREMeasure each actual roof or wall surface
Use feet for length and width. For pitched roofs, measure or derive the slope length.
- TOTALAdd all surface areas
Subtract large openings only when the product and installation method justify it.
- ALLOWAdd a planning allowance
Use 5–10% for simple surfaces and more for hips, valleys, angles and intricate cuts.
- VERIFYLet ReZa verify cover and quantities
Effective cover width, lap direction, stock length and flashing details affect the final order.
