Roofing

32 articles

• Asbestos in Roofing: Identifying ACM Cement Sheets, Slates and Safe Removal Obligations
• Chimney Repairs: Repointing, Flaunching, Lead Flashings & Cowls
  Chimney repairs: repointing mortar mix (NHL lime), flaunching replacement, lead flashing code, chimney pot and cowl options
• Dormer Construction: Structural Frame, Weathering, Building Regs and Planning
  Dormer construction: PD rights 40m³ detached/20m³ terraced, structural trimmer frame, GRP vs lead valley/cheek weathering, Approved Documents A/B/C/L compliance, party wall implications
• Dry Verge and Dry Ridge Systems: BS 5534 Mechanical Fixing and Mortar-Free Detailing
  BS 5534:2014+A2:2018 mandates mechanical fixing of all ridge/verge tiles; mortar-free dry ridge with roll-out roll and per-tile clamps; dry verge cap units screwed to gable batten; ventilation continuity at ridge per BS 5250; wind uplift calc per BS EN 1991-1-4
• EPDM Flat Roof Installation: Bonding, Edge Details and 50-Year Lifespan
  EPDM flat roofing: 1.14mm minimum membrane, 1:80 minimum fall, C2S2 contact adhesive, edge drip trim, BS 6229:2018 warm roof build-up, 50-year expected lifespan
• Fascia & Soffit Replacement: Materials, Ventilation & Access Equipment
  Fascia and soffit replacement: uPVC vs wood, vented soffits for cold roof ventilation, bargeboard fixing, lead soaker details
• Flat Roof Materials Compared: Felt, EPDM, GRP Fibreglass, Single-Ply and Liquid
  Felt 2-layer/3-layer vs EPDM vs GRP vs single-ply PVC/TPO vs hot-melt vs liquid PU comparison; BS 6229:2018 1:80 fall min (1:40 best); BS EN 13501-5 BROOF(t4) fire; selection by size + complexity + lifespan + foot traffic + aesthetic; warm vs cold roof; BBA Agrément for 30+ year warranty
• Flat Roof Repair Methods: Cold Liquid Applied, Torch-On Patch, EPDM Overlay and Infrared Survey
  Find ingress (not stain) via IR/capacitance survey; cold liquid PU/PMMA vs torch-on (Safe2Torch) vs EPDM overlay vs strip+recover; BS 6229 1:80 finished fall; wet insulation must be replaced; Part L on >25%
• Flat Roofing Options: EPDM, GRP, and Felt — Which to Recommend?
  Flat roofing comparison: EPDM, GRP, felt, single ply — lifespan, cost per m², insulation requirements, when to recommend each
• Green Roof Construction: Extensive vs Intensive, Drainage Layers & Structural Loading
  Green roofs: extensive (50–150mm, sedum) vs intensive (200mm+), drainage layer build-up, root barrier, mandatory fire breaks at floor levels, GRO Code loading
• Gutter and Downpipe Sizing: BS EN 12056-3 Rainfall Intensity Method, Outlet Positions, Half-Round vs Square Profile and Blockage Prevention
  BS EN 12056-3 design rainfall 75mm/hr (England), half-round 112mm gutter serves 47m² catchment, 68mm downpipe per 42m², outlet every 12m max, leaf guard and rodding access
• Guttering Guide: Sizes, Materials, Falls & Common Problems
  Guttering: half-round vs square-line sizing (BS EN 12056), fall gradient (1:600 min), joint sealing, common blockage points
• Lead Roofing Work: Code Numbers, Bay Widths, Welted Drips & Soakers
  Lead roofing work: Code 3–8 selection, maximum bay widths (500mm Code 5, 600mm Code 6), welted drip joints, soaker sizing formula, patination oil, BS EN 12588
• Leadwork on Roofs: Code Numbers, Flashings, Valleys and Step Flashing Specification
• Metal Roofing Systems: Corrugated Steel, Aluminium and Corten — Fixings, Laps, Falls and Building Regs
  Corrugated/box-profile steel, aluminium, Corten; fixings (primary/stitching, EPDM washers), side/end laps, min falls; condensation/anti-drip; sheet selection by span/pitch; Building Regs; complements zinc-roofing
• Pitched Roof Repairs: Replacing Tiles, Ridge Tiles, Lead Flashings & Valleys
  Pitched roof repairs: ridge tile repointing, plain tile/slate replacement, lead flashing dressing, valley repair methods
• Pitched Roof Structure: Couple, Close Couple and Purlin Roof Types, Rafter Sizing Tables, Birdsmouth Joint and Ridge Board
  Couple roof (≤5.5m span), close couple with ceiling tie, purlin roof with hanger/strut at 1.5m centres, rafter sizing from TRADA span tables, birdsmouth max ⅓ rafter depth
• Pitched Roofing Guide: Tiles, Slates, Underlay, Battens and Specification Rules
• Re-Roofing a House: Strip and Recover vs Overlay, Sarking Felt, Battens & Building Control
  Re-roofing: strip vs overlay decision, breathable underlay installation (150mm horizontal lap), BS 5534 mechanical fixings, 25×50mm battens minimum, Building Control notification >25% area, Competent Roofer scheme self-certification
• Roof Eaves and Verge Details: Fascia, Soffit, Bargeboard, Underlay and Ventilation Requirements
• Roof Insulation: Cold Roof vs Warm Roof — Methods, Materials & Condensation Risk
  Cold roof vs warm roof insulation: 50mm ventilated airspace, warm roof build-up, condensation risk, BS 5250, Approved Document L U-values
• Roof Moss and Algae Treatment: Biocide Application, Zinc Strip Prevention and Pressure Washing Risks
  Roof moss treatment: biocide BPR PT10 registered products, zinc strip 150mm wide, pressure washing risks on aged tiles, allow 6–8 weeks post-treatment for die-back before clearing
• Roof Safety: Edge Protection, Roof Ladders, Scaffold Boards and WAH Regulations
• Roof Tile Types: Concrete, Clay, Slate & Fibre Cement — Weight, Cost & Lifespan
  Roof tile types: concrete interlocking, clay plain, natural slate, fibre cement — weight, cost, lifespan, and BS 5534 fixing requirements
• Roof Ventilation: Eaves, Ridge & Tile Vents — Building Regs Requirements
  Roof ventilation: cold roof 1:150 free area at eaves, ridge vent equivalent, BS 5250 condensation risk, Approved Document C
• Roof Window Installation: Flashing Kit Selection by Pitch, Structural Header Requirements and Part L Compliance
  Roof window (Velux) installation: EDL/EDM/BFX flashing codes, structural trimmer/header joist, Part L ≤1.8 W/m²K, escape window minimum 540×1,000mm clear (MK04 insufficient — requires C04 or 78×118)
• Rooflights & Skylights: Planning Rules, Structural Openings & Flashing Kits
  Rooflights and skylights: PD rules (≤150mm protrusion), Velux flashing kit codes (EDL/EDM/BFX/BPX), structural header sizing, minimum pitch 15°, Part B escape window requirements
• Slate vs Concrete Roof Tiles: Weight, Lifespan, Cost Comparison and BS 5534 Fixing Requirements
  Slate 20-25kg/m² 80-150yr vs concrete 40-55kg/m² 40-60yr (load doubles); BS 5534:2014+A2:2018 mandatory mechanical fixing; BS 8612 dry-fix ridge/verge; min pitch; BS EN 12326 A1/S1/T1; conservation refusals
• Solar Panels on Roofs: Structural Loading, Roofer Responsibilities & Waterproofing
  Solar panels on roofs: 10–25 kg/m² loading, lead soaker penetration sealing (Code 4), tile hook systems, MCS installation requirement for SEG, PD rules (200mm max projection above roof plane)
• Standing Seam Metal Roofing: Zinc, Aluminium and Steel — Materials, Fixing and Lifespan
  Standing seam metal roofing: zinc BS EN 501 (2.2mm/m thermal expansion per 100°C), aluminium BS EN 506, steel BS EN 14782, fixed/sliding clip system, minimum 3° pitch
• When Does Roofing Work Need Building Control? A Job-by-Job Guide
• Zinc Roofing: Standing Seam, Code 14 Gauge, Thermal Expansion Allowance, Patina and LBCS Standards
  Standing seam / batten roll; thickness 0.7-0.8mm; thermal expansion allowance (clips, fixed/sliding); ventilated warm vs cold deck (corrosion underside); patina; min falls; complements leadwork and metal-roofing-systems