loft-conversion

15 articles

• Dormer Window Construction: Flat-Roof Dormer Framing, Cheek Cladding, Lead Flashings and Planning Compliance
  Flat-roof dormer construction: framing sequence (trimmer joists, structural header, dormer rafters), Code 4/5 lead flashings at back gutter and stepped cheeks, cheek cladding options (lead, tile hanging, render, zinc), PD planning rules (no front dormers facing highway), warm vs cold flat roof waterproofing
• Hip to Gable Loft Conversion: Structural Implications, Planning Limits and Gaining Maximum Floor Area
  Hip to gable conversion: converting sloped hip end to vertical gable, PD on end-of-terrace/detached (not semi where hip remains), structural gable wall sequence, ridge extension, combined with rear dormer for maximum space, cost premium £5k–£15k, party wall triggers
• Loft Conversion Building Control Process: Full Plans vs Building Notice, Inspection Stages and Completion Certificate
  Loft conversion building control: Full Plans vs Building Notice (full plans recommended), 7 inspection stages, Building Safety Act 2022 (Registered Building Inspectors), regularisation for missing certificates, completion certificate importance for remortgage/sale
• Loft Conversion Building Regulations Overview: Parts A, B, C, F, L and K — What Each Covers
  Loft conversion Building Regulations overview: Parts A (structure), B (fire), C (damp), F (ventilation), K (stairs/guarding), L (insulation), and P (electrical) — what each covers, full plans vs building notice, and completion certificate importance
• Loft Conversion Electrical Requirements: New Circuit, Lighting, Heating and Part P Compliance
  Loft conversion electrical: Part P notifiable new circuit from consumer unit, RCBO protection, Grade D LD2 smoke alarm layout per BS 5839-6:2019, lighting and heating options, consumer unit capacity check, NICEIC/NAPIT self-certification routes
• Loft Conversion Fire Escape: Part B Requirements, Mains-Wired Smoke Alarms, Escape Windows and Sprinklers
  Loft conversion fire escape: Part B protected staircase (FD30 self-closing fire doors, 12.5mm plasterboard enclosure) vs escape window (0.33m² min clear opening, 450mm × 450mm min, ≤1100mm from floor), mains-wired interlinked Grade D1 alarms, and sprinkler alternative
• Loft Conversion Floor Structure: Strengthening Ceiling Joists, Introducing New Floor Joists and Deflection Limits
  Loft conversion floor structure: why existing ceiling joists fail (deflection limits L/360), sister joist method vs replacement, C24 joist sizing table (3.5m–5.5m spans), steel beam alternatives, Part E acoustic targets (45dB DnTw airborne, 62dB L'nTw impact), Building Control inspection stages
• Loft Conversion Insulation: Between-Rafter vs Over-Rafter, Cold Roof vs Warm Roof and Part L U-Values
  Loft conversion insulation: Part L1B 0.18 W/m²K target for warm pitched roof, PIR between-rafter + below/over-rafter options, vapour control layer placement, breather membrane requirement, avoiding spray foam, and airtightness obligations
• Loft Conversion Permitted Development Rights: Volume Limits, Hip-to-Gable Rules, Rear Dormers and Restrictions
  Loft conversion permitted development rights: 40m³ terraced / 50m³ detached volume limits, rear dormers, hip-to-gable, front dormer prohibition, rooflight conditions, designated area restrictions, and Lawful Development Certificates
• Loft Conversion Plumbing and En Suite: Gravity vs Macerator, Hot Water Supply and Venting
  Loft conversion en suite plumbing: combi vs unvented hot water options, gravity drainage minimum falls (1:45 soil, 1:80 basin/shower), macerator restrictions (not sole WC), soil stack extension, AAV placement per AD H, water pressure check at loft level
• Loft Conversion Structural Design: Steel Beam Sizes, Purlin Support, Ridge Beam and Structural Engineer Sign-Off
  Loft conversion structural design: new floor joist sizing (47×200mm C16), steel beam specification by a Chartered Structural Engineer, purlin support/removal options, ridge beam, padstones, trussed rafter complexity, and Party Wall Act triggers
• Loft Conversions and the Party Wall Act: When Notices Are Required for Notching Joists on a Party Wall
  Loft conversions and the Party Wall Act 1996: Section 2 trigger table for common activities (notching, beam bearing, tanking), 2-month notice period, surveyor appointment process, party wall award, flank wall vs party wall distinction, practical timeline impact
• Loft Stairs and Building Regs: Part K Requirements, Minimum Headroom, Rise, Going and Handrail Rules
  Loft stair Building Regs: AD K geometry (220mm max rise, 220mm min going, 2000mm headroom), alternating tread stair rules (42° max, 220mm wider tread), 1800mm headroom concession at stair edges, FD30S fire door requirement for 3-storey conversions, 100mm sphere baluster rule
• Mansard Roof Conversion: Design Principles, Planning Permission Requirements and Typical Build Sequence
  Mansard roof conversion: 72° near-vertical rear slope design, why planning permission is almost always required (not PD), London terraced house build sequence, cost £60k–£100k, materials matching conditions, fire escape requirements from mansard floor
• Velux vs Dormer Loft Conversion: Planning Risk, Cost, Headroom Gain and Which to Recommend
  Velux vs dormer loft conversion: planning risk comparison, headroom-by-pitch table, cost ranges (Velux £20k–£35k vs dormer £35k–£55k), usable floor area comparison, GPDO 2015 Class A/B conditions, decision framework by roof pitch and budget