NHBC Chapter 7.2, Approved Document B

    Roof Inspection Checklist

    Top 20 Reportable Items (RIs) raised at roof inspections — covering truss bracing, membrane laps, batten gauge, and fire stopping.

    1

    Verify truss positions match layout drawing with correct centres and bracing specification

    2

    Check bracing (longitudinal, diagonal, chevron) installed per truss engineer design

    3

    Confirm felt / breathable membrane is correctly lapped (150mm horizontal, 100mm vertical)

    4

    Inspect tile batten gauge matches tile manufacturer specification with correct fixings

    5

    Check ridge, hip and valley details per manufacturer guidance with correct mortar / dry-fix system

    6

    Verify lead flashings and soakers are correctly dressed, code weight matches specification

    7

    Confirm soffit and fascia ventilation meets requirements (10mm continuous or equivalent area)

    8

    Check roof space insulation plan against design — no gaps, compression or missing quilt

    9

    Verify truss clips or framing anchors installed at correct positions to all bearing points

    10

    Confirm party wall fire stopping extends to underside of roof covering with no gaps

    11

    Check verge detail is correct — mortar bedded or dry verge system properly clipped

    12

    Verify water tank platform is correctly positioned and supported per truss engineer detail

    13

    Confirm any dormer / roof window construction matches structural design and is weathertight

    14

    Check valley tiles / trays are correctly cut and dressed with adequate side lap

    15

    Verify roof space pipework (SVPs, overflows) is correctly supported and insulated

    16

    Confirm vapour control layer (VCL) is installed where specified (warm roof construction)

    17

    Check any solar panel / renewable energy fixings have adequate weatherproofing detail

    18

    Verify roof ladder / walkway boards are fitted where specified for maintenance access

    19

    Confirm eaves detail — tilting fillet, felt support tray and bird comb correctly installed

    20

    Check all penetrations through roof covering (flues, vents, aerials) are correctly sealed

    Use this checklist live on site

    ProPlot's audit feature includes these roof checks as interactive helpers — tick items off, attach photos, and share reports with your inspector in one tap.

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