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Advice library

Building advice, written from the tools

48 guides covering the faults we're called out to, the material choices we're asked about, the property types we work on and the commercial side of running a build.

Problems & repairs

Building problems and repairs explained

What's actually going wrong, how to tell a symptom from a cause, and what a lasting repair looks like rather than a cover-up.

Sagging floors and tired joists: what's really happening underneath

Homeowner has a bouncy or dipping floor and wants to know the cause and the fix.

Rotten timber windows: repair, splice or replace?

Owner of timber windows with soft or blown paintwork deciding between repair and replacement.

Doors that stick, drop or won't latch

Owner with a door that binds, drags or fails to latch and wants to know if it is serious.

Damp in solid-wall houses: diagnosis before treatment

Owner of an older solid-wall property with damp patches wanting a diagnosis, not a sales pitch.

Cracked and hollow render: patch or strip?

Owner with cracked external render deciding between local patching and a full re-render.

Leaking flat roofs: finding the actual entry point

Owner of a leaking flat roof over an extension, dormer or garage wanting a durable fix.

Woodworm and timber decay: active or historic?

Owner who has found flight holes or soft timber and needs to know whether treatment is needed.

Creaking stairs and loose handrails

Owner with a noisy or wobbly staircase wanting a repair rather than a replacement.

Bathroom leaks: when sealant is the symptom, not the cause

Owner repeatedly resealing a bath or shower and getting damp below or next door.

Overflowing gutters and the damage they cause

Owner with overflowing or leaking gutters wanting to understand repair vs replacement.

Cracks where an extension meets the original house

Owner seeing a crack at the join between an extension and the original building.

Condensation and black mould in loft spaces

Owner finding damp, mould or dripping nails in a cold roof space.

Materials & comparisons

Materials and building systems compared

Honest comparisons of the choices that change cost, lifespan and how a finished job feels to live with.

Oak or softwood for joinery: where each one earns its place

Homeowner specifying joinery and weighing hardwood against painted softwood.

Timber or UPVC windows: the honest comparison

Owner replacing windows and comparing timber against UPVC.

Timber, cedar or composite cladding: which weathering do you want?

Owner choosing a cladding material for an extension, outbuilding or elevation.

Warm roof or cold roof: the build-up that decides condensation risk

Owner or self-builder deciding on a roof insulation strategy.

Clay or concrete roof tiles: weight, weathering and cost

Owner re-roofing and choosing between clay and concrete tiles.

Underfloor heating or radiators: which suits your build-up?

Owner planning an extension or refurbishment and choosing a heat emitter strategy.

Block and beam or suspended timber ground floors

Self-builder or extension client choosing a ground floor construction.

Lime or cement mortar: why the wrong mix damages old walls

Owner of an older property considering repointing and unsure which mortar to use.

Kitchen worktops compared: quartz, granite, timber and laminate

Homeowner selecting a worktop material during a kitchen project.

Steel beams and timber lintels: what carries what

Owner planning to remove a wall or form an opening and wanting to understand the structure.

Wet room or shower enclosure: what changes below the tiles

Owner planning a bathroom and deciding between a wet room and a tray-based shower.

Rooflights or dormers: light, headroom and permission

Owner planning a loft conversion and choosing how to bring in light and headroom.

Property types & owners

Advice by property type and owner

Every building age brings its own constraints. These pages cover what changes when the property, not the project, sets the rules.

Working on a listed building without losing the plot

Listed building owner planning repairs or alterations and needing to understand the process.

Oast houses: the quirks of living in a converted farm building

Oast house owner planning repairs, upgrades or a conversion of unused space.

Weatherboarded cottages: keeping the skin sound

Owner of a weatherboarded cottage planning external repairs or redecoration.

Victorian terraces: the same five projects, again and again

Owner of a Victorian terrace planning renovation and wanting to know the usual scope.

1930s semis: the most improvable houses on the street

Owner of an interwar semi planning an extension or whole-house improvement.

New-build homes: snagging, upgrades and the things developers leave out

Recent new-build buyer planning upgrades, storage or garden works after moving in.

Landlords: specification that survives tenants and inspections

Landlord planning a void-period refurbishment or a compliance-driven upgrade.

Holiday lets: building work that has to fit between bookings

Holiday let owner planning upgrades that must fit around guest occupancy.

Barns and farm buildings: repair, re-use or convert

Rural owner with a barn or agricultural building considering repair or conversion.

Shop and café fit-outs: trading again as fast as possible

Small business owner planning a retail or hospitality fit-out.

Home offices and garden studios that work all year

Home worker planning a garden office or converting a room into a proper study.

Adapting a home to stay in it for the long term

Owner or family planning accessibility adaptations to remain in the home.

Costs & process

How building work is costed, run and handed over

The commercial and procedural side of building work, written for homeowners who have never run a project before.

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