How do I work out which circuit a socket is on?
A methodical hour that produces a labelled board and a map of what is on which circuit, which turns every future fault from guesswork into a two-minute check.
beginner40 min4 min read
Home & DIY
Practical answers for repairs, cleaning, decorating and the household problems that turn up whether you planned for them or not. Written so you can start with what you already own.
2,154 guides
How much does a sheet of plywood, MDF or chipboard weigh?
Realistic weights for the common boards and thicknesses, what actually drives the difference, and how to work out any sheet from its density.
beginner6 min4 min readHow much gap should I leave for timber to move?
The practical allowances for panels, cladding, worktops and wide boards — and the four construction details that let timber move without anything breaking.
intermediate12 min4 min readHow much weight can a kitchen drawer actually hold?
What a runner's rating actually means, why a pan drawer full of cast iron is closer to the limit than it looks, and which part gives way first.
beginner10 min3 min readHow much weight will a picture hook actually hold?
Reading a hook's rating honestly, the two-hook rule, and why the hanging hardware on the back of the frame fails more often than the hook on the wall.
beginner10 min3 min readIs my security light a nuisance to the neighbours?
Where the line between a useful light and a statutory nuisance sits, how to test your own installation from next door's window, and what to do if theirs is the problem.
beginner30 min4 min readMy OSB got soaked in the rain — is it ruined?
What happens to OSB when it gets wet, why the swollen edges are the real question, and how to decide between drying it out and replacing it.
beginner15 min4 min readShould I put a water repellent on my outside walls?
How a breathable water repellent differs from a masonry paint or a sealer, the narrow situation where it genuinely helps, and the walls where it will make damp worse.
intermediate30 min3 min readShould I use a honing guide or learn to sharpen freehand?
What each method actually gives you, why the argument is less about purity than about repeatability, and the projection jig that makes a guide fast rather than fiddly.
beginner12 min4 min readThrough bolt, sleeve anchor or shield anchor — what is the difference?
Three heavy masonry anchors that look similar and set differently — how each grips, which suits a through-hole and which does not, and where none of them belongs.
intermediate15 min3 min readWhat are kitchen end panels and filler panels, and how do I fit them?
The three panels that turn a row of boxes into a fitted kitchen, how to scribe one to a wall, and why the gap you are filling is not a mistake.
intermediate2 hr4 min readWhat are wall ties, and how do I know if mine have failed?
Why a cavity wall needs ties at all, the horizontal cracking rhythm that gives failure away, and why this is a survey and a specialist repair rather than a repointing job.
intermediate15 min4 min readWhat is a bypass valve and why does my heating system need one?
The small loop or valve that stops a boiler pumping against a shut system, why it exists, and what happens when TRVs are fitted without one.
intermediate12 min4 min readWhat is main bonding and earthing, and does my house have it?
What earthing and main protective bonding actually do, how to see whether yours is present, and why plastic plumbing and kitchen refits so often break it.
beginner12 min5 min readWhat is resin bound paving, and is it right for my drive?
The difference between resin bound and resin bonded, what each needs underneath, and the questions to ask before commissioning either.
beginner25 min4 min readWhat is the difference between bonding, hardwall and multi-finish plaster?
Backing coats build the depth and finish coats give the surface — which background takes which, and why using the wrong one produces a wall that cracks or never sets.
beginner20 min4 min readWhat is the white powder coming through my painted wall?
Efflorescence is salt carried out of the wall by moisture, and it is a symptom rather than a decorating fault — the powder is telling you where water is going.
beginner30 min5 min readWhat is wet-and-dry paper for, and how do I use it?
The black paper that works with water — what it is actually for, which lubricant to use on which surface, and why using it dry throws away most of its advantage.
beginner20 min4 min readWhich pencils and paper do I actually need for drawing?
What the H and B grades mean, why a set of twenty is a waste, and the paper weight that stops everything buckling.
beginner15 min3 min readWhich treatment use class do I need for my timber?
The exposure classes that specify how heavily a piece of timber has been treated, what each one is for, and why buying the wrong one is a mistake you only find out about in four years.
beginner8 min3 min readWhich vice do I need, and how do I fit one to a bench?
Woodworking and engineer's vices do different jobs and mount differently. Why a woodworking vice sits flush with the benchtop, why it must be bolted rather than screwed, and the packing trick that stops the jaw racking.
intermediate1 hr 30 min6 min readWhy did my wall plug disappear into the wall?
A plug that vanishes means the drill has broken into a void — a cavity, a dry lining gap, a perforated brick or a hollow block. How to work out which, and what to do next.
beginner20 min3 min readWhy do my jigsaw blades keep breaking or bending?
Six causes, from forcing a turn to a worn guide roller — and why a blade that breaks in the same place every time is telling you which one it is.
beginner15 min3 min readWhy is everything still in inches, and how do I convert without getting it wrong?
Where imperial survives in British building — timber, pipe, fixings, plumbing threads and old houses — which numbers are real conversions and which are just names, and the rounding discipline that stops a conversion introducing an error.
beginner15 min4 min read
Going deeper: MaterialWorld
Material properties, comparisons and suitability — paints, fillers, sealants, timber, tile, insulation.
MaterialWorld is in development — GuideHQ covers the practical answers in the meantime.