What is the difference between C16 and C24 timber?
What the strength class actually measures, when the stronger grade lets you span further, and why the sizing convention catches people out.
beginner12 min3 min read
Tools & Materials
What to buy, what to skip, and how to use it.
511 guides in Home & DIY
What is the difference between a try square, a combination square, a speed square and a framing square?
Five squares that look like they do the same job and do not. What each one is physically shaped to do, which two are worth owning first, and the one that is a saw guide rather than a marking tool.
beginner15 min4 min readWhat is the difference between redwood and whitewood timber?
The two names on almost every softwood price list in Britain, what species each one really is, and which jobs each is genuinely better at.
beginner8 min3 min readWhich bit holder do I need — magnetic, quick-change or extension?
Four small accessories that solve four different problems, and the difference between a holder that grips the bit and one that only holds the screw.
beginner8 min3 min readWhich caulking gun should I buy, and how do I stop it oozing?
Thrust ratio, rod type and the anti-drip mechanism are the three things that decide whether a gun is pleasant or infuriating — and none of them is on the front of the pack.
beginner12 min4 min readWhich door hinges do I need?
Matching hinge size, type and grade to the door's weight and duty, including when three hinges are needed and what a fire door demands.
beginner15 min3 min readWhich hinge do I need for a cabinet door?
Full overlay, half overlay and inset concealed hinges, the opening angle, and the two measurements to take before ordering a replacement.
beginner15 min3 min readWhich hinges do I need for a garden gate?
Tee hinges, band and gudgeon, and hook and band compared — which suits which gate weight, and why the fixing matters more than the hinge.
beginner20 min4 min readWhich mortar and concrete additives actually do anything?
Plasticiser, waterproofer, accelerator, retarder, frostproofer, fibres and SBR — what each genuinely changes, what none of them can do, and why the washing-up liquid trick keeps coming back.
intermediate12 min5 min readWhich type of MDF do I need?
Standard, moisture-resistant, flame-retardant, high-density and flexible MDF — what each is actually for, and the two that are usually a waste of money.
beginner9 min4 min readWhich type of concrete block do I need — dense, medium or aerated?
Three block families with very different strengths, weights and insulating properties — and the trade-off between what a block holds and what heat it lets through.
beginner10 min4 min readWhich type of nail do I need for the job?
Round wire, oval, lost head, ring shank, clout, panel pin and masonry nails — what each is shaped for and where each is wrong.
beginner15 min4 min readWhy did my drill bit blow out the back of the wood?
Why the exit face always tears, and the three ways to stop it — backing board, drilling from both sides, and easing off at the end.
beginner10 min3 min readWhy does my sandpaper clog up so quickly?
Soft resin, uncured finish and heat — why abrasive loads up, and the papers, extraction and technique that stop it.
beginner12 min3 min readWhy is a blunt blade more dangerous than a sharp one?
Force, control and where the tool goes when it slips — the mechanism behind an old workshop saying that turns out to be literally true.
beginner8 min3 min readWhy is there steel reinforcement in concrete?
Concrete is strong in compression and weak in tension, so steel is placed where the tension is. Where that is, why cover matters more than quantity, and why reinforcement rusting is a structural problem rather than a cosmetic one.
intermediate9 min4 min readWill the merchant cut sheet material to size for me?
Panel saw services at merchants and DIY sheds — what they will and will not do, the tolerance to expect, and how to give a cutting list that comes back right.
beginner15 min4 min readSpade bit, auger or Forstner — which do I need for a large hole in wood?
Three bits for big holes in timber, what each is genuinely good and bad at, and the one to reach for when the hole will be seen.
beginner12 min3 min readAre water filter taps worth fitting?
What a filter actually removes from UK mains water, the three configurations, and the running cost that decides whether it beats a jug.
beginner15 min5 min readCoach screw or coach bolt — which one do I need?
One threads into timber, one goes right through and takes a nut. Which the job actually allows, and why that decision changes the load the joint can carry.
beginner12 min3 min readDo I need reinforcing mesh or bar in a concrete slab?
What reinforcement actually does, why its position in the pour matters more than its presence, and the domestic cases where fibres or a movement joint are the better answer.
intermediate12 min4 min readDoes a wall need priming before tiling?
What primer actually does on each substrate, why PVA is the wrong product under tiles, and the surfaces that need sealing before adhesive touches them.
beginner20 min4 min readDoes someone need to foot my ladder?
Why footing is the last resort rather than the default, what it does and does not prevent, how to do it properly when there is no alternative, and the two better options most people never consider.
beginner10 min5 min readHow do I copy an angle that is not 90 degrees?
A sliding bevel copies an angle without ever measuring it in degrees. How to take an angle off a real corner, why a mitre in an out-of-square corner is cut at half the angle, and how to get that angle onto a mitre saw.
beginner20 min4 min read
Going deeper: MaterialWorld
Material properties, comparisons and suitability — paints, fillers, sealants, timber, tile, insulation.