Why does my toilet cistern whistle or hiss when it fills?
Why a fill valve whistles, why the noise usually appears with age rather than suddenly, and the two fixes that work.
beginner30 min3 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
Why does my tumble dryer keep stopping mid-cycle?
A dryer that stops part way through is usually protecting itself or telling you a container is full — and both of those are more informative than they look.
beginner30 min5 min readWhy does my wood feel rough after the first coat?
Sanding bends fibres over rather than cutting them off. The first wet coat stands them up again and locks them there — and the fix takes five minutes if you do it at the right moment.
beginner20 min4 min readWhy does plaster crack diagonally from the corners of doors and windows?
The single most common crack in a British house, why it appears at exactly 45 degrees from an opening, and how to tell the harmless version from the one that needs an engineer.
beginner20 min4 min readWhy does the fuse in my plug keep blowing?
What a plug fuse is actually protecting, the four reasons it blows repeatedly, and why the answer is never a bigger fuse.
beginner15 min5 min readWhy does water collect in the bottom of my window frame?
The drain slots almost nobody knows about, how to find and clear them, and why this looks exactly like a failed seal but is not.
beginner20 min4 min readWhy does water come in under my front door?
The five reasons water gets past an external threshold, how to tell which one you have, and what actually stops it.
beginner1 hr 30 min4 min readWhy does wood shrink and swell?
Timber is hygroscopic and never stops responding to the air around it. What that means for width, thickness and length, and why almost every timber problem in a house traces back to it.
beginner10 min4 min readWhy has my basin come loose from the wall, and how do I fix it properly?
Why tightening the bolts is almost always the wrong response, what to put behind each wall type, and refixing the basin so it carries the load properly.
intermediate1 hr 30 min5 min readWhy has my hinge pulled out of the chipboard, and how do I repair it properly?
Why a bigger screw makes a chipboard hole worse, the glued hardwood dowel repair that actually holds, and the free alternative of moving the plate to fresh holes.
beginner45 min5 min readWhy has my masonry drill bit stopped cutting?
The four reasons a masonry bit stops making progress — blunt tip, hammer off, packed dust, or something in the wall it was never meant to cut.
beginner15 min3 min readWhy has my push-button toilet flush stopped working?
The four-part chain between a push button and a flush valve, tested in order — button, rod or cable, valve head, and the valve itself.
beginner30 min4 min readWhy has my silicone not cured or not stuck?
Old stock, contaminated surfaces, three-sided adhesion and cold — the reasons a bead stays soft, peels off or splits, and what each needs.
beginner30 min4 min readWhy is my grout full of tiny holes?
Pinholes are trapped air, and they come from how the grout was mixed and how it was worked into the joint rather than from the product.
beginner20 min2 min readWhy is my plywood delaminating?
Delamination means the glue between the veneers has failed, and the usual reason is that the board's bond class was never suitable for where it was used.
beginner30 min2 min readWhy is my radiator cold after putting it back on the wall?
Four things stop a radiator heating after decorating, and they happen in a predictable order. Working through them takes ten minutes and needs no tools beyond a bleed key.
beginner25 min5 min readWhy is my varnish full of bubbles and brush marks?
Bubbles in varnish come from four places, and shaking the tin is only the first. How to stop them forming and how to remove the ones already in the film.
intermediate40 min4 min readWhy is my waste disposal unit jammed or just humming?
A hum means power is reaching a jammed motor; silence means no power is reaching it at all. Two different faults, two different fixes, and the same isolation before either.
beginner30 min7 min readWhy is there a long straight crack across my ceiling?
A dead straight crack across a ceiling is almost always following something — a board joint, a joist, or a change in the structure. Reading which one, and why filling it does not work.
beginner30 min4 min readWhy is upstairs colder than downstairs?
The balancing, insulation and airflow reasons for an unevenly heated house, and which to address first.
beginner1 hr3 min readWhy is water getting under the rim of my kitchen sink?
Whether the sink has lifted, the bead has failed or the tap is the source, and how to reseal a sink rim so it lasts.
beginner1 hr 30 min4 min readWhy will my bath shower mixer not switch to the shower?
What a diverter actually does, why limescale and worn O-rings stop it, and how to service or replace one without touching the tap body.
beginner40 min3 min readWhy will my sliding patio door not lock?
Separating a sash that has dropped from hook bolts that have moved and keeps that have loosened — and why a sliding door's lock is far more sensitive to height than a hinged door's.
beginner40 min3 min readCan I stack a tumble dryer on top of a washing machine?
Yes, with a stacking kit made for the pairing — and the dryer always goes on top, because the washing machine is heavier and is the one that vibrates.
intermediate1 hr6 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.