How Many Logs Do I Need For Winter?

Running out of logs in the middle of a cold snap is a nuisance, but so is filling the garden with more wood than you can store. The honest answer to how many logs you need is that it depends on your stove, your home and your habits. The good news is that a few simple questions will get you to a sensible estimate, and a little planning takes care of the rest.

This guide walks through the factors that make the biggest difference, explains how logs are sold, and shows you how to plan, budget and order so you stay warm all winter.

The Short Answer

According to HETAS’s guide to how much wood you need for winter, most UK homes using a stove on cold evenings need somewhere between 1.5 and 3 cubic metres of seasoned hardwood for the season. HETAS puts a typical builder’s bag of logs at roughly 0.8 to 1 cubic metre, so that range works out at around two to three bulk bags, or a little more if your bags are on the small side.

Treat that as a starting point rather than a promise. A household that lights the stove every evening from October to March will sit at a very different point from one that has a fire at Christmas and the odd weekend.

What Affects How Many Logs You Need

Stove Output And Type

Stoves are rated by heat output in kilowatts (kW). A larger, higher-output stove running flat out will generally get through more wood than a small one, and an open fire loses much of its heat up the chimney. The Stove Industry Association points out that modern Ecodesign stoves use fewer logs to produce the same heat as an open fire, so the appliance itself matters as much as how big it is.

How Often And How Long You Burn

This is usually the biggest factor. A three-hour fire on a Saturday night and a stove that runs from teatime until bed every day are completely different demands. Be honest about your routine rather than your best intentions.

Insulation And Room Size

A well-insulated room holds its heat, so the stove can tick over gently once the room is warm. A draughty cottage with single glazing or high ceilings will keep asking for another log.

Main Heat Or Occasional Comfort

If the stove tops up your central heating on chilly evenings, the HETAS range above is a reasonable guide. If it is your main source of heat, you will need considerably more, and it is worth asking your stove installer or supplier for an estimate based on your appliance and home.

Wood Type

Hardwoods such as oak, ash and birch are denser and tend to burn for longer, while softwoods light easily but burn faster and give less heat, according to Wolverhampton Council’s stove and open fire guide. Mostly softwood means you will need a larger volume to cover the same evenings.

Moisture Content

Wet wood wastes energy boiling off water, produces more smoke and tar, and gives less heat. Defra advises only burning wood with a moisture content of 20% or less. Dry logs, whether kiln-dried or properly seasoned, go further. Our guide to the difference between kiln-dried and seasoned logs explains the options.

A Rough Rule Of Thumb By Usage

There is no official table for this, so the bands below are a rough rule of thumb based on the HETAS range, not a measured figure. Use them to pick a starting order, then adjust once you know your own habits.

• Occasional use (weekends, special occasions): towards the lower end of the range, or below it. One bulk bag may well see you through.
• Regular evening use (most evenings through the colder months): the middle to upper end of the range, so plan on two to three bulk bags.
• Main heat source (lit most of the day): likely to go beyond the range. Get a tailored estimate and order in stages so you can see how fast it goes.

The most reliable figure is your own. Note the date you start each new bag and you will know exactly how long one lasts in your home, which makes next year’s order easy.

Bulk Bags, Crates And Cubic Metres Explained

Logs are sold in several ways, and the numbers are not always comparable.

• Bulk bags (also called builder’s bags or tonne bags): HETAS puts these at roughly 0.8 to 1 cubic metre each.
• Crates: wooden crates or stillages, often stacked neatly. Sizes vary between suppliers, so always check the volume.
• Nets and small bags: handy for occasional use, but HETAS notes they cost more per cubic metre than buying in bulk.

The big catch is loose versus stacked volume. A cubic metre of logs thrown loosely into a bag has more air in it than a cubic metre stacked tightly, so a stacked load contains more wood than a loose one of the same size. When comparing offers, ask whether the volume quoted is loose or stacked, and compare like with like.

Planning, Ordering And Budgeting

Order Early

HETAS suggests buying between May and August, when prices tend to be lower and suppliers have more availability. Ordering early also gives you time to find storage space and avoids the scramble when the first frost arrives.

You do not have to buy everything at once. HETAS describes three approaches: buying a full season in one bulk delivery, buying smaller bags as you go, or a hybrid of a bulk order in spring or summer topped up with small bags in winter. The hybrid route suits many households, because it covers the core of the season without needing space for every log you might burn.

It pays to buy from someone local who can tell you exactly what you are getting. If you are in Lancashire, local suppliers such as Empress Fencing supply kiln-dried logs in Clitheroe and the Ribble Valley. Wherever you buy, our guide to what to know before you order log delivery covers the questions to ask first.

Budgeting For Your Winter Logs

The fairest way to compare prices is per cubic metre, on the same basis (loose or stacked), including any delivery charge. A cheap bag that turns out to be small, loosely filled or damp is not a bargain.

Buying in bulk is usually cheaper per unit than buying nets through the winter, though it means paying more up front. Unseasoned wood is cheaper again, but Defra’s advice is that freshly cut wood can need up to two years to dry, so it only saves money if you have the space and patience to season it yourself.

Once you know roughly how many bulk bags you need, multiply by the price per bag and add delivery. Spreading the cost with an early order and a smaller top-up later can make the total easier to manage.

How To Avoid Running Out

• Keep a buffer. Having logs left in spring is far better than running short in January, and dry, well-stored logs will keep until next winter.
• Store logs properly. Keep them off the ground, covered on top and open at the sides so rain does not undo the drying. Our guide to storing your winter log supply goes into more detail.
• Bring in only what you need. HETAS advises only bringing wood indoors that you will burn over the next two days, and keeping it a safe distance from the stove.
• Reorder at the halfway mark. When your store is half empty, place your next order rather than waiting for the last log.
• Look after the stove and chimney. A well-maintained stove burns more efficiently, and Defra recommends having your chimney swept at least once a year.

Quick Checklist

1. Decide whether your stove is for occasional comfort or everyday heat.
2. Start from the HETAS range of 1.5 to 3 cubic metres and adjust for how often you burn.
3. Check whether prices are quoted loose or stacked, and compare per cubic metre.
4. Order dry logs with a moisture content of 20% or less, ideally between May and August.
5. Make sure you have covered, ventilated storage ready before delivery day.
6. Note when you open each bag so next year’s estimate is spot on.

For more practical guides to the home and garden through the seasons, visit Beyond The Garden Gates.

Kaan Rassad

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