Paint or stain for a rough-sawn timber fence?

For a rough-sawn timber fence, a penetrating stain is usually the easier long-term choice, because it soaks in, needs no primer, and is maintained by simply recoating. Paint gives better UV protection and lasts longer between coats, but it takes a lot more product on rough timber and eventually needs scraping, and once a fence is painted, going back to stain means stripping every paling.

Neither is wrong. The mistake is choosing without thinking about the next ten years of maintenance.

How does each one behave on rough-sawn palings?

A stain goes into the timber; paint forms a film on top of it. On smooth dressed boards the difference is subtle. On rough-sawn palings, with their torn fibres and uneven surface, it matters a lot.

Stains are semi-transparent and penetrating, so the colour is absorbed and the grain still shows. The rough surface actually helps here: it takes up plenty of stain and hides the unevenness well. When a stain wears, it fades rather than peels.

Paint has to build a continuous film over all those fibres. Resene's guidance for rough-sawn and band-sawn timber says unpainted rough-sawn timber uses 30 to 40 percent more paint than flat-sawn or smooth board, and recommends a low sheen or matt paint because of the rough profile; its fence advice adds that a low sheen finish helps hide the imperfections of an older, weathered fence. When paint eventually fails, it cracks and flakes, and on a fence that means scraping between palings, rails and posts before repainting.

How do they compare side by side?

	Penetrating stain	Paint
Look	grain and texture show through	solid, even colour
Priming	the fence stain data sheet we checked needs no primer; check yours	a primer or self-priming paint is needed on bare timber
Product use on rough-sawn timber	heavy on the first coat	Resene says 30 to 40 percent more than smooth board
How it wears	fades gradually	lasts longer, then cracks and flakes
UV protection	less	better, according to Resene's fence advice
Maintenance	clean and recoat, more often	scrape, spot-prime and repaint, less often
Changing later	can generally be painted over after proper preparation	going back to stain means stripping to bare timber

How often will each one need doing?

Resene's fence advice says stains need recoating every two to three summers, and that paint lasts longer before it needs maintenance. For its Woodsman Landscape and Fence Stain specifically, the data sheet says to assess the need for a maintenance coat after three to four summers, depending on exposure and how many coats were applied. So the honest answer is that it depends on the product and how hard the sun and weather hit that fence.

The fence line facing north and catching full sun all afternoon will need attention before the shaded side boundary. Check both, not just the one you see from the deck.

Coverage on rough timber is worth knowing before you buy. That same stain's data sheet gives 10 to 12 square metres per litre for the first coat on dressed timber, but only 4 to 6 square metres per litre for the first coat on rough-sawn timber. Buy for the rough figure, or you will be back at the shop halfway down the fence.

The data sheet also says not to apply it below 10°C or when the temperature is likely to drop below that during drying, so a late-autumn weekend is not the time to start.

Why is switching from paint to stain so hard?

Because a stain has to soak into bare timber, and paint is a film sealing that timber off. The Woodsman Landscape and Fence Stain data sheet says it is not suitable over film-forming stains, let alone paint. Putting a penetrating stain over a painted fence does not work; the only way back is to strip or sand every paling, rail and post back to clean timber, which on a rough-sawn fence is slow, miserable work.

Going the other way, stain to paint, is far more forgiving. A weathered stained fence can be cleaned, primed and painted, following the paint maker's preparation steps for previously stained timber.

That asymmetry is the real decision. If you are unsure, start with stain: you can always paint later. You cannot easily un-paint.

Which one should you choose?

If you are still choosing a product, wood stain types explained sets out the options. As a rule, choose stain if:

• you want the timber to look like timber;
• you are happy to spend an afternoon every few summers recoating;
• the fence is long, and scraping it later would be a big job.

Choose paint if:

• you want a solid colour that matches the house trims;
• the fence takes harsh sun and you want the longest gap between coats;
• you accept that eventual maintenance will involve scraping.

Either way, prepare the fence properly first: kill moss and mould, wash it, and let it dry before any coating goes on. If the fence dates from the 1980s or earlier, Health New Zealand advises presuming it was painted with lead-based paint, so have it tested before sanding or stripping.

Is this a job worth paying someone for?

Usually not. Staining or painting a standard boundary fence is one of the most DIY-friendly exterior jobs there is, and a roller makes quick work of rough palings. Where it is worth getting help is a very long or steep fence, a fence you want stripped back from paint to stain, or when the fence is being done alongside the house, which is where our wood staining service comes in.

Our fence staining guide covers stain colours and application in more detail.

If you would rather hand the fence over, get in touch for a quote.