Exterior painting is a race against British weather, and most homeowners start thinking about it about one month too late. If you are weighing up exterior painting in Northampton, the first question is not what colour. It is when, because the window for a job that lasts is narrower than most people expect.

Get the timing right and the paint cures properly, bonds to the surface, and holds its colour for years. Get it wrong and you have paid for a job that peels within twelve months.

The weather window: April to October

In the East Midlands, the reliable season for exterior painting runs from roughly April through to October. The requirements are simple and non-negotiable:

  • Surface temperatures comfortably above 10 degrees Celsius, so the paint can cure rather than sit tacky
  • A dry forecast for at least 24 hours after application, and longer for masonry
  • No frost, which rules out the winter months entirely
  • Wind low enough that dust and grit are not sticking to fresh paint

Late spring and early summer are the sweet spot. September and early October work well too, while daytime temperatures hold and rain is less constant than November. Anything painted from November to March is a gamble, and exteriors are the one job where a lost gamble means starting again.

What exterior painting covers

Most Northampton exterior decorating projects involve some or all of the following:

  • Masonry and render. The main body of the house, usually in a masonry paint, which is thick, breathable, and made for the job. Render with hairline cracks needs filling first.
  • Timber fences. The most common weekend project, and the one where preparation is most often skipped. Fences want a preserver or stain rather than a film-forming paint in most cases, so the timber can breathe.
  • Garage doors. Constant sun on one side and weather on the other, so they need a flexible exterior paint and a proper key on the surface.
  • Fascias, soffits, and bargeboards. High, awkward, and impossible to do well without proper access equipment. Typically painted in exterior gloss or satin.
  • Garden walls and outbuildings. Brick, block, and render surfaces, often with algae that must be killed before anything is painted over it.

Preparation decides how long it lasts

Most exterior paint failures are not paint failures, they are preparation failures. The correct routine for an exterior surface is:

  1. Wash the surface, usually with a pressure washer, to remove dirt, chalk, and organic growth
  2. Treat any green algae or black spot with a fungicidal wash, and let it work for the full dwell time
  3. Scrape and sand back any flaking paint, feathering the edges so the repair does not show
  4. Fill cracks and patch damaged render, then let it dry thoroughly
  5. Prime any bare timber or porous patches, because new timber drinks paint at a different rate to old surfaces
  6. Apply two coats of the correct exterior product, in the right conditions

Skip the washing and the priming and you should expect peeling within a year, usually starting at the edges of window frames and along the top of walls, exactly where the weather hits first.

Five signs the exterior is due for painting

Paint tells you when it is failing, usually long before it starts to peel in visible strips:

  • Chalky dust on your hand after brushing against the wall, which means the surface is breaking down
  • Blistering or flaking paint, especially around window frames and along the tops of walls
  • Faded or greyed colour that no longer matches the original, which is UV and rain damage rather than dirt
  • Green algae or black spot on north-facing walls, which holds moisture against the render
  • Timber that has gone grey or started to feel soft, which means water is getting in and rot is close behind

Two or more of those signs together mean the surface needs more than a touch-up, and the sooner it is dealt with, the less preparation the job needs.

While the ladders are out

Exterior work is expensive largely because of access, so if the tower or ladders are going up anyway, that is the moment to deal with the rest of the outside list. Clearing and checking the guttering, washing down the drive and patio, and treating decking before winter are all cheaper when they share the same access. Bundling jobs into one visit is one of the few places where home maintenance genuinely discounts itself.

What it costs in Northampton in 2026

Exterior work is usually priced at a day rate of £180 to £280, with materials on top. As a guide, a typical three-bedroom semi exterior, including preparation, takes between three and five days, so expect a full exterior repaint in the region of £900 to £1,800 plus materials, depending on access, height, and how much repair the render needs.

Fence runs are simpler. A long boundary fence of around 20 panels typically takes one to two days, so budgeting roughly £250 to £600 including a good quality stain is realistic. Fascias and soffits are usually priced as a separate job or a set daily rate, because of the access equipment involved.

Interior decorating for comparison sits in the same price structure, and our guide to room decoration costs in Northampton breaks those numbers down room by room.

What to look for in an exterior decorator

Exterior work carries risks that interior work does not: height, weather delays, and the cost of doing it twice. A decorator doing a proper job will have insurance that covers working at height, their own access equipment, and a clear written quote that states what preparation is included.

Ask what happens if it rains mid-job, and expect a sensible answer about flexible scheduling. Our guide to finding a trustworthy painter and decorator in Northampton covers the full checklist, and our painting and decoration service covers exteriors, fences, and outbuildings as standard.

Want the outside of the house sorted this season? Get a free exterior painting quote in Northampton or call us on 07743 636769, Monday to Saturday, 8am to 7pm. We cover all NN postcodes and the surrounding Northamptonshire area.