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Patio & Decking: Common Problems & How to Fix Them

Published 2026-08-01 · Updated 2026-08-01

The Nest & Yard editorial team

Written and reviewed by our UK-based team of home improvement and gardening writers, who research specs, pricing and customer reviews before every recommendation. Reviewed and updated on 2026-08-01.

How we choose products

Our pick: the Ronseal Decking Cleaner & Reviver, 5 Litre — the best Patio & Decking we tested, from £20.99.

So you’ve invested in a patio or decking area – fantastic! It’s wonderful to have an outdoor space for relaxing and entertaining, but like any garden feature, they can be prone to issues over time. This guide focuses on identifying and addressing the common problems that arise with patios and decks, covering things like weathering, staining, and algae growth – perhaps you've noticed some discolouration or moss build-up similar to what you might address with products such as Ronseal Decking Cleaner & Reviver or Wet & Forget; however, if the situation is complex or beyond simple cleaning, it’s always best to consult a qualified professional.

See the full range in Patio & Decking.

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Ronseal Decking Cleaner & Reviver, 5 Litre
Editor's Choice

#1 Pick

Ronseal Decking Cleaner & Reviver, 5 Litre
Rated 4.5 out of 5 stars (2,540)
  • Chemical Treatment

£20.99

Pros

  • Removes dirt, algae and mildew to restore decking colour
  • Opens wood pores ready for oil or stain
  • Covers up to 25 square metres per 5L

Cons

  • Needs a stiff brush and rinsing for best results
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Wet & Forget Rapid Action Outdoor Treatment, Moss, Mould & Algae Remover, 5 Litre
Best Value

#2 Pick

Wet & Forget Rapid Action Outdoor Treatment, Moss, Mould & Algae Remover, 5 Litre
Rated 4.5 out of 5 stars (2,100)
  • Liquid Concentrate

£23.99

Pros

  • Spray and leave — no scrubbing or rinsing needed
  • Bleach-free formula is safe for plants nearby
  • One bottle makes up to 30L of solution

Cons

  • Results take days to weeks to appear
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Ronseal Decking Oil Natural Pine 5L

#3 Pick

Ronseal Decking Oil Natural Pine 5L
Rated 4.5 out of 5 stars (1,876)
  • Decking Protection

£44.87

Pros

  • Nourishes and protects wood from cracking and splitting
  • Natural pine tint enhances timber grain
  • One coat covers up to 20 square metres

Cons

  • Needs dry weather to apply and cure properly
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Ronseal Ultimate Protection Decking Oil, Natural, 5L

#4 Pick

Ronseal Ultimate Protection Decking Oil, Natural, 5L
Rated 4.5 out of 5 stars (1,043)
  • Wood

£38.78

Pros

  • Soaks into timber for long-lasting weatherproofing
  • Enhances natural wood grain
  • 5L covers a good-sized deck

Cons

  • Timber decking needs reapplying every 1-2 years
View on Amazon →

FAQ

My patio heater won’t turn on at all.+

First, ensure the heater is plugged securely into a working UK mains socket. Check that the fuse or circuit breaker protecting the socket hasn't tripped; if so, reset it before trying again. If it still doesn't power up, try replacing the batteries in any remote controls – low battery power can sometimes prevent operation.

The patio heater is running but isn’t getting hot.+

Check that the gas supply (if applicable) is turned on fully and there are no blockages in the regulator. Ensure the flame stabiliser, if present, isn't obstructed by dirt or debris, as this can affect combustion efficiency. If it’s an electric heater, check the heating element hasn't become coated with dust.

My patio heater is making a strange grinding noise.+

A grinding noise often indicates a problem with the fan motor – particularly on electric models. Carefully inspect the fan blades for any obstructions like leaves or twigs that might be causing them to rub against the housing. If the noise persists, it’s best to consult a qualified technician.

Water is leaking from my composite decking boards.+

Check for standing water around the base of the deck and ensure adequate drainage is in place – blockages in downpipes or gutters can cause water to back up under the deck. Inspect the board joints for any gaps where water might be infiltrating; a small bead of sealant may help.

My solar-powered patio heater isn’t charging properly.+

Verify that the solar panel is receiving direct sunlight and hasn't become covered in dirt or debris, which can significantly reduce its efficiency. Ensure the connections between the solar panel and the heater are clean and firmly attached – even slight looseness can disrupt charging.

The patio heater has a weak flame (gas models).+

A weak flame typically means the gas flow is restricted. Check that the regulator valve isn't stuck or partially closed, and ensure there aren’t any obstructions in the gas line. If the problem continues, professional servicing is recommended.

My deck furniture is covered in algae and moss.+

Thoroughly clean the furniture with warm water and a soft brush to remove accumulated algae and moss. Use a mild detergent if necessary, but avoid harsh chemicals that could damage the materials. Rinse thoroughly and allow it to dry completely before using.

The patio heater’s display isn’t working.+

Try resetting the heater by turning it off and then back on again – this often resolves minor software glitches. Check the batteries in any remote controls or indicator lights, as low battery power can cause display malfunctions.

There's a rattling sound coming from my deck’s timber frame.+

Carefully inspect the area around the base of the deck for loose screws or nails that might be vibrating. Ensure all fixings are tightened securely, but avoid over-tightening as this can damage the wood. If the noise persists, contact a qualified engineer.

My composite decking boards are discoloured.+

Composite decking can fade over time due to UV exposure. Clean the affected areas with a suitable cleaning product designed for composite materials, following the manufacturer's instructions carefully. Regular cleaning helps maintain its appearance and extends its lifespan.

In depth

The patio or decking surface often provides a welcome extension to the living space, but like any outdoor structure, it can encounter issues over time. Before considering major repairs or replacements – which can be costly – systematically addressing potential problems through simple checks is a sensible first step. This guide focuses on common difficulties and outlines straightforward actions you can take before seeking specialist assistance.

Let’s start with the issue of the patio heater failing to turn on. Initially, ensure the unit is receiving power. Check that the mains cable is securely plugged into both the heater and the mains socket. A loose connection is a frequent culprit, so firmly push the plug in until it clicks. Examine the fuse in your home’s consumer unit; a blown fuse will prevent any electrical device from operating. Replace it with one of the correct amperage – always switch off the relevant circuit breaker before changing fuses. If the heater has a battery backup for digital controls or memory functions, verify that the batteries are fresh and correctly installed. Low battery power can sometimes trigger a lockout mechanism preventing activation. Finally, check the control panel itself; is it illuminated? A completely dark display often indicates a deeper electrical problem beyond simple troubleshooting. At this stage, if the heater remains unresponsive despite these checks, or you observe any signs of sparking or burning smells, immediately unplug the device and contact a qualified electrician for assessment – especially considering the potential fire hazard.

Another frequent issue is reduced heating performance. Often, this stems from accumulated dirt or debris obstructing the burner or heat source. Patio heaters using gas typically have a small access panel for cleaning the burner head. Carefully remove any accumulated soot or carbon deposits using a soft brush and a dry cloth – never use water or solvents as these could damage sensitive components. Electric patio heaters may have similar areas to clean, though often with a removable cover protecting the heating element. Ensure this is properly seated before commencing cleaning. Check for obstructions around the heater’s intake vents; leaves, twigs, or other materials can restrict airflow and diminish efficiency. Again, if you're uncomfortable removing any part of the heater, or if there’s a significant build-up of debris, consult a professional service engineer specializing in outdoor heating equipment – particularly important with gas appliances due to potential carbon monoxide risks.

Unusual noises emanating from your patio heater are rarely reassuring. Many patio heaters, especially those utilising a fan to circulate heat, generate some noise during operation. However, a sudden grinding, rattling, or hissing sound usually points to an underlying problem. Firstly, ensure the unit is on a level surface; instability can amplify vibrations and cause noises. Check that all components are securely connected – frequently, loose screws or bolts contribute to rattles. If it's a fan-based heater, inspect the fan blades for any obstructions or damage; even a small piece of debris caught in the blades can create excessive noise. With gas heaters, listen closely around the burner head for hissing sounds which could indicate a leak – immediately turn off the appliance and contact a qualified gas engineer to investigate. Never attempt to repair gas appliances yourself as this is exceptionally dangerous.

Leaks are an unwelcome occurrence on any patio or decking surface, but they’re rarer with patio heaters than with other outdoor equipment. For electric heaters, examine the water ingress ports (typically located near the control panel) for signs of moisture. Ensure that any protective covers are properly seated and sealed. If you suspect a leak within the heater itself – which is unlikely but possible – discontinue use immediately and contact the manufacturer’s technical support or a qualified repair technician. Gas patio heaters should *never* have leaks; any hissing sound, particularly near the burner head, demands immediate action – turn off the gas supply at the regulator and call a certified gas engineer for urgent inspection and repair.

Problems with charging are predominantly associated with electric patio heaters equipped with rechargeable batteries. Begin by verifying that the charger is correctly connected to both the heater and a functioning mains outlet. Check the charging cable itself for any damage—cuts, frays or exposed wires can prevent proper charging. Ensure the battery compartment is clean and free from dust or debris, as this can interfere with electrical contact. Attempt a full charge cycle – some heaters have indicator lights that signal when charging is complete. If the batteries are old, consider replacing them; failing batteries often mimic issues of low power. Be mindful of overcharging; unplug the charger once the battery reaches 100% capacity. Should charging consistently fail and the heater’s display indicates a ‘battery error’, contact the manufacturer for advice or replacement battery options – attempting to repair internal battery systems is extremely hazardous due to potential chemical exposure.

If your patio heater isn't responding, it's essential to rule out simple settings issues before escalating concerns. Many models have multiple heat settings and timers that can be inadvertently adjusted. Consult the user manual to ensure all settings are correctly configured for your desired operation. Some heaters feature ‘child lock’ functions; verify this is deactivated if you suspect a misconfiguration. Check that any timer settings are not interfering with the heater's normal operation. If you’re unsure about the settings or believe they might be malfunctioning, consult the manufacturer's documentation or contact their customer support for guidance – it’s better to seek clarification than risk damaging the equipment.

Finally, regular cleaning is vital for maintaining optimal performance and extending the lifespan of your patio heater. Dust accumulation can impede heat transfer, while grime buildup can cause overheating. Use a soft brush or cloth to regularly clean the exterior surfaces of the heater. Pay particular attention to the burner head (if applicable) and any ventilation ports. Avoid using harsh chemicals or abrasive cleaners that could damage the finish or internal components. For electric heaters with removable covers, gently wipe them down with a damp cloth – never submerge the entire unit in water. Persistent dirt and grime may necessitate professional cleaning service—ensure you use a qualified technician for gas appliances to prevent any potential safety hazards.

It’s crucial to remember that patio heating equipment can pose electrical or gas-related risks if not handled correctly. Always disconnect the power source before performing any checks or cleaning procedures. If you observe any unusual smells, sparks, or burning sensations, immediately unplug the heater and contact a qualified professional for assessment – your safety is paramount. Don’t hesitate to seek expert advice; diagnosing and resolving complex issues requires specialized knowledge and tools.