Exterior Cladding in Wendling - Repair or Replace?

Expert Exterior Cladding
in Wendling

Understanding Exterior Cladding and What It Does

Exterior cladding forms a protective skin over the outer walls of your home. Its job is to deflect rain, resist wind-driven moisture and reduce the amount of maintenance the underlying wall needs. Done well, it also improves how the property looks and can contribute a modest improvement to thermal performance where insulation is incorporated behind it.

The most widely used materials for homes are timber boards, composite panels and fibre cement. Each has a different lifespan, a different maintenance requirement and a different price point. Timber is the most traditional and the most variable in terms of longevity, depending entirely on how it is specified and maintained. Composite lasts well and needs little upkeep. Fibre cement is the most durable of the three and the most resistant to fire and impact.

Installed costs for exterior cladding in the UK typically range from around £50 to £120 per square metre, including labour and materials. Timber at the lower end, composite and fibre cement toward the higher end. These figures do not include structural or substrate repair work that may be needed before the cladding goes on.

The Central Question: Repair or Replace?

When cladding develops problems, the decision most homeowners face is whether to repair what is there or strip it back and start again. This is not always a straightforward call. Getting it wrong in either direction costs money - unnecessary full replacement wastes money on a system that still had life in it, while patching cladding that should be replaced delays the inevitable and often makes the underlying problem worse.

The right answer depends on the material, the age of the installation, the nature and extent of the damage, and the condition of the substrate and batten framework behind the boards. We look at each of these in turn below.

When Repair Is the Right Choice

Repair makes sense when the damage is limited to a small area and the surrounding cladding and the structure behind it are in good condition. Specific situations where repair is appropriate include:

• Isolated impact damage - a single board cracked by a falling branch or a ladder, where the boards either side are sound and can be left in place.
• Localised rot in timber cladding - if rot is confined to one or two boards at a low level (often caused by soil being banked up against the cladding or a blocked gutter dripping consistently onto the same spot), those boards can be replaced individually provided the battens behind them are dry and sound.
• Paint or coating failure on timber that has not yet allowed moisture into the board itself - if you catch peeling paint before the wood beneath has softened or split, sanding back, treating and repainting is a perfectly adequate response.
• Failed sealant at junctions - where the sealant around windows, doors or corners has cracked and shrunk but the boards themselves are structurally intact, cleaning out and re-sealing the junction is a quick fix that can add several more years to the installation.
• Loose fixings - boards that have pulled away slightly from the batten because fixings have corroded or the batten has shrunk can sometimes be re-fixed, provided the batten itself is still structurally sound and the board has not warped badly.

In all of these cases, a repair is only a sound investment if the surrounding cladding has a reasonable number of years left in it. Repairing two boards on a system that will need full replacement in three years is money not well spent.

When Replacement Is the Right Choice

Full replacement becomes the better answer when the damage or deterioration is widespread, when the substrate or battens are compromised, or when the existing system was poorly installed in the first place. Common situations where replacement is the correct call:

• Widespread rot in timber cladding - once rot has spread beyond isolated boards and into the batten framework behind, repair is impractical. Replacing individual boards leaves rotted battens in place, which will infect replacement boards within a short time. Everything has to come off.
• Damp wall behind the cladding - if moisture has been sitting between the cladding and the wall because the original installation lacked an adequate ventilation gap or a breather membrane, the wall itself may need to dry out and be treated before new cladding goes on. This is only possible with full strip-back.
• Delaminating or warped composite boards - lower quality composite products from older installations can delaminate or warp in ways that cannot be corrected. Unlike timber, composite cannot be sanded, planed or treated back into condition. If composite boards are failing, they need replacing.
• More than 30 to 40 per cent of the area is affected - this is a rough guide rather than a fixed rule, but once a significant proportion of the cladding is damaged or failing, the cost of sourcing matching replacement boards, the labour of selective replacement and the risk of the remaining boards failing shortly afterwards often makes full replacement the more economical choice overall.
• The existing system has reached the end of its expected life - treated softwood timber cladding that has been well maintained can last 20 to 30 years. Poorly maintained timber may deteriorate in 10 to 15 years. If the installation is old and the boards are showing widespread signs of age, it is usually better to replace rather than continue patching.
• A material upgrade is planned - if a homeowner wants to move from painted softwood to composite or fibre cement, full replacement is the natural point to make that change, rather than replacing like for like on a system approaching the end of its life.

The Importance of Inspecting What Is Behind the Cladding

One of the most common problems with cladding repair jobs is that nobody checks what is happening behind the boards before the replacement boards go on. A board-by-board repair can look perfectly acceptable on the surface while concealing corroded fixings, rotted battens or a damp wall behind. The only way to know is to lift a section of the existing cladding and inspect.

On any repair job we carry out, we check the batten condition and the wall surface before we commit to how much work is actually needed. If the battens are sound and dry, repair is straightforward. If they are not, we will tell you, explain what we have found, and give you an honest assessment of whether repair or replacement makes better financial sense for your specific situation.

Matching Materials on a Repair

One practical consideration with repair work is matching the existing cladding. Timber profiles change over time and a product that was widely available fifteen years ago may have been discontinued or changed in dimension. If your existing cladding is an unusual profile or was supplied by a company that no longer trades, finding a close match can be difficult.

Composite cladding is particularly prone to this problem because colours and profiles vary between manufacturers and change across product ranges. If an exact match is not available, two options exist: replace the entire elevation so that all the new material matches, or accept a visible patch repair where the new boards are a slightly different shade. Most homeowners prefer the former, especially on a front elevation.

Fibre cement can generally be painted to match, which makes colour-matching less of an issue, though profile differences between old and new boards may still be visible on close inspection.

What to Expect from a Cladding Assessment

A proper assessment before a repair or replacement job should involve a physical inspection of the wall, not just a look from the ground or a few photographs. The contractor should be able to tell you the extent of any damage, what is causing it, what condition the substrate and battens are in, and what the recommended course of action is. If the only output from a site visit is a price, without any explanation of findings, that is not a thorough assessment.

Ask specifically: what did you find behind the boards? Is the batten framework sound? Is there any sign of moisture in the wall? What is causing the damage and has that cause been addressed? These are reasonable questions and a competent contractor will answer them clearly.

Planning Considerations

Like-for-like replacement of exterior cladding in the same material and similar colour generally falls within permitted development rights and does not require planning permission. Changing the material significantly - for example, replacing timber with fibre cement in a very different colour - may require consent in some circumstances, particularly if the property is in a conservation area or is listed. It is always worth checking with the local planning authority before proceeding with any change that noticeably alters the external appearance of the building.

We Cover Wendling and the Surrounding Area

We carry out cladding repair and replacement work across Wendling and the surrounding area. Whether you need a single board replaced or a complete re-clad of an elevation, call us to arrange a visit and a detailed written quote so you can make an informed decision.