How to Prolong the Life of a Flat Roof

Flat roofs are a common feature on many homes and buildings across the UK. If properly maintained, a flat roof can last for decades. However, lack of care and maintenance can lead to leaks, water damage, and the need for expensive repairs or full roof replacement far sooner than should be necessary. By taking some simple steps, you can dramatically extend the lifespan of your flat roof. Read on for tips on inspection, cleaning, leak prevention, and more to keep your flat roof in good shape for years to come.

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Removing Excess Water

The most critical element in flat roof maintenance is ensuring water can properly drain away. Standing water leads to several problems, from stained or damaged interior ceilings to mould growth and eventually major leaks requiring roof replacement. Check your flat roof after heavy rainfalls or snowmelts for any areas where puddles are pooling. Use a lightweight puddle pump to remove excess water. Position the pump in the deepest part of the puddle or flooded section and allow it to drain the area.

Also, ensure downpipes and gutters are clear of debris that could hinder drainage. Trim back overhanging tree branches to prevent leaves from blocking drainage routes. Inspect the surface for small dips or depressions where water gathers and make repairs to level it out. Installing additional drains may also help if puddling is an ongoing issue. Proper drainage prevents water from pooling and infiltrating vulnerable areas of the roof over time.

Inspecting for Damage

In addition to checking for drainage issues, inspect the entire surface of the roof twice per year or after major storms for any signs of damage or wear. Look for cracked, loose, or missing roofing materials and have them repaired or replaced right away. Damage left untreated will inevitably lead to leaks down the road. Check areas around vents, skylights, chimneys, and other protrusions for cracks or gaps where water could seep in. Flashing should be checked to ensure it is properly sealed with no openings. Keep plants, moss, and debris cleared from the roof surface and trim back any overhanging tree branches to prevent damage from falling limbs. Catch problems early before they can expand into major leaks through routine inspections. Having a good homeowner's insurance policy can save you money in case major roof damage occurs that requires significant repairs.

Maintaining Membranes

For flat roofs constructed using membranes or specialised coatings, maintaining the surface is key to longevity. Clean the membrane twice per year using a brush and membrane-safe cleaner to remove dirt and debris. Check for small punctures, tears, or open seams around joints and patches, and re-seal these using membrane tape or liquid sealant. Applying a fresh topcoat of liquid membrane every 5-10 years will renew weatherproofing and UV protection. Poorly maintained membrane roofs are prone to cracking, peeling, and puncturing, which leads to leaks and water ingress. Proper cleaning and sealing preserves membrane integrity.

With some basic inspection, cleaning, and maintenance, the typical flat roof should last for decades before needing replacement. By quickly addressing small issues like pooled water, minor cracks, and debris buildup, you can prevent minor problems from escalating into major leaks and damage.