Roofing FAQs & Expert Advice in Orpington, Bromley & Kent

In most cases, replacing a roof falls under Permitted Development, meaning you do not need formal planning permission. However, this is only true if the replacement materials are similar in appearance to the existing roof and the height of the roof does not exceed the original peak.

Critical Exceptions:

• Conservation Areas: If you live in designated conservation areas in Chislehurst, Greenwich, or parts of Sevenoaks, you must match the historic materials precisely (such as natural Welsh slate or handmade clay peg tiles) and may need local planning approval.
• Structural Changes: Altering the shape of the roof, raising the ridge height, or installing large rooflights that protrude significantly will require planning permission.

Our team handles local authority liaison and ensures your project complies fully with local guidelines. For more details, visit our Local Planning Guidance page.

Under Part L of the UK Building Regulations, if you repair or replace more than 50% of a roof's total surface area, you are legally required to upgrade the thermal insulation of the entire roof space to meet current energy efficiency standards.

This regulation aims to reduce carbon emissions and lower energy bills. When Kevington Roofing and Building LTD undertakes a full roof replacement, we assess your existing loft insulation. If it does not meet the current required U-value, we will install high-performance insulation solutions (such as modern mineral wool or PIR rigid board insulation) to make your home fully compliant and highly energy-efficient.

Severe autumn storms or harsh winter weather can cause sudden water ingress, slipped slates, or structural damage. If you experience an emergency, follow these steps immediately:

1. Prioritise Safety: Never attempt to climb onto a wet, windy, or damaged roof yourself.
2. Contain Internal Damage: Place buckets under active leaks, move valuables away from the affected area, and cover furniture with plastic sheeting.
3. Document the Damage: If safe to do so from ground level, take photos of the interior leak and any visible external damage for insurance purposes.
4. Call a Professional Emergency Team: Contact our rapid-response team immediately at 01689 663319 for safe, temporary weatherproofing (such as heavy-duty tarpaulin installation) to secure your home.

We provide fast-response support across South East London and Kent. Read more on our Emergency Roof Repairs page.

There is no single "flat rate" for a roof replacement, as costs depend heavily on structural variables. Key factors include:

• Property Size & Shape: A simple terraced house requires fewer materials and less labour than a complex, multi-gabled detached home.
• Material Choice: Concrete tiles are highly cost-effective and durable. Natural slate offers unmatched aesthetics and longevity but requires a higher upfront budget. For flat roofs, modern GRP (fibreglass) or EPDM (rubber) options vary in cost compared to traditional high-performance felt.
• Access & Scaffolding: Difficult-to-reach locations or homes requiring specialized scaffolding to protect public pathways can affect the overall cost.

We provide completely transparent, itemised quotes detailing every aspect. Contact us today to request an accurate roof replacement quote.

Early detection of roofing issues can save you thousands of pounds in extensive structural repairs. Keep an eye out for these critical warning signals:

• Water Stains: Damp patches on ceilings, peeling wallpaper, or watermarks in your loft space.
• Slipped or Broken Tiles/Slates: Visible gaps on your roof pitch or broken pieces of slate lying in your garden.
• Moss and Debris: Heavy moss growth that traps moisture, potentially cracking concrete tiles during winter freeze-thaw cycles.
• Sagging Roof Line: A dipping ridge line suggesting structural failure or rotting support timbers.
• Flashing Failures: Damaged or cracked mortar or lead around chimneys and valleys, which is the most common source of leaks.

If you notice any of these signs, book a professional drone roof inspection for an accurate, non-invasive health check.