Balconies and roof terraces in Berkhamsted

What does a balcony or terrace in Berkhamsted need?

Owners of flats in Berkhamsted sometimes find that a neighbour's balcony is leaking into their home. Where a balcony serves one flat but sits over another, the repair needs proper waterproofing and drainage, and a clear written specification helps everyone involved agree the work.

In and around Berkhamsted, flat roofs are typically found on terraced streets with flat-roofed rear kitchens and bathrooms, and on lock-up garage blocks on estates. The East of England is the driest part of Britain, with parts of the Anglian region around 630 mm a year, so summer heat and UV, not rainfall, do most of the ageing on a felt roof.

How much does balcony or terrace waterproofing cost in Berkhamsted?

For Berkhamsted we use East of England rates: £2,000–£3,400 is the guide for a 12 m² balcony in a liquid-applied system including scaffold, VAT included. The fixed price comes after a free survey for new and replacement roofs.

How are thresholds, drainage and paving handled on a terrace?

They are designed together, because most balcony leaks start at the door threshold, a blocked outlet or a fixing driven through the membrane. Getting those three right matters more than the brand of membrane.

Thresholds: upstands are usually 150 mm above the finished surface, but a level or low step-out door cannot always achieve that. Where the upstand has to be reduced, extra protection is needed, such as a drainage channel at the door and a fall away from it, and the membrane must still run up and under the door sill.

Drainage: every terrace needs a reliable way off for water, with outlets sized for the area and an overflow if one outlet could block. Outlets under paving need access for cleaning.

Inverted roofs and pedestals: on an inverted roof the insulation sits above the waterproofing and is held down by paving or ballast, protecting the membrane from sun and foot traffic. Adjustable pedestals lift paving slabs level above the falls, so water drains underneath and the surface stays flat. Balustrade posts are fixed through upstands or side-fixed where possible, with every penetration sealed into the membrane.

What's included?

• Lifting and setting aside of existing paving or decking
• Written workmanship guarantee, with approvals handled where needed
• Sealed details at doors, outlets, walls and balustrade posts
• Strip-out of the failed membrane and deck repairs

Building regulations in England

Replacing more than half of a flat roof over a heated room usually counts as renovating a thermal element, so the roof is insulated to around 0.16 W/m²K where that's technically and economically feasible, and the work is notified to building control: the council or a registered building control approver, unless a registered competent person self-certifies it. A roof on a new extension is built to 0.15 W/m²K. Patch repairs, and most unheated detached garages, don't trigger the upgrade. Structural changes, or a new covering that adds 15% or more to the roof's weight, also need approval. More on the rules.

Which nearby areas do we also cover?

• Chesham · 4 mi
• Hemel Hempstead · 5 mi
• Amersham · 7 mi
• Dunstable · 9 mi
• Rickmansworth · 9 mi
• Harpenden · 10 mi

Other flat roof work in Berkhamsted

• Green and sedum roofs
• Torch-on felt roofing
• Single-ply membrane roofing
• Warm roof insulation upgrades
• GRP fibreglass roofing
• Emergency leak repairs
• All services in Berkhamsted