Hemel Hempstead at a glance
- Postcode districts
- HP1, HP2, HP3
- Population
- about 95,961 (GeoNames)
- Council area
- Dacorum Borough Council
- Building approval
- Dacorum Borough Council building control, or a registered building control approver
- Nearest main town
- Watford, about 7 miles
- Guide price region
- East of England (+5% on West Midlands rates)
What does a balcony or terrace in Hemel Hempstead need?
A roof terrace in Hemel Hempstead may be re-waterproofed when the owners want to change the finish, swapping old tiles for decking or porcelain on pedestals. Lifting the surface exposes the membrane, and replacing it then avoids having to lift the new finish again later.
Hemel Hempstead's flat roofs are mostly on low-rise post-war blocks of flats, with plenty on 1960s and 1970s link-detached houses with flat-roofed garages and porches too. 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 Hemel Hempstead?
At East of England guide rates, a 12 m² balcony in a liquid-applied system including scaffold comes to £2,000–£3,400 including VAT. The fixed price comes after a free survey for new and replacement roofs.
| Job | Guide price inc VAT |
|---|---|
| Balcony (12 m²), liquid-applied, scaffold | £2,000–£3,400 |
| Single garage (18 m²), EPDM rubber | £1,700–£2,950 |
| Extension (20 m²), GRP, new deck + insulation | £3,150–£5,650 |
How long does it take to waterproof a balcony?
A small balcony is typically waterproofed in two to four working days, plus time for scaffold if it is above ground floor. Liquid and GRP systems need dry weather and cure time between coats, which sets the pace.
The balcony door will be out of use while the membrane is laid and curing, and the room behind may be noisy while old paving or screed is broken out. If the team needs to work through the house, we agree a route and protect floors. Larger terraces with paving or decking take longer, because the finish has to be lifted and reinstated. Resin systems smell while they cure, so nearby windows are best kept closed.
What's included?
- New liquid, GRP, single-ply or asphalt waterproofing
- Lifting and setting aside of existing paving or decking
- Free survey of the deck, falls, outlets and door thresholds
- 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?
Balconies and roof terraces in Hemel Hempstead: questions
Do you cover Hemel Hempstead?
Yes. Hemel Hempstead is part of our Hertfordshire coverage, including postcode districts HP1, HP2, HP3. Surveys and roofs are carried out by vetted roofing teams working under S&K Property Investments and Improvement Ltd.
Who checks building regulations for a flat roof in Hemel Hempstead?
Where the work needs approval it goes to Dacorum Borough Council building control, or a registered building control approver. We tell you at the survey whether your job needs it and deal with the paperwork as part of the quote.
How much does balcony or terrace waterproofing cost in Hemel Hempstead?
£2,000–£3,400 for a 12 m² balcony in a liquid-applied system including scaffold, at East of England guide rates including VAT. The fixed price comes after a free survey for new and replacement roofs.
How long does balcony waterproofing last?
It depends on the system and how well it is protected. As indicative ranges, liquid-applied systems last 10–25+ years by product and mastic asphalt 30–60, with good maintenance.
Can I put decking straight onto my flat roof?
Not directly onto the membrane. Decking needs a supporting system that spreads the load and lets water drain, and the roof must be checked for the extra weight.