How we approach rooflight upstands & kerbs in Hayes
Our rooflight upstands & kerbs service in Hayes covers insulated kerbs built and waterproofed to suit your rooflight. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Victorian and Edwardian terraces with narrow side returns are typical of much of London, and a glass roof or long flat rooflight is the usual way to keep the back rooms bright once the return is built over. Rooflight upstands & kerbs suit new flat-roof openings and rooflight replacements.
From Hayes to Southall, Greenford and Northolt, the same survey-first process applies: measure, specify, fix the price, then fit.
Options we can specify in Hayes
- Internal plaster-box linings
- Raised upstands for deep green or ballasted roofs
- Upstand repairs and rebuilds
- Proprietary insulated kerbs
- Timber upstands with insulation
- Correct height above the finished roof
- Built square to the rooflight size
Before you order: points to check
- Upstand size must match the unit within a tight tolerance
- Insulation continuity around the upstand affects condensation
Planning, building control and Hayes
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. Replacing a rooflight or roof window can be self-certified by an installer registered with an authorised competent person scheme; otherwise building control approval is needed.
Read the planning permission guide before you commit to a design.
Rooflight upstands & kerbs prices in Hayes
Prices below are shown including and excluding VAT. In Hayes, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or raised upstand | £715 – £1,195 | £595 – £995 |
| Standard insulated upstand Typical | £475 – £715 | £395 – £595 |
| Small upstand on new roof | £355 – £475 | £295 – £395 |
The process, step by step
- Tell us what you have. Send the UB3 postcode, a rough size and a couple of photos.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Neighbouring towns
Related work in Hayes
Common questions
Does every rooflight need an upstand?
Flat and dome rooflights do. Pitched roof windows use flashing kits instead.
Can I build the upstand myself?
Your builder can, to our drawing. We check it before the rooflight is fitted, because the unit must sit square and level.
How high should a rooflight upstand be?
High enough to meet the rooflight manufacturer's minimum above the finished roof surface — commonly 150 mm. On roofs with deep finishes, such as green roofs, it needs to be taller.
Is the survey in Hayes free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
Will I need planning permission in Hayes?
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line.
