Cat Slide Dormers in Gloucestershire
Gloucestershire homeowners come to us for cat slide dormers that are properly detailed at the junctions — because that is where dormers succeed or fail.
Cat Slide Dormers — indicative geometry
Cat Slide Dormers for Gloucestershire homes
Because Gloucestershire is largely Victorian and Edwardian terraces, interwar semi-detached houses and post-war bungalows, the roof pitches and span widths we meet are fairly predictable, and that makes feasibility a quick conversation rather than a guess.
A cat slide (or 'sweeping') dormer lets the main roof plane run on below the dormer sill, so the dormer appears to emerge from the roof rather than to be planted on it. It is a rural and cottage idiom, and it works beautifully on long, low roofs where a box dormer would look brutal. Detailing at the sill and the sweeping valley is the whole job.
Key specification
| Typical width | 1.2m – 3.0m |
|---|---|
| Sweep | Main roof continues below sill line |
| Roof finish | Plain tile, slate or pantile |
| Critical detail | Swept valley and sill flashing |
Planning and building control in Gloucestershire
Getting the consent route right at the start saves months. We establish whether it is permitted development, a lawful development certificate or a full application on the first visit.
Building regulations approval is separate and always required. We submit the application, book the inspections around the programme and hand you the completion certificate at the end — the document a buyer's surveyor will ask to see.
Why homeowners in Gloucestershire use us
The completion certificate is part of the deliverable, not an afterthought. It is the document that makes the space count when you come to sell.
The quickest route is a photograph of the rear elevation over WhatsApp — we can usually tell you what is feasible before anyone visits.
Other dormer work in Gloucestershire
- Dormer Window Replacement in Gloucestershire
- Aluminium Dormer Windows in Gloucestershire
- Dormer Cladding in Gloucestershire
- Dormer Window Repairs in Gloucestershire
- Gable-Fronted Dormers in Gloucestershire
- Full-Width Rear Dormers in Gloucestershire
- Eyebrow Dormers in Gloucestershire
- Velux to Dormer Conversions in Gloucestershire
FAQs
Cat Slide Dormers in Gloucestershire — FAQs
Why is my dormer leaking?
In our experience the window itself is the cause less than a fifth of the time. Far more often it is the apron flashing at the dormer front, the lead soakers where the cheeks meet the roof slope, the back gutter behind a pitched dormer, or a split at an upstand in the flat covering. Water then tracks along a rafter and appears somewhere else entirely, which is why we trace the path before quoting.
Will a dormer add value to my house?
A properly built and signed-off dormer conversion adding a bedroom and bathroom typically returns a meaningful share of its cost in value, and more in areas where floor space is scarce. The building control completion certificate is what makes the space count as habitable floor area on a valuation — without it, surveyors will not include it.
Is scaffolding included in the price?
Yes. Every quotation we issue includes scaffold design, erection, weekly inspection, hire for the programme and dismantling. Scaffold appearing as an extra afterwards is one of the more common complaints about dormer work, so we price it in from the start.
How wide can a dormer be?
Structurally, as wide as the roof — full-width rear dormers regularly run six to eight metres, carried on a steel ridge beam. The limits are usually planning volume allowances and the setbacks needed at eaves and ridge, rather than what can be built.
What guarantees do you provide?
Structural work carries a ten-year guarantee, GRP and EPDM flat roofing twenty years, windows ten years on frames and sealed units, and lead and zinc work is covered for workmanship for ten years. You also receive the building control completion certificate, which is the document that actually matters when you sell.
Find out what your roof will take
A free measured survey in Gloucestershire tells you what is achievable, what it needs, and what it costs — before you commit to anything.