Maintenance and lifespan
What to check every year, how often to repaint, and how to keep a dormer in shape for 30 years instead of 15.
Short answer
How much maintenance does a dormer need?
Less than people think — if it was built well. A yearly visual check, a five-minute clean of the gutter and a paintwork refresh every few years for timber elements is enough. The rest is reacting quickly when something does come up.
Schedule
Maintenance by material
| Material | Yearly check | Paintwork | Replace cycle |
|---|---|---|---|
| PVC | Visual + clean | Never | 20–30 yrs |
| Timber | Visual + paint check | Every 5–8 yrs | 30+ yrs with care |
| Composite | Visual + joint check | Never | 25–40 yrs |
| HPL | Visual only | Never | 40+ yrs |
| Polyester shell | Visual + sealant | Touch-up only | 25+ yrs |
| Lead flashing | Sealant + edges | Never | 50+ yrs |
Risks
What to catch early
Checklist
Yearly 10-minute check
Checklist
Once a year, ideally in autumn
- 01Walk around the house and look up: any visible damage?
- 02Check gutter for leaves and debris near the dormer.
- 03Look at lead flashing for lifting or splits.
- 04Check sealant around frames for cracks.
- 05Look at the cladding for discolouration, algae, dents.
- 06From inside, check ceiling and corners for damp spots.
- 07Note anything odd, with photos, dated.
Read next
Related guides
Quick answers
Frequently asked questions
FAQ
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01How long does a dormer last?
A well-built dormer lasts 30+ years. Cladding may need refreshing earlier; the structure itself should last decades.
02How often should I inspect a dormer?
Once a year. Lead flashing, sealants and gutters around the dormer are the weak points; catching small issues early is much cheaper than fixing damage later.
03Do I have to repaint a timber dormer?
Yes — typically every 5–8 years depending on exposure. Skipping paintwork leads to wood rot and ends the warranty.
04What if my dormer starts leaking?
Document with photos, note when and where. Contact the company first if it is within warranty. Most leaks start at lead flashing, sealants or gutter junctions.
Conclusie
A dormer is a long-term part of your house, not a one-off purchase. Ten minutes a year and a paint job every few years is the difference between 15 and 30 years of life.