Flat-roof waterproofing
in Chaumont-Gistoux
Multi-layer bituminous waterproofing on a flat roof: garage, outbuilding, extension, non-accessible terrace. In Chaumont-Gistoux (1325) it is a regular request: on the plateau nothing stops the wind, so big roofs lose tiles and verges every slightly windy winter.
The context in Chaumont-Gistoux
Why here in particular
On the farmland plateau of Walloon Brabant, Chaumont-Gistoux brings together several villages, square-plan farmsteads and widely spread recent housing. In practice, nothing stops the wind up on the plateau: large roofs lose tiles and verges there every slightly windy winter.
A flat roof almost never leaks in the middle. It leaks at the upstands, at the corners and around the roof outlet — where the old membrane was badly turned up or has ended up shrinking back.
- Quote
- Priced after a site visit, free of charge and with no obligation.
- Duration
- 1 to 3 days for a standard surface.
- Call-out
- Included in Chaumont-Gistoux and neighbouring municipalities
How it runs
How the job runs
The same protocol everywhere, adapted to what the visit reveals on site. Nothing is decided from the pavement.
- Survey of what is there
- Removal and disposal if needed
- Vapour barrier and insulation to suit the configuration
- Two-layer torched waterproofing
- Upstands, flashings and edge trims
- Roof outlet and overflow checked
Probing
We check what is under the membrane. Waterlogged insulation gets replaced, not covered over.
Removal or overlay
Depending on the condition, full removal or fitting over the existing layer if the substrate allows.
Vapour barrier and insulation
If the roof is insulated, PIR or wool depending on the configuration.
Undercoat
First layer, self-adhesive or torched, with staggered joints.
Finish
Top membrane torched on, mineral-finished or smooth depending on exposure.
Measurements and waste removal
Upstands round the perimeter, outlet spigot, water test verified.
Frequently asked questions
Flat-roof waterproofing in Chaumont-Gistoux
The questions we get asked most often before this kind of job.
Do you attend leaks as an emergency?
Yes, a temporary repair first to stop the water, then costing the permanent repair calmly.
How long does flat-roof waterproofing last?
A two-layer system laid properly lasts 20 to 25 years. A single layer laid in a hurry lasts a lot less.
Can you lay over the old flat-roof waterproofing?
If the surface is dry and sound, yes. If the insulation is waterlogged, no: the problem would come back from underneath.
Do you come out to Chaumont-Gistoux with no extra call-out charge?
Yes. Chaumont-Gistoux is one of our 17 municipalities: the call-out is included in the quote, not added at the bottom of the invoice.
Other work in Chaumont-Gistoux
While we are on site
Combining two jobs in one visit brings the invoice down. We suggest it when it makes sense, never to pad the quote.
Flat-roof waterproofing in the neighbouring municipalities
All our work in Chaumont-Gistoux · Everything about flat-roof waterproofing
A quote for flat-roof waterproofing in Chaumont-Gistoux?
On-site visit, detailed costing within 48 working hours, with no obligation on your part.