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Telford, ShropshireLiquid Applied
03Waterproofing system
Liquid Applied Waterproofing
Liquid applied waterproofing is a cold, seamless membrane rolled or spray applied over the roof and reinforced with a fleece. Because it has no laps and dresses around any shape, it suits roofs congested with plant, rooflights and upstands, and it can overlay a sound existing roof.
- Application
- Cold applied, no hot works
- Resin types
- PMMA and polyurethane
- Typical guarantee
- 15 to 25 years
- Cure time
- PMMA trafficable in around one hour
About Liquid Applied Waterproofing
The single biggest advantage of liquid is that it is monolithic. There are no seams to fail, and it forms a continuous membrane around the details that cause most flat roof failures. On a roof crowded with plant plinths, rooflights and pipe penetrations it is often the only sensible answer.
It is applied cold. No flame, no hot bitumen, no odour of any consequence and no hot work permits. On a school, hospital or trading retail unit that removes the largest single risk from the works and usually removes the need to decant occupants.
Liquid also lends itself to overlay. Where the existing membrane is sound and the insulation is dry, we can clean, test, locally repair and overlay rather than strip. That reduces cost, cuts programme and diverts a substantial tonnage of material from landfill.
Best suited to
- Roofs congested with plant and penetrations
- Overlay refurbishment of a sound existing roof
- Occupied schools, hospitals and retail units
- Balconies, walkways and gutter linings
Sectors we install it in
Typical build-up
Section / outside in- 01
Top coat
UV stable finish, colour to specification
- 02
Reinforcement fleece
Fully saturated between coats
- 03
Base coat
Cold applied resin, bonded to the substrate
- 04
Primer
Selected after adhesion testing on the actual substrate
- 05
Existing or new substrate
Overlay onto sound existing, or onto new insulation
Specifying this system?
We issue technical submittals, U-value calculations, wind uplift calculations and detail drawings as part of the tender return.
Send us the specificationDelivered
All case studiesProjects using this system
Common questions
Liquid Applied, answered
Can you overlay our existing roof rather than replace it?
Often yes. We core the roof and moisture test the insulation first. If the existing build-up is dry and the deck is sound, an overlay gives you a fully guaranteed roof at a fraction of the cost and programme of a strip and replace.
Can it be applied during winter?
PMMA resins cure at low temperatures and can be applied through most of the year, subject to substrate temperature and dew point. We monitor conditions daily and will stop rather than apply outside the manufacturer window.
Other systems and services
Tender & project enquiries
Have a project for us?
Send Absolute Waterproofing your roofing enquiry or tender. Drawings, specifications and a link to the tender information can all go with it, and our estimating team will come back to you with a considered price rather than a holding email.
