Too many vulnerable details
Rooflights, pipes, outlets, corners and upstands multiply the number of interfaces a sheet system must form around.
Prokol MonoSeal · domestic liquid roofing
MonoSeal liquid roofing.For complex domestic flat roofs.
Pure-polyurea waterproofing for suitable complex domestic flat roofs, balconies and overlay applications.
Warranty terms in writingBROOF(t4)1530% elongation
Tell us about your roof
Send photographs, dimensions, postcode and the current problem.
Request assessment 01254 4339871530%
Published elongation
Manufacturer data
Pure polyurea
3GTX technology
Hand-applied membrane
Seamless
Detail-led system
No sheet membrane seams
BROOF(t4)
External fire performance
Tested classification
Why homeowners choose it
EPDM can suit straightforward roof areas. MonoSeal can be more suitable where complex details, irregular geometry or retained surfaces make sheet application less practical.
The problems it solves well
Complex details need careful waterproofing.
MonoSeal creates a continuous membrane across the roof field and its details, but only after the underlying problem has been properly identified.
An awkward existing roof
Changes in level, irregular geometry and retained waterproofing can make a strip-and-sheet solution disproportionately disruptive.
Recurring leaks at junctions
The main roof covering may be serviceable while transitions, edges or penetrations repeatedly admit water.
Appearance and intended use matter
Visible roofs, balconies and terraces need a specification that considers waterproofing, appearance and intended use together.
Domestic applications
A continuous membrane around complex roof details.
Complex extension roofs
A seamless route around rooflights, lanterns, parapets, outlets and multiple changes in geometry.
Balconies + terraces
Waterproofing designed around thresholds, edges, outlets and the specified traffic or finish requirement.
Dormers + bay roofs
Compact, detail-heavy areas where sheet cutting and multiple junctions can become the weak point.
Garage + garden rooms
A liquid-applied option where the roof shape, visible finish or retained substrate makes sheet application less practical.
Existing roof overlays
Potentially avoids unnecessary strip-back where the existing build-up is dry, stable, compatible and properly prepared.
Roof detail refurbishment
MonoSeal Detail can treat intricate areas without reinforcement fleece, subject to the confirmed specification.
EPDM or MonoSeal?
Choose the system from the roof condition.
Roof conditionLikely routeWhy
Simple new timber deckUsually EPDMA single sheet is efficient and economical where geometry is clean.
Multiple rooflights or penetrationsUsually MonoSealSeamless application reduces separate formed junctions.
Irregular or changing geometryUsually MonoSealLiquid application follows the real shape of the roof.
Suitable existing waterproofingAssess MonoSeal overlayCondition, moisture, adhesion and compatibility must pass first.
Wet, rotten or unstable deckNeither yetStrip back, investigate and repair the build-up before waterproofing.
Straightforward garage or extensionUsually EPDMA single-sheet system may offer better value where the roof is suitable.
Balcony or terraceAssess MonoSealWaterproofing, thresholds, drainage and final use must be specified together.
Warranty availability is subject to the approved system specification, substrate preparation, trained installation, inspection records and applicable warranty terms.
The specification route
The finish is only as good as what sits beneath it.
01Diagnose
Establish whether the issue is the covering, detail, deck, drainage or trapped moisture.
02Test
Confirm substrate stability, dryness, adhesion, contamination and compatibility.
03Specify
Set preparation, primers, membrane build-up, detail treatment and finish.
04Deliver
Use trained approved contractors with project records and inspection points.
05Protect
Complete qualifying warranty documentation and define future inspection requirements.
MonoSeal on domestic roofs
The details become part of one continuous finish.
A liquid-applied membrane can be useful around rooflights, parapets, outlets, thresholds and changes in level. These photographs show the application and completed finish.
When MonoSeal is not the answer.
Wet, rotten or unstable decks
Unresolved structural movement
Contaminated or incompatible substrates
Poor drainage left uncorrected
A simple roof where EPDM gives better value
Any project without the required preparation
Clear answers
MonoSeal domestic roofing answers
Direct answers about warranties, overlays, details, balconies and choosing between MonoSeal and EPDM.
MonoSeal roof assessment