Weatherproof Pipe & Flue Penetrations
One pipe through a metal roof changes how rainwater has to travel across the sheet. Bremick Dektite roof flashings provide Australian roofers, plumbers, builders & maintenance crews with flexible EPDM boot flashings designed to waterproof pipe & flue penetrations through profiled metal roofing. A formable base follows the surrounding roof profile while the boot seals around the penetration, creating a purpose-made flashing detail rather than relying on sealant alone.
Planning the complete weatherproofing job? Explore Roofing Materials & Sealants for related roofing products or Roof Sealants & Adhesives when the installation requires compatible sealing products. Selecting the Dektite itself comes down to pipe outside diameter, Premium or Combo configuration, roof geometry, access & the conditions surrounding the penetration.
What Are Bremick Dektites?
Dektite turns the awkward junction between a round service pipe & profiled roof sheet into a flashable connection. Bremick describes Dektites as EPDM boot flashings incorporating a flexible aluminium band for waterproofing flue & pipe penetrations through profiled metal roofs.
The tapered boot accommodates different penetration diameters within the nominated range of each flashing, while the base can be formed to follow corrugations & other suitable roofing profiles.
The broader application includes:
► Pipe penetrations
► Plumbing vents
► Flue penetrations
► Service pipes
► Ventilation penetrations
► Conduits
► New roofing work
► Existing roof alterations
► Suitable retrofit applications
Bremick documents Dektite EPDM solutions for penetrations up to approximately 500 mm diameter, depending on the selected product.
You'll also encounter several useful search & trade terms for this product family, including Dektite flashing, roof pipe flashing, EPDM roof flashing, pipe boot flashing, roof penetration flashing, flue flashing & metal roof flashing.
They describe related functions, but the exact Dektite configuration still needs to suit the job.
Why Choose Bremick Dektites?
Keeping water outside requires more than closing the visible gap around a pipe. Rain travelling down a profiled roof needs to pass around the entire penetration while the flashing maintains contact with both the service & surrounding roofing.
Dektite roof flashings address that transition with:
► Flexible EPDM boot construction
► Formable aluminium-supported base
► Accommodation of different pipe diameters
► Suitability for profiled metal roofing
► Premium new-build options
► Combo new-build & retrofit options
► A purpose-designed roof penetration detail
That combination makes Dektite useful across Australian sheds, workshops, commercial roofing, building services & maintenance work where pipes or flues interrupt the roof surface.
Correct selection remains essential. A flashing can be the right brand & still be the wrong size or configuration for the penetration.
Common Applications
Look across the roof of a working shed & almost every protrusion has a different reason for being there. Plumbing, ventilation, heating & building services can all create penetrations that need to remain weatherproof without preventing the service from performing its intended function.
Bremick Dektite roof flashings may be relevant for:
► Plumbing vent pipes
► Flue penetrations
► Ventilation pipes
► Building-service penetrations
► Exhaust pipework
► Electrical conduits
► Workshop extraction systems
► Industrial service pipes
► Metal-roof alterations
► Replacement flashing work
An Australian plumbing vent exposed only to ambient conditions isn't necessarily the same selection problem as a flue carrying elevated temperatures.
Likewise, flashing a penetration during new roof construction gives the installer different access from repairing an established pipe that cannot simply be disconnected.
Spring Jobsite Prep Getting Your Gear Ready provides broader practical thinking around having materials, consumables & equipment organised before site work becomes busy.
Product Selection Guide
Don't begin with the colour of the flashing—begin with the pipe coming through the roof. Outside diameter, access, flashing configuration, roof profile & service conditions narrow the choice much more effectively.
A practical selection sequence is:
► Measure the pipe outside diameter
► Identify the Dektite size range
► Decide between Premium & Combo where applicable
► Check whether the pipe can accept a pull-over flashing
► Review roof profile & installation geometry
► Confirm service conditions
► Check the exact product instructions
► Plan sealant & mechanical fastening requirements
Measure The Outside Diameter
The hole in the sheet can be misleading; the pipe is the dimension the boot actually has to seal around. Measure the outside diameter of the penetration & compare it with the nominated range for the exact Dektite product.
Bremick's EPDM Dektite documentation covers pipe & flue penetrations up to approximately 500 mm diameter across the range.
For accurate selection:
► Measure the actual outside diameter
► Don't estimate from nominal pipe description alone
► Identify the corresponding Dektite size range
► Read the moulded cutting guide
► Check the exact product data before trimming
A 100 mm nominal service description, for example, shouldn't replace an actual outside-diameter check where the flashing fit depends on the physical pipe.
Dektite Premium Or Dektite Combo?
Whether the pipe can pass through the flashing is one of the fastest ways to separate these two options. Bremick identifies Premium & Combo as different installation configurations within its Dektite EPDM range.
Dektite Premium
Bremick specifies Premium flashings for new-build applications.
They suit situations where the flashing can be installed as intended during construction & access to the penetration allows the boot to be fitted over the pipe.
Dektite Combo
Bremick specifies Combo flashings for both new-build & retrofit applications.
That distinction becomes valuable when existing pipework, flues or connected services make a conventional pull-over installation impractical.
Before ordering, look at the physical job:
► Is the pipe already connected?
► Can anything above the roofline be removed?
► Can a flashing slide over the top?
► Is this new construction?
► Is the existing service staying in place?
► Does the selected Dektite configuration support the required installation method?
A few minutes checking access can prevent arriving on the roof with the correct diameter but the wrong flashing format.
Read The Roof Before Dressing The Base
Corrugations tell water where to travel, so the flashing has to work with them rather than fight them. The flexible aluminium band within the Dektite base allows it to be formed to profiled metal roofing.
Before fastening anything, study:
► Roof fall
► Ribs & valleys
► Direction of water flow
► Position of the penetration
► Space surrounding the base
► Nearby sheet laps
► Existing flashings
The objective is to create good contact while preserving an effective drainage path around the penetration.
Weatherproofing Supplies provides another relevant pathway for projects where the Dektite forms one part of a wider external weatherproofing job.
Cutting The Boot Deserves A Second Measurement
A cautious first cut costs seconds; an oversized opening can cost the flashing. Dektite boots use a stepped or tapered design that allows the installer to trim the opening to suit the relevant pipe diameter.
Use the product markings & installation instructions rather than guessing where to cut.
A sensible workflow is:
► Measure the pipe
► Confirm the measurement
► Locate the corresponding cutting point
► Make a clean controlled cut
► Check the fit
► Continue with the specified installation procedure
Avoid cutting several steps away “just to make it easier to slide on”. The fit around the penetration is part of the weatherproofing arrangement.
Profile The Base Instead Of Flattening The Roof
Metal roof sheeting shouldn't have to surrender its shape to accommodate the flashing. Dress the flexible base into the existing roof profile so it follows the contours around the penetration.
Progressive forming helps avoid:
► Bridging over valleys
► Raised edges
► Unnecessary wrinkles
► Uneven base contact
► Distortion around the boot
► Water-catching pockets
Roofing Tools & Accessories provides related equipment for Australian roofing work where preparation, forming & finishing extend beyond the flashing itself.
Take time around pronounced ribs rather than trying to pull the entire base flat with fasteners.
Think Like Rainwater
Stand upslope of the penetration for a moment & ask where the next heavy downpour will go. Water approaching from above needs a practical route around the flashing without becoming trapped behind folds, sealant dams or poorly formed sections of the base.
Pay particular attention to:
► The upslope edge
► Roof valleys feeding toward the pipe
► Nearby penetrations
► Sheet laps
► Areas where debris may collect
► Low points around the flange
Australian storms can deliver substantial rain over a short period, making drainage detail just as relevant as contact around the pipe.
A neat-looking installation isn't enough if it unintentionally creates somewhere for water to sit.
Sealant Supports The Flashing – It Doesn't Replace It
A cartridge of sealant isn't a substitute for a correctly selected roof penetration flashing. The sealing compound, flexible base & mechanical fasteners need to work as an installation system.
Preparation may include:
► Cleaning the roof contact area
► Removing loose debris
► Checking the sheet surface
► Clearing drilling swarf
► Confirming sealant compatibility
► Following the Dektite instructions
► Following the sealant manufacturer's requirements
Don't assume every roofing sealant is compatible with every flashing, coating or roof material.
Product-specific requirements should guide the selection.
Fastener Choice Matters Around The Perimeter
Securing the flange introduces multiple small fixing points around one large roof penetration. Each one needs to support the flashing without creating poorly sealed penetrations of its own.
Follow the applicable Dektite fastening instructions for the particular installation.
Roofing Nails & Fasteners provides a related category for roofing projects requiring additional fastening hardware.
Work progressively around the flange so the base remains formed against the roof profile rather than tightening isolated points aggressively.
Even compression & controlled positioning are more useful than trying to pull a poorly formed base into shape with the final fasteners.
EPDM Selection Starts With The Actual Service
A plumbing vent, extraction pipe & heated flue can share a similar diameter while presenting very different operating conditions. That's why pipe size should never be the only information used to choose a flashing.
Bremick identifies this documented Dektite family as EPDM boot flashings.
For every penetration, consider:
► What passes through the pipe
► Normal operating conditions
► Potential temperature exposure
► Roof environment
► Manufacturer requirements
► Building-service requirements
► Whether a different flashing material is specified
Higher-temperature penetrations deserve specific product verification rather than assumptions based on the appearance of the boot.
Retrofit Jobs Should Be Planned From The Top Down
Existing services have a habit of being easiest to understand once you're standing beside them. Cowls, brackets, bends, electrical connections or fixed pipework can all change whether a standard pull-over approach is practical.
Bremick's Combo configuration is particularly relevant because it is documented for new-build & retrofit applications.
Before purchasing for existing roofing, establish:
► Access above the penetration
► Whether the service can be disconnected
► Obstructions above the roofline
► Available working space
► Condition of the existing sheet
► Size of the existing roof opening
► Whether previous flashing materials need removal
This turns a repair from “find something that fits” into a planned flashing replacement.
Roof Access Is Part Of The Job
The flashing might fit in one hand; reaching it safely can be the larger task. Roof height, pitch, sheet condition & surrounding site conditions all affect how the work should be approached.
Roof Access Equipment provides related access options for suitable trade applications, while Safety Harnesses & Fall Protection covers equipment associated with working-at-height systems.
Use equipment appropriate to the task & follow applicable Australian workplace requirements, site procedures & manufacturer instructions.
A small roof repair doesn't make the working-at-height risk small.
Check The Sheet Around An Existing Leak
Water appearing beside a pipe doesn't automatically prove the boot itself is the only problem. Older penetrations can involve deteriorated sealant, loose fasteners, corrosion, damaged sheet, oversized openings or poorly positioned previous flashings.
During replacement work, inspect:
► Roofing immediately upslope
► Existing fixing holes
► Sheet condition
► Previous sealant
► Corrosion around cut edges
► Damage beneath the old flashing
► Available base coverage
Replacing a boot without understanding the surrounding defect can leave the original leak path untouched.
Keep Swarf Out Of The Finished Roof
Tiny metal filings can outlast the five minutes it takes to create them. Cutting or drilling metal roofing can leave swarf around the penetration, particularly during new installations or repairs involving additional fasteners.
Remove:
► Drill filings
► Cut metal fragments
► Old fasteners
► Wire pieces
► Sealant offcuts
► Rubber trimming waste
Clean workmanship protects the surrounding roof finish & makes final inspection easier.
Inspect From More Than One Angle
The best final view isn't always the one directly above your knees. Move around the completed Dektite where safe access permits & inspect how the base follows the sheet from the upslope, downslope & side directions.
Look for:
► Consistent pipe contact
► Properly formed base edges
► Unwanted lifting
► Gaps beneath the flange
► Fastener seating
► Sealant continuity
► Drainage obstructions
► Leftover debris
That final visual check can reveal a raised edge or awkward fold hidden from the original working position.
Expert Tips
Make the flashing decision on the ground before turning the roof into a measuring station.
► Record the pipe outside diameter before ordering
► Identify whether Premium or Combo suits the access situation
► Check the exact Dektite size range rather than relying on pipe names
► Confirm service conditions before assuming EPDM is appropriate
► Read the moulded cutting guide twice before trimming
► Form the base into the roof rather than forcing the roof flat
► Preserve the natural drainage path around the penetration
► Use compatible sealing products & the specified fastening method
► Remove swarf, trimmed EPDM & old sealant before finishing
► Photograph or record the installed product where future maintenance teams may need identification
The Jobsite Doesn't Forgive. We Do. offers a broader look at the realities of trade equipment, jobsite demands & support when work doesn't go exactly to plan.
