The best barge flashings, compared.
Top pick: Winfox aluminium flashing roll 0.2 mm Best value: Target Control silver butyl 100 mm x 5 m – Next score after the top pick, and the lowest shelf price in the set at about £11.39. About £2.28 a metre, so it is not the lowest price per metre. Updated 22.10.2026.
A barge flashing, on a UK metal roof, is a folded cover at the gable or corner, usually a 90-degree piece about 0.7 mm thick in 3 metre lengths, with wings around 150 mm or 200 mm. A tiled house does not finish that edge with a steel barge. The tile edge needs a dry verge to BS 8612, or a wet verge that is also mechanically fixed under BS 5534. Lead belongs on abutments and chimneys as short 4 pieces, not as the verge cap. How to choose a folded barge, a dry verge or repair tape is in the [barge flashing buying guide](/hub/diy-supplies/barge-flashing/sub/barge-flashing-buying-guide). Cladco's barge datasheet gives 0.7 mm and a safety welt, and its installation notes call for a minimum 200 mm overlap with screws in the crest, not the pan. 7.2.19 describes a wet verge as a 100 mm mortar bed on an undercloak at least 150 mm wide. Plain tiles are not an undercloak on a bargeboard or below 30 degrees. Projections are 38–50 mm for plain tiles or 30–60 mm for interlocking tiles.
A barge flashing, on a UK metal roof, is a folded cover at the gable or corner, usually a 90-degree piece about 0.7 mm thick in 3 metre lengths, with wings around 150 mm or 200 mm.
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Personal buying guide
Question 1 of 2
What are you trying to cover?
The Winfox listing, model 1LPWINFOX2504, is a flat aluminium coil titled 4 inches by 20 feet and 0.2 mm thick, at £14.99, with 4.8 from only 12 amazon.co.uk reviews. Seven review blocks are in the saved listing. One buyer used it on an outside roof and called the thickness good for that job, and more than one notes that gloves were in the box. The same texts say the edges are sharp, scissors will not cut it, and one buyer cut themselves on a dented start of the roll. The package line says 5 x 3 x 3 cm and 100 g, which cannot be a 20-foot coil if the title is right, and one review writes 4 inches by 20 inches instead. It is not self-adhesive, and the bullets do not give a screw pattern. At 0.2 mm it sits well below the 0.7 mm folded barges UK sheet-roof makers publish, so a high star line on twelve reviews does not make it the barge in this search. Treat it as a small non-adhesive offcut only after you confirm the length on arrival.
Pros
Cons
Best for: A small aluminium piece you will cut with proper tools and gloves, after you confirm whether the roll is 20 feet or the shorter length one review describes.
Less suitable: A 3 m sheet-roof barge, a self-adhesive lead repair, or an order you place before the listing size fields agree.
Specifications
Common questions
Is this a barge flashing?
No. It is a flat aluminium coil. The title says 4 inches by 20 feet and 0.2 mm, for roofs, sheds, windows, and doors.
Can you cut it with scissors?
The bullets say it is easy to cut. A UK review says scissors will not cut it and that the edges are sharp. Reviews also say gloves were in the box.
Do the size fields agree?
The title says 4 inches by 20 feet. The package line says 5 x 3 x 3 cm and 100 g. One review writes 4 inches by 20 inches. Those figures are not reconciled.
The Bostik Flashband roll, model 30816347, is a grey self-adhesive bitumen tape at 100 mm by 10 m, listed at £13.34 on amazon.co.uk with 4.4 from 5,102 reviews. In the 50 review texts stored for this ASIN, people who had used Flashband before often say it seals a cracked flat roof or a stack pipe that silicone had already failed to hold, once the release film is off and the strip is pressed with a seam roller. The bullets name repairing lead flashing, sealing valley gutters, and mending leaks in drainpipes and guttering, and they say it bonds to brick, masonry, slates, metal, terracotta tiles, and roofing felt. The catalogue material line says lamination, the adhesive field says bitumen, and the weight line says 100 g against a stated 1.0 square metre, so those fields do not agree. One verified review used the recommended primer on a lean-to junction and still saw the tape slip after about four to five months, with heavy rain getting in. The backing film is a repeated complaint, and that slip review treats a vertical wall as a harder job than a flat patch. It is the top pick in this set when the job is a named lead or felt repair, and it is not a folded 90-degree barge.
Pros
Cons
Best for: A clean, dry patch on lead, felt, or a gutter the listing names, when you can press it with a seam roller and you are not covering a gable with a folded barge.
Less suitable: A 3 m sheet-roof barge, a tiled verge, or a vertical lean-to where a previous strip already slipped.
Specifications
Common questions
Is this a folded barge flashing?
No. The amazon.co.uk title is Bostik Flashband self-adhesive flashing tape, grey, 100 mm by 10 m. It is a bitumen roll, not a 90-degree metal barge.
What does the listing say it is for?
The bullets say repairing lead flashing, sealing valley gutters, and mending leaks in drainpipes and guttering. They also say it bonds to brick, masonry, slates, metal, terracotta tiles, and roofing felt.
How do you apply it?
The bullets say hand pressure and a seam roller, with no special equipment. Whether it can be painted is asked on the listing and not answered there.
The Target Control roll, model TCB-101, is a silver self-adhesive tape at 100 mm by 5 m, listed at £11.39 with 4.4 from 753 amazon.co.uk reviews. In the 50 review texts stored for this ASIN, early comments are a pond liner that still held after several months, a freezer drawer, and a small pipe leak, rather than a roof verge. Reviewers who press it down call it thick and hard to peel, and one says the butyl beds in more once the sun is on it. The bullets sell it as roof flashing tape for felt, sheds, gutters, and caravans, while the material line says ethylene propylene rubber and the adhesive line says butyl. The listing's upper temperature is 45°C. Tack falling away as the roll is unpeeled shows up as a complaint, so later lengths can be less sticky than the first. At about £2.28 a metre it costs more per metre than the 10 m Bostik roll, even though the shelf price is lower, and roof-verge use is scarce in the sample. It is a sticky household repair tape in this set, and a weak match if you came for a barge or a named lead repair.
Pros
Cons
Best for: A short silver roll for a small leak you can press by hand, after you have read that the review file is mostly not roofs.
Less suitable: A lead-flashing repair you want named on the listing, a folded barge, or a hot roof where the 45°C listing cap is a real limit.
Specifications
Common questions
Is this a barge flashing?
No. It is a 5 m by 100 mm silver butyl roll. The bullets call it roof flashing tape for felt, sheds, gutters, and caravans.
What do the reviews actually use it on?
In the saved reviews, early comments are a pond liner, a freezer drawer, and a small pipe leak. Roof-verge use is scarce in that sample.
What temperature does the listing give?
The upper temperature rating on the listing is 45°C. Paintability is asked and not answered.
Shelf prices are the figures stored from the amazon.co.uk saved listings on 19 October 2026. The score uses those three listings and the review notes already stored for those ASINs. This is not a laboratory test, and no roof was fitted. A star row is amazon.co.uk's figure. A millimetre or a temperature is the seller's claim, or a maker's published figure named in the research. Where the title and the catalogue disagree, both are kept and the conflict is a deduction. None of the three is a folded 90-degree barge. The highest score is the top pick. That 10 m roll is also the lowest price per metre, so the best-value badge goes to the next score: Target Control, on the lowest shelf price of about £11.39.
Amazon evidence
30%Star rating on amazon.co.uk, then the review count. 4.4 from 5,102 carries this block. 4.8 from 12 does not, because the count is too small.
Spec fit
25%A stated job that matches a flashing repair, with size lines that agree. A named lead-flashing repair scores higher. An EPR line against a butyl line, a 45°C cap, a 0.2 mm title, and a pack size that fights a 20-foot title are deductions. A folded barge is not in the set, so nobody scores as one.
Review outcome
25%UK comments about a flat roof, a stack pipe, or a gutter score for the job they describe. A primed lean-to that slipped, pond and freezer reviews, sharp edges, and a file of seven texts are deductions.
Value
20%Stored GBP price per metre of tape or coil you can actually use. About £1.33 a metre on the 10 m roll scores as value for a named repair. The £11.39 shelf price does not, because that roll is about £2.28 a metre.
Name the roof before you buy a roll. Profiled metal needs a folded barge. Tiles or slates need a dry verge or a fixed wet verge. A split in sound lead or felt is the only job the tape in this set is honestly for. None of the three amazon.co.uk listings is a 3 metre 90-degree barge. Thickness, overlap, surface temperature and the size of the review sample decide whether a kept listing is even a candidate.
A barge flashing, in UK metal roofing, is a folded cover at the gable or corner. It is usually a 90-degree piece about 0.7 mm thick, in 3 metre lengths, with wings around 150 mm or 200 mm. Cladco's barge datasheet gives 0.7 mm and a safety welt, and its installation notes call for a minimum 200 mm overlap with screws in the crest, not the pan. A tiled house does not finish that same edge with a steel barge. The bargeboard only closes the timber.
On a tiled roof the bargeboard only closes the timber. The tile edge needs a dry verge to BS 8612 or a wet verge that is also mechanically fixed under BS 5534. Tape on the board does not do that job.
UK sheet-roof barges in the sources are about 0.7 mm, in 3 metre lengths, with overlaps of at least 200 mm and screws in the crest. The kept coil is titled 0.2 mm and is not self-adhesive. Twelve reviews are not a lifespan.
The silver roll is 5 m, about £2.28 a metre. Flashband is 10 m, about £1.33 a metre. The lowest shelf price is not the lowest price per metre, and many stored reviews of the silver roll are not roofs.
Name the roof before the product title. Profiled metal needs a folded barge. Tiles or slates need a dry verge or a fixed wet verge. A split in sound lead or felt is the only job the tape in this set is honestly for. Cladco's barge datasheet is 0.7 mm with a safety welt. NHBC 7.2.20 puts aluminium flashing at 0.7–0.9 mm, with bitumen paint both sides if it is built into masonry. The kept coil is titled 0.2 mm, so a star line of 4.8 from 12 reviews does not make it that barge.
Length follows the material. Metal barges in the Cladco notes are 3 m lengths with a minimum 200 mm overlap. Lead flashings are a maximum of 1.5 m, or 1.0 m on asphalt and felt verges, with clips at 300–500 mm. Flashband on long plastic runs is 500 mm pieces with 25 mm laps. If you are buying tape, the face has to be sound, clean and dry. Flashband's sheet gives +5°C to +30°C on the surface, primer on porous or cold faces, and gaps over 3 mm filled.
Three typical situations, each with a recommendation from this comparison.
You have one split in sound lead, felt or a gutter the listing names, at a height you can work safely. Bostik Flashband, 100 mm by 10 m, is the top pick at about £13.34, with 4.4 from 5,102 reviews. Press it on a clean, dry face. It is not a folded barge, and one primed lean-to slipped after about four to five months.
You want the lowest shelf price and you have read that the stored reviews are often a pond, a freezer drawer or a pipe. Target Control silver butyl is about £11.39 for 100 mm by 5 m, with 4.4 from 753 reviews. That is about £2.28 a metre, more per metre than the 10 m Flashband roll. The listing upper temperature is 45°C.
You will cut a flat aluminium piece with proper tools and gloves, and you will check the length on arrival. The Winfox coil is about £14.99, titled 4 inch by 20 foot and 0.2 mm, with 4.8 from 12 reviews. It is not self-adhesive. The pack line says 5 x 3 x 3 cm and 100 g. It is not a 3 m folded barge.
The top pick is Bostik Flashband, 100 mm by 10 m, at about £13.34. It scores 84, the highest here: the listing names lead-flashing, valley and gutter repair, with 4.4 from 5,102 reviews, and about £1.33 a metre. It is held down because it is tape, not a folded barge, because the listed weight of 100 g conflicts with a 1.0 square metre roll, and because one primed lean-to slipped after about four to five months. That roll is the lowest price per metre, at about £1.33, so the best-value badge is not put on it. Best value is the Target Control silver butyl roll at about £11.39, the lowest shelf price in the set. It is 100 mm by 5 m, about £2.28 a metre, with 4.4 from 753 reviews, and many stored reviews are not roofs. The Winfox coil at about £14.99 is titled 0.2 mm, with 4.8 from 12 reviews, and the pack size conflicts with the title.
Target Control silver butyl 100 mm x 5 m
Next score after the top pick, and the lowest shelf price in the set at about £11.39. About £2.28 a metre, so it is not the lowest price per metre.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources and the amazon.co.uk listings compared on this page. Shelf prices read 19 October 2026. Updated 22.10.2026.
This page contains affiliate links. If you buy through them, we may earn a commission at no extra cost to you. Links use the amazon.co.uk tag pcuk26-21. Prices, stars and review counts are the amazon.co.uk figures already stored for this set. This is not a laboratory test.
