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Roofing felt for sheds

Updated: 23 October 2026

A catalogue shed is 8×6, a 5 m roll looks as if it ought to cover it, and the floor size is the wrong picture. Roofing felt for sheds is a coverage question before it is a brand question. A lap is not optional, an apex is two slopes plus a cap, and one of the three Rose Roofing listings will not tell you the width. This page stops at whether you have enough roll. The [roofing felt comparison](/hub/diy-supplies/roofing-felt) is the three rolls Products Compared kept, from the amazon.co.uk capture on 19 October 2026. Merchant tables are those shops’ estimators, not a British Standard. A qualifying purchase can earn a commission at no extra cost to you.

A catalogue shed is 8×6, a 5 m roll looks as if it ought to cover it, and the floor size is the wrong picture. Roofing felt for sheds is a coverage question before it is a brand question.

Our top picks

Rose Roofing Rose heavy duty green, 5 m

Best overall

Rose Roofing Rose heavy duty green, 5 m
7.8/10about £28.50
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Rose Roofing Rose standard black mineral, 5 m

Best value

Rose Roofing Rose standard black mineral, 5 m
7.4/10about £21.40
View offer
Rose Roofing Rose green 6 m, 12 kg

Alternative

Rose Roofing Rose green 6 m, 12 kg
6.4/10about £22.48
View offer
On this page
  1. 1.Measure the slopes, not the floor
  2. 2.What a 5 m roll can and cannot cover
  3. 3.Hutches, kennels, and log stores
  4. 4.Refelting is not a planning application

Measure the slopes, not the floor

An 8×6 is a floor, usually in feet, of about 2.4 m by 1.8 m. The roof is larger. A pent is one slope: the sloping length, plus an overhang at the eaves and a turn at the top. An apex is two slopes plus a cap. B&Q uses about 50 mm at the eaves and 75 mm at the gable. IKO and Rose’s trade sheet both use a minimum lap of 75 mm on the products those sheets describe. If the sheet is 1 m wide, a slope 1.4 m from eaves to ridge needs two strips. The hammer sequence is on how to lay shed roofing felt.

What a 5 m roll can and cannot cover

The standard black roll and the heavy-duty green roll both state 5 m × 1 m. That is 5 m² of sheet before laps and overhangs. It is not 5 m² of finished roof. Ashbrook’s estimator sends a 6 ft × 4 ft shed to an 8 m roll and an 8 ft × 6 ft shed to a 10 m roll. A pent slope about 2.2 m long gives only two strips from 5 m once you add overhangs. Do not claim that one 5 m roll covers a 6×4. The green 6 m roll, model 339159, prints no width. Until you know, you must not call it 6 m². On best shed roofing felt that roll is a skip unless the width is already known.
Rose Roofing Rose heavy duty green, 5 m

Testsieger

Rose Roofing Rose heavy duty green, 5 m
7.8/10about £28.50
View offer

Hutches, kennels, and log stores

The 6 m bullets name sheds, hutches, and kennels. A 5 m × 1 m roll can cover a hutch if you measure the lid, add the turn-down, and still have a lap. The black roll still prints 20 degrees. A flat hutch lid does not become acceptable because the building is small. The checks that are not about area are on the shed roofing felt buying guide.

Refelting is not a planning application

A new sheet on a shed you already have is maintenance. Green instead of black is not a planning application. Felt does not answer building regulations, and this page does not invent a height figure. A slept-in or attached building is outside these listings. If the deck is rotten or the roof is too high to work safely, the roll length is no longer the decision.

Common questions

Is 5 m × 1 m enough for my shed?
It is 5 m² of sheet, not of finished cover. Ashbrook’s Rose table points a 6 ft × 4 ft floor at an 8 m roll and an 8 ft × 6 ft floor at a 10 m roll. A small pent, a hutch, or a log-store lid can fit if you count strips, laps, and overhangs and still have length. A typical apex 8×6 usually does not, once both slopes and a ridge cap are included.
Why is the floor plan the wrong measurement?
The floor ignores the pitch. The roof is one or two slopes, plus eaves overhangs, gable folds, and laps of about 75 mm on the UK sheets that print that figure. You buy strip length times the number of strips. A casual 10 per cent on the floor area can still leave the last course short, because offcuts are not a full-width run.
What changes between a pent roof and an apex?
A pent is one slope, measured along the fall, with a turn at the top. An apex is two slopes plus a cap over the ridge, lapped onto both sides. The cap uses more length than doubling the floor. The same 5 m roll therefore covers less building on an apex than on a pent of the same floor size.
Can the same roll go on a hutch, a kennel, or a log store?
Yes, if you measure the lid and the pitch suits the listing. The 6 m bullets name hutches and kennels, and reviews mention a rabbit hutch, a log store, and a wood shed. The black roll still asks for 20 degrees. A flat lid fails that bullet. One review of the 6 m sheet says bird-box roofs failed within a month, so a tiny roof is not automatically an easy one.
The 6 m roll is longer. Is it more cover?
Only if it is wide enough, and this listing does not say. B071G5NLXH prints 6 m and 12 kg at £22.48 and leaves the width out. Longer than 5 m is not more square metres than 5 m × 1 m. Confirm the width outside the file before you count it as the roll that finishes an 8×6.
Do I need building regulations to refelt a shed?
Refelting an existing shed is maintenance. The Planning Portal summary used here says building regulations normally skip a detached building under 15 m² with no sleeping, with extra conditions from 15 m² to 30 m². The nations of the UK do not share one page. Choosing a felt does not grant consent, and it does not turn a slept-in or attached building into a shed. Height and position for a new outbuilding are a separate GOV.UK question.

Related pages

Standard vs heavy duty shed felt

Roofing felt

Best shed roofing felt: top pick and best value roll

Shed roofing felt buying guide for UK outbuildings

How to lay shed roofing felt on a small timber roof

Sources

Public UK sources and the amazon.co.uk listings compared on this page. Listings captured 19 October 2026. Updated 23 October 2026.

  1. BSI, BS 8747:2007 reinforced bitumen membranes (retrieved 23 October 2026)
  2. NBS, specifying reinforced bitumen membranes (retrieved 23 October 2026)
  3. Saunders, BRE, 2008, bitumen roofing history (retrieved 23 October 2026)
  4. Rose Roofing, standard shed felt (retrieved 23 October 2026)
  5. Rose Roofing, premium polyester shed felt (retrieved 23 October 2026)
  6. GOV.UK, Class E permitted development technical guidance (retrieved 23 October 2026)
  7. Planning Portal, building regulations for a detached house roof (retrieved 23 October 2026)
  8. HSE, roof work (retrieved 23 October 2026)
  9. Toolstation, Rose 5 year standard shed felt (retrieved 23 October 2026)