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How to fit a gutter guard

Updated: 23 October 2026

You have chosen an outlet insert or the mesh roll, and you are fitting a gutter guard without forcing it or resting the ladder on the plastic. The order is short: decide whether you should be up there, clear the outlet, check the hole, seat the guard so water can still enter, pour a jug, and get down. Which listing to buy stays on the [gutter protection comparison](/hub/diy-supplies/gutter-protection). The saved listings and the Health and Safety Executive work-at-height pages are from 21 October 2026. These guards were not fitted for this page. A qualifying purchase can earn a commission at no extra cost to you.

You have chosen an outlet insert or the mesh roll, and you are fitting a gutter guard without forcing it or resting the ladder on the plastic.

Our top picks

DIVCHI DIVCHI 5 m mesh

Best overall

DIVCHI DIVCHI 5 m mesh
6.0/10about £11.99
View offer
LAOJU LAOJU aluminium strainer

Best value

LAOJU LAOJU aluminium strainer
9.0/10about £6.99
View offer
Merriway Merriway 68 mm balloon

Rank 3

Merriway Merriway 68 mm balloon
8.8/10about £5.25
View offer
On this page
  1. 1.Before you climb
  2. 2.Clear the outlet and check the hole
  3. 3.Seat a balloon or a strainer
  4. 4.A mesh roll is a different fit
  5. 5.When to stop

Before you climb

The Health and Safety Executive says avoid work at height where you can, and do not rest a ladder on plastic gutters. A ladder, if you must use one, is for light work of short duration. Stay off the top three rungs. If the only resting point is the gutter itself, stop. Count the outlets before you climb. Merriway is two balloons. LAOJU is four. Graplan's title says six and the components line says four. LAOJU does not include ties.

Clear the outlet and check the hole

Clear leaves, silt, and moss from the outlet before you seat anything. Debris holds a guard proud of the opening, or it washes down and blocks the pipe. If the gutter joint has dropped, the fascia is soft, or water is already staining the wall indoors, you are no longer fitting a guard. Merriway states 68 mm round and does not state 65 mm square. LAOJU states a diameter you can extend up to 7.5 cm and does not print 68 mm. If you are still holding an inch guess, use the 68 mm downpipe leaf guard page. Do not enlarge a plastic outlet so a 45 mm cap looks close.
DIVCHI DIVCHI 5 m mesh

Testsieger

DIVCHI DIVCHI 5 m mesh
6.0/10about £11.99
View offer

Seat a balloon or a strainer

A balloon goes in as a push fit. On the Merriway listing you place it over the outlet and press the flexible legs in. There are no screws and no separate fixings. Seat it so it cannot wash out, and do not fold it so flat that the slots close. If the balloon feels smaller than the hole, stop. Shape an aluminium strainer slightly smaller than the pipe and secure it. LAOJU reviews say pieces blew out when only wedged, and buyers added ties that were not in the box. Pushing a 2.4–2.6 inch dome harder does not make it a 68 mm hole.

A mesh roll is a different fit

The only trough mesh here is the DIVCHI roll, 5 m by 15 cm, with eight stakes, at £11.99. Cut it to the gutter section. The fork between that roll and an outlet insert is on gutter mesh or balloon. Pour water after the guard is seated. It should run into the outlet and down the pipe, not over the front lip.

When to stop

Stop when the ladder would bear on the gutter, when the work is no longer light and short, or when the fascia is rotten, you may touch asbestos-cement, or the facade is listed. Stop when water is already indoors. A leaf guard does not put a gutter back on the wall. A wash every 6 to 12 months is trade advice for a FloPlast balloon, not a result on these ASINs. If the count in the box is wrong, come down and sort it on the ground.

Common questions

Do I clean the gutter before I fit the guard?
Yes. Clear leaves, silt, and moss from the outlet before you push anything in. Debris left in the hole holds the guard proud or washes into the pipe underneath it. If the gutter has pulled away from the fascia, cleaning it is not the job. That is a repair, and it is the point to stop.
How does a balloon go in?
On the Merriway listing you place the balloon over the outlet and press the flexible legs in. There are no separate fixings and no screws. Seat it so water can still enter the slots, and so it cannot wash out. If it feels smaller than the hole, stop. The listing states 68 mm round and does not tell you to force it into a square outlet.
How do I stop an aluminium strainer popping out?
Shape it slightly smaller than the opening and secure it. LAOJU reviews say mesh blew out when it was only wedged, and buyers added cable ties that were not in the box. The bullets warn of sharp edges. Separate nested pieces on the ground. Graplan lists ties and also says tool-free, so use the ties when a wedge will not hold. A push-in balloon is a different fixing.
Are tools required?
It depends on the listing. Merriway is a push-fit with no separate fixings. Katai says compress and release, with no screws or sealant. LAOJU says secure the strainer and does not include ties. Graplan says tool-free and also lists cable ties. The 45 mm cap says adjust by hand or with tools, and wear gloves. Take gloves where mesh edges are mentioned.
How do I know it is working?
Pour water into the trough. It should enter the outlet and come out at the bottom of the downpipe, not over the front lip. If it spills, the guard is proud, the mesh is blocked, or the fall is wrong. If nothing appears at the shoe, the opening is closed or debris has gone down the pipe. Lift the guard and reseat it. A star rating is not this test.
Can I lean the ladder on the gutter?
No. The Health and Safety Executive says do not rest a ladder on plastic gutters, and avoid work at height where you can. A leaning ladder needs a strong resting point, you stay off the top three rungs, and the job stays light and short. If the only access is the gutter itself, call someone.

Related pages

Gutter guard buying guide

Gutter protection

68mm downpipe leaf guard: which size line meets it

Best gutter guard UK: the 68 mm pick and best value

Gutter mesh or balloon when the front lip overflows

Sources

Public UK sources and the amazon.co.uk listings compared on this page. Listings captured 21 October 2026. Updated 23 October 2026.

  1. Approved Document H (retrieved 23 October 2026)
  2. Scottish technical handbook 3.6 (retrieved 23 October 2026)
  3. HSE: working at height (retrieved 23 October 2026)
  4. HSE: ladders (retrieved 23 October 2026)
  5. Consumer Rights Act 2015, sections 9 and 11 (retrieved 23 October 2026)
  6. FloPlast half-round gutter (retrieved 23 October 2026)
  7. HR Wallingford SR620 (retrieved 23 October 2026)
  8. Screwfix FloPlast balloon, 65 mm and 68 mm (retrieved 23 October 2026)