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Most manufactured homes leave the factory without them, which is why so many owners assume mobile home gutters are optional. They are optional in the sense that nothing will fall down next week.
The reason to fit them has almost nothing to do with the roof. It has to do with what the roof water does to the ground your piers are standing on.
Why they were left off
Gutters add to the overall width and height of a home in transit, and that can push it into a different transport permit bracket. Manufacturers omit them and keep the eave overhang short.
That short overhang is also why retrofitting is awkward, and it is why runoff lands so close to the wall in the first place.
The real argument for mobile home gutters: your piers, not your shingles
A manufactured home does not sit on a foundation. It sits on piers, and each pier bears on a footing pad resting on soil.
Roof water falling off a short eave lands at the skirting line and soaks into exactly that soil. Saturated soil loses bearing capacity. Piers settle unevenly, and wet ground is also what loosens the anchors holding the home down. The home goes out of level, doors start to stick, and the fix is a releveling job rather than a downpipe.
There is a second-order problem too: wet ground under the home means anchors can loosen, which is a safety matter rather than a comfort one. And the sequence matters — a home should be releveled after the water is dealt with, not before, or the soil re-compacts and the home settles crooked again.
That is the case for gutters on a manufactured home in one paragraph: they are a foundation maintenance item wearing a roofing costume.
What the federal standard requires about the water
Gutters themselves are not mandatory. Drainage is.
24 CFR 3285.203, site drainage, requires that “drainage must be provided to direct surface water away from the home to protect against erosion of foundation supports and to prevent water build-up under the home.”
It gives a number: the site must slope a minimum of half an inch per foot away from the foundation for the first ten feet. Where that grade is not achievable, drains or swales are accepted instead. Sites where water collects under the home need drain tile or a sump.
And it closes the loop on gutters specifically: where gutters and downspouts are installed, the manufacturer’s instructions must require runoff to be directed away from the home.
If your ground does not fall half an inch per foot for the first ten feet, gutters are treating a symptom. Fix the grade first.
What is different about the installation
There may be nothing to screw into. Many manufactured homes have no fascia board, or a token one. Hangers go into the rafter tails or the roof edge itself. Where there is a drip edge, the gutter goes behind it, not under it.
Sizing is conventional. Five-inch K-style aluminium is the standard, six-inch where roof area and rainfall justify it — the same rule as any house.
The downspout is where the job succeeds or fails. Discharge at least five feet from the home, using solid pipe extensions rather than the flexible accordion type, which silt up. Splash blocks, buried pipe or a rain barrel at the end, and plan each outlet so it does not carve a channel of its own.
Taking the water three feet from the skirting and letting it go is not an improvement on having no gutters. It concentrates the same water into fewer places.
Cold climates
Gutters do not cause ice dams — attic heat loss melting snow does. But once a dam is forming, a clogged or badly pitched gutter makes it worse, because standing water freezes faster than moving water.
On a low-slope manufactured home roof that is worth taking seriously. Keep them clear, pitch them properly, and consider guards.
What it costs
Seamless aluminium runs roughly $9 to $14 per linear foot installed. Sectional aluminium comes in around $3 to $5 a foot cheaper.
To turn that into a number you need your linear footage. Gutters normally go on the two long eaves only:
| Home | Typical size | Gutter run |
|---|---|---|
| Single-wide | 16 × 80 ft | ≈160 linear ft |
| Double-wide | 28 × 60 ft | ≈120 linear ft |
Real-world quotes reported for seamless aluminium: $650 to $1,200 for a single-wide and $1,100 to $2,000 for a double-wide. Those sit below the per-foot arithmetic, which is normal — a straight run with no corners, valleys or second storey is a fast job.
Against a releveling bill, it is cheap. Releveling is the thing gutters are actually competing with.
Common questions
Will the park let me?
Usually, but park rules govern exterior alterations and vary. We found no evidence that either requiring or prohibiting gutters is an industry norm — it is park by park. Ask before you buy materials.
My home has no overhang at all. Can I still fit them?
Yes, though the hanger has to pick up the roof edge rather than a fascia, and getting the gutter far enough out to catch the water can need a drip edge extension.
Should I do the whole perimeter?
The long eaves are where the water comes off a pitched or arched roof. The ends usually gain nothing.
Do gutters help with a leaking roof?
No. They move water that has already left the roof. A leak is a separate job.