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4 Most Common Questions about Mobile Home Roofs

The roof is one of the home most important elements of a mobile home or any home for that matter. A healthy roof is a healthy house. These 3 common questions about mobile home roofs cover some of the most popular questions and issues for both flat roofs and pitched roofs that we’ve received over the years.

First, we cover roof rumble and what your best option is to stop it and what not to use (rumble buttons). Second, we cover a leak from an unknown origin. Finally, we cover how to best handle roofs when building a mobile home addition.

Ask a Mobile Home Expert Questions about Mobile Home Roofs and New Roofs

Are there any structural issues with putting roof trusses and a new roof on a mobile home? Did you have to provide structural calculations or anything? I heard that they are not designed to hold much weight.

Every inch of the home is designed specifically for the home’s layout starting at the chassis which is curved to balance and distribute the weight of the home perfectly. Mobile homes use lateral roof trusses that go from one side of the home to the other and rest right on top of the sidewalls.

Short story, no, you will not be able to add any additional weight to your home without beefing up its structural integrity or giving the weight its own support.

A roofing professional can inspect your home and let you know whether your idea is feasible. Chances are slim though unless you use a post and beam design like the one shown below.

In many cases, roofers install new posts right against the home every few feet to bear the load for the new roof. It allows for a new roof without adding additional stress to the home. Read more about self-supported mobile home roof overs here.

Mobile Home Roof Over Foam Celotex Insulation Attached To A Mobile Home 500x264 1

Related: Three Popular Mobile Home Roof Over Materials 

Questions about Mobile Home Roofs: Whistling and Howling Sounds

I would like a solution for the whistling and howling noises when it’s windy and storming.  Sounds like it will blow away. Can you help me?

You are experiencing what is called ‘roof rumble.’ Unfortunately, it happens quite a bit with flat metal roofs. Metal roofs are made with 28-gauge galvanizes steel that is usually 4-foot wide and as long as the home is wide. The least little bit of wind can find its way under these metal sheets and you get roof rumble. It can be annoying!

Leave the Tires for Under the Home

There have been many solutions and recommendations for quieting roof rumble on a mobile home. If you’ve ever seen tires sitting on top of a mobile home you’ve seen one remedy. The tires supposedly keep the wind from tunneling under the metal and also dampen the sound. This is your old school problem-solving and it can fix roof rumble but it can create much larger problems in the process. Tires are heavy and water gets in them which makes them even heavier. Standing water can also sneak under the metal and get into your ceiling and walls.

No Rumble Buttons, Please

There are screws you can use called rumble buttons but they create holes in your roof and that’s never a good idea. I don’t recommend adding holes in a roof even if you will be sealing and coating over them.

Sealing and Coating is the Best Way to Fix Roof Rumble

The best way to handle roof rumble is to stop the wind from getting under that metal. One way to do that is to seal the seams and edges and then coat the entire roof with an elastomeric roof coating. The white acrylic liquid is a popular solution. Pay particular attention to the edge of the roof.

It is recommended that you coat your mobile home’s flat roof every other year anyway.

Questions about Mobile Home Roofs: Moisture and Leaks 

I bought my home in 2009. In 2013 we noticed when it rains we get moisture at the bottom of our living room, dining room, and master bath walls. The insurance adjuster said that we had flashing issues along the front of the home and said it’s the manufacturer’s issue and to call the insurance company. Unfortunately, the insurance company said this type of damage is not covered. Does anyone know how I can have this issue fixed? When it rains a heavy downpour we have moisture. Although not every time, we have had the problem a few times.
Please help!

I’m sorry you are experiencing this but it’s absolutely fixable. An experienced roofer can probably find the issue in no time.

It’s probably going to be a shingle, gutter, or flashing issue that is allowing the water to travel the path of least resistance down to your floor. It could also be a window issue (assuming there is one in that location). I can’t help much without seeing the issue.

It absolutely needs to be repaired ASAP. Otherwise, you risk some even greater damage to your home. It’s one of those situations where you pay $1000 to fix it today or $5000 or more to fix it next year.

If you don’t have gutters on the home you may want to consider installing them after you have this issue repaired as it helps carry water away from the side of the house.

Related: 8 Great Mobile Home Roofing Tips – Find and Repair Leaks

Remodeled Manufactured Home Inspiration - addition ideas - questions about mobile home roofs

Putting A Roof on My Addition

I have a question about building an addition to my single wide mobile home in Delaware. I am building a 14′ × 23′ addition onto the front side of the mobile home. The mobile home is sitting on blocks under the two main I beams. I’m not attaching the addition walls to the mobile home and the roof will extend above the mobile home roof due to trying to keep the floor level the same as the mobile home. Can the A-frame addition roof be attached to the mobile home?
Susan L.

How you handle the roof connection from the addition to the home is usually the trickiest part of any addition build for a manufactured home.

Using the word ‘attached’ is a bit misleading when it comes to mobile home additions because the structures must be completely self-supporting. You will be attaching/sealing the two structures but not in a way that any load bearing is affected.

To seal the addition and the mobile home a valley will be created where the home and addition meet. You will then use flashing and shingles to give the water a path to follow. Roofers use different cuts to create a valley. The valley weave and California cut are probably the most popular.

This image represents a popular roofing technique to handle a mobile home and addition that is lower than the home. Notice how weatherstripping and insulation are flashing are used to create the seal.

questions about mobile home roofs how to seal an addition to a mobile home roof

Related: Guide to Building Mobile Home Additions

Do you Have Questions about Mobile Home Roofs?

We hope we have been able to answer some of your questions about mobile home roofs.

If you have questions about mobile home roofs please feel free to comment below and we will see if we can find you an answer.

Check out next week’s “Ask A Mobile Home Expert” when we take a look at mobile home sub floors.

And as always, thanks so much for reading Mobile Home Living!

Disclosure: Any answers to questions posed and any recommendations or information provided herein should not be used as a substitute of an expert or any relevant professional that has inspected the issues in person.

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Kim Alley

Kim Alley

Kim Alley has been a part of Mobile Home Living since 2017 and has written over 300 articles for the site.