In general it is not a good roofing practice to overlay a traditional asphalt shingle roof versus a complete tear off and replacement with a new roof for the very reason you stated.
Roof overlay vs replacement.
In the case of overlay installation none at all.
A roof overlay is when new asphalt shingles are installed over the existing asphalt shingles with no proper installation of ice and water and underlayment.
This saves money in clean up costs and dumpster rental adding to your total savings.
Any roof replacement will create some leftover junk but there is a big difference between the trash removal involved in an overlay versus a tear off.
On average a roof overlay will cost around 600 less than a full roof replacement.
That kind of trash disposal can add up.
Lasts longer on that note a full tear off roofing job will last you much longer than an overlay will.
A roof over saves time because the crew doesn t need to strip existing shingles and dispose of them.
That s less time you ll need to spend out of the house saving you money and stress.
The crew doesn t need to pile up old roofing materials as they work.
The difference between overlay and tear off installation methods is in how much of the old roof is going to be removed before the new roof is installed.
Less invasive and expensive than a complete re roofing mobile home roof.
8 great mobile home roofing tips find and repair leaks.
This video may help too.
What does re roofing involve.
The new roof is installed over the old one.
When you tear off a roof you basically have to dispose of the entire roof which can involve filling multiple dumpsters of trash.
Roofing overlays only provide homeowners with a fresh new layer of shingles false sense of security and a bigger expense down the road.
Shorter work timeline an overlay can be finished days sooner than a tearoff.
A roof overlay is far less messy than a roof replacement.
Re roofing is the quickest and least costly way to restore your roof s appearance.
Better quality since the entire roof is being replaced roofers will be able to repair high risk areas and new flashings can be installed ensuring that your home is watertight for years to come.
Some homeowners choose this method because it eschews tear off and disposal costs.
Typically trash disposal is included in your overall estimate for the roof replacement.
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Less expensive since you re just replacing the new layer of shingles over the existing ones the labor cost would be lesser and makes this method cheaper.
During re roofing a new shingle overlay is placed over your worn shingles to restore the look of your roof as well as provide a protective layer to help prevent leaks from getting inside your home.
If the roof on your mobile home is beginning to show its age consider correcting the problem with a roof over.
Less time spent again since you re doing a lesser amount of work than the tear off you would take less time to complete the overlay.
You can t examine the decking to determine if there is any damage that needs repaired.
If you don t take your roof down to the sheathing you will never know if you have proper underlayment or are experiencing sheathing rot or ice or water damage.
If you re planning on completely replacing your roof within the next five to 10 years an overlay is a practical way to enjoy the look of a new roof in the meantime.
