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MI Homesiding & Roofing
If you live in Knoxville or anywhere in East Tennessee, humidity is something you deal with every day.
But what many homeowners don’t realize is this:
Humidity is one of the biggest reasons decks fail
Not because the material is bad —
but because the deck was not built to handle moisture.
I’ve seen decks fail in less than 10 years here in Tennessee.
And almost every time, the problem comes down to water.
How We Build Decks the Right Way
In this area, moisture doesn’t just come from rain.
You have:
That means your deck is almost always exposed to moisture.
If the structure is not built correctly:
The wood never fully dries
Water gets trapped
Damage starts from the inside
Most people think:
“Wood just goes bad over time.”
That’s not true.
A properly built deck can last 15–25 years in Tennessee.
What actually causes failure is:
I’ve seen new decks fail faster than old ones — just because they were built wrong.
This is one of the biggest problems I see.
The ledger board connects the deck to the house.
If there is no flashing behind it:
Water goes directly into the wall
Most homeowners don’t see this until it’s too late.
Another very common issue in Knoxville.
This is one of the most dangerous failures.
I see many decks where air cannot flow underneath.
If the deck cannot dry, it will not last.
Very common mistake.
This traps water at the base.
Correct installation keeps the post above ground with proper support.
Not all fasteners are made for exterior use.
We always use structural and exterior-rated hardware.
Even if the deck looks good, the structure may not be.
This is a big one in Tennessee.
If water is not directed away:
It stays trapped
To handle humidity, a deck must be built with moisture in mind.
That means:
This is what most contractors skip.
At MI Homesiding & Roofing, we build decks to handle Tennessee conditions.
We focus on:
I personally walk every project and explain what needs to be done.
Because in this area:
If you ignore moisture, the deck will fail
Most problems are not visible right away.
You might not see damage until it’s already advanced.
Start here:
https://mihomesidingllc.com/deck-inspection-knoxville-tn/
Homeowners here are frustrated with:
What we do different:
This is a family business, and every project matters.
We serve:
We understand the local climate and how it affects your home.
Because of constant humidity, poor drainage, and improper installation.
Yes. Humidity keeps wood wet longer, which leads to rot.
Sometimes. If the structure is still solid, repairs are possible. Otherwise, replacement is safer.
Soft wood, mold, movement, or discoloration are common signs.
Yes — if it’s built correctly with proper moisture control.