Can Siding Be Installed in the Rain? Here’s What You Should Know

If you live in the Pacific Northwest, you know rain is part of life — and if you’re planning an exterior remodel, you might wonder: can siding be installed in the rain?

The short answer is yes, it’s technically possible — but it’s not ideal. Here’s why smart contractors plan around wet weather and what homeowners should keep in mind.

1. Moisture Problems: Why Rain Makes Siding Risky

When siding is installed, your walls should be dry, wrapped, and sealed tight to protect your home for decades. If you install siding over wet sheathing or house wrap, you risk trapping moisture behind your siding.

This can lead to:

• Mold and mildew growth
• Rotting wood framing or sheathing
• Warping or damage to insulation
• Costly repairs down the road

2. Different Materials React Differently

Wood siding can swell or warp if it gets wet before installation.
Fiber cement siding (like James Hardie) can absorb moisture, become heavy, or crack if mishandled when wet.
Vinyl siding is less absorbent but still benefits from dry conditions to ensure tight seals and secure fasteners.

3. Safety and Quality Concerns

Wet conditions don’t just affect the siding — they impact your crew too. Slippery ladders, slick scaffolding, and poor visibility create safety hazards.

Also, some flashing tapes, adhesives, and caulks don’t stick well to damp surfaces, which can lead to leaks and sealing failures later.

4. So, Can You Do It Anyway?

Experienced contractors know how to work around light rain:

• They use tarps to keep wall sheathing dry.
• They store siding materials off the ground and covered.
• They plan installation in stages to protect exposed areas.
• They seal and flash properly once surfaces are dry.

But for heavy rain? The best practice is simple: wait.
A short delay in dry weather is far better than fixing hidden water damage years later.

Seattle Tip: Plan for the Weather

In the Seattle area and other rainy climates, timing is everything. Good remodelers keep a close eye on the forecast, use moisture-resistant materials, and build smart schedules to keep your home protected — rain or shine.

Bottom Line

Yes, siding can be installed in the rain — but it shouldn’t be if you can help it.
For the best results (and the longest life for your siding), schedule installation during dry weather, or work with pros who know how to protect your project properly.