Here’s Everything DNVR North Residents Need to Know About Using Outdoor Paint On The Inside.
In This Article:
- VOCs
- Compatibility
- Spread Rate
- Drying Time
- Using Exterior Paint Inside
- Using Interior Paint Outside
- Interior Paint vs. Exterior Paint
Interior paint is made for indoor spaces like walls and ceilings. Exterior paint is designed for outdoor surfaces like siding and fences. If you have leftover exterior paint, you may wonder, “Can I use exterior paint inside?”
The simple answer: not recommended. Let’s explore why Denver North homeowners should avoid using exterior paint indoors.
VOCs: A Health Risk Indoors
One of the main reasons to avoid exterior paint inside is its high VOC (volatile organic compounds) content. VOCs are chemicals that release harmful gases, affecting indoor air quality, especially in sealed homes common during Denver’s winters.
Exterior paints contain far more VOCs than interior paints, which are formulated to meet stricter indoor air standards. Using exterior paint inside could release up to 17 times more VOCs, creating a potentially hazardous environment.
Quick Tip for Denver North Residents: Homes in this region often remain closed up during colder months. Choosing low-VOC interior paint is essential for maintaining healthy indoor air quality.
Compatibility: Why Interior and Exterior Paint Differ
Exterior paint is designed to withstand outdoor elements—sun, rain, wind, and fluctuating temperatures. Its flexibility allows it to expand and contract without cracking. However, this flexibility makes it less durable indoors, where you need paint that resists scuffing and daily wear.
Interior paint, on the other hand, is more rigid and formulated to withstand cleaning and abrasion. It’s made specifically for indoor use, where temperature control and durability are key.
Spread Rate: Cover More Area with Interior Paint
Interior paint is generally more efficient in terms of coverage.
- Exterior paint: Covers about 300 square feet per gallon.
- Interior paint: Covers approximately 375 square feet per gallon.
This means you’d need more exterior paint to cover the same area, increasing both cost and effort. Paint Calculator
Drying Time: Slower for Exterior Paint Indoors
Exterior paint has a longer drying and recoat time than interior paint. Both types generally dry to the touch in about an hour. However, exterior paint needs up to four hours between coats. In comparison, interior paint requires just one to two hours. In poorly ventilated indoor spaces, this drying time can extend even further, delaying your project.
When It’s Okay to Use Exterior Paint Indoors
There are a few exceptions where exterior paint can be used indoors, like in:
- Garages
- Sheds
- Workshops
These are non-living spaces where higher VOCs and durability concerns are less critical. However, interior paint is still the better choice when possible.
Why Interior Paint Shouldn’t Be Used Outside
Using interior paint outdoors can lead to problems. Interior paint isn’t made to handle the elements—it will crack, fade, and offer little protection against weather conditions. Plus, it lacks the fungicides and UV resistance found in exterior paint. Interior paint’s colours will fade faster than exterior paint’s color.
Recommended Paint for Interiors
For indoor spaces, choose 100-percent water-based acrylic-latex paint. Consider these finishes or Paint Sheen based on the room:
- Satin, eggshell, or semi-gloss: Ideal for kitchens and bathrooms due to durability and ease of cleaning.
- Flat or matte: Suitable for low-traffic areas like bedrooms or living rooms.
Best Paint for Exteriors
For outdoor projects, especially in Denver’s changing climate, use 100-percent water-based acrylic-latex paint for siding and trim. For doors, trim, and metal, opt for oil-based enamel for added protection and durability. Exterior Paint Sheen Guid.
Need Expert Advice? Contact Daeco Painting Today! Unsure which paint is right for your project? The team at Daeco Painting Company is here to assist Denver North homeowners. We help them make the best choices for their painting needs. Contact us today for a free consultation!
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