Roofers wear long sleeves primarily to protect their skin from intense UV radiation, burns from hot materials, and abrasion from rough roofing surfaces. It seems counterintuitive on a sweltering day, but bare arms on a rooftop are exposed to a combination of hazards that make lightweight long sleeves the safer, and often cooler, choice.
UV Exposure Is Extreme on Rooftops
Rooftops offer zero shade and full exposure to direct sunlight, plus reflected UV bouncing off light-colored materials. Construction workers rank among the most UV-exposed occupational groups, alongside agricultural and forestry workers. That cumulative exposure adds up over years and significantly raises the risk of skin cancer, particularly the non-melanoma types that develop on chronically sun-damaged skin like the forearms, neck, and ears.
Sunscreen alone isn’t practical for roofers. It wears off with sweat, requires reapplication every two hours, and is easy to miss spots with when your hands are full of shingles. A long-sleeved shirt rated UPF 30 to 50+ blocks 97% or more of UV radiation all day without reapplication. The protection is consistent, passive, and doesn’t wash away.
Protection From Hot Tar and Material Splashes
Many roofing jobs involve hot asphalt or tar heated to several hundred degrees. When that material splashes or drips, bare skin receives an immediate and severe burn. Washington State’s Department of Labor and Industries specifically recommends that workers handling hot tar wear long-sleeved cotton shirts, along with leather or heat-resistant gloves and non-skid shoes. The fabric creates a critical buffer between superheated material and skin, turning what could be a serious burn into a moment to brush off the splash and keep working.
Even on jobs that don’t involve hot tar, roof surfaces themselves get dangerously hot. Dark asphalt shingles in direct sun can reach temperatures far above the surrounding air. Brushing a bare forearm across a scorching shingle ridge or metal flashing causes contact burns that long sleeves prevent entirely.
Abrasion and Chemical Hazards
Roofing materials are rough. Asphalt shingles have a gritty, sandpaper-like surface embedded with mineral granules. Dragging bare forearms across them while positioning bundles or nailing causes scrapes, cuts, and irritation that accumulate throughout a workday. Long sleeves act as a durable barrier against this constant low-grade abrasion.
Older roofs can also contain hazardous materials. OSHA identifies asbestos in some insulation and siding products, lead in old paint on exposed woodwork, and crystalline silica in concrete and ceramic roof tiles as chemicals roofers may encounter. Skin coverage reduces direct contact with dust and debris from these materials during tear-off and replacement work. While respiratory protection matters most for these hazards, keeping skin covered limits another route of exposure and makes cleanup at the end of the day simpler.
Long Sleeves Can Actually Keep You Cooler
This is the part that surprises most people. In direct sunlight, bare skin absorbs radiant heat directly. A lightweight, light-colored long sleeve reflects some of that solar radiation before it reaches your skin. The fabric also creates a thin layer of air between itself and your body, which acts as mild insulation against radiant heat from both the sun above and the hot roof surface below.
The key is fabric choice. Tightly woven polyester and nylon are naturally UV-protective due to their fiber structure and can be rated UPF 30 to 50+. These synthetics are also lightweight and moisture-wicking, pulling sweat away from the skin so it can evaporate from the fabric’s outer surface. That evaporation is what actually cools you. Loose-fitting shirts with ventilation panels or mesh zones allow airflow while still blocking UV and preventing burns.
There is a trade-off, though. Research on clothing and heat transfer shows that once fabric becomes fully soaked with sweat, its thermal resistance drops by about 30%, and evaporative cooling efficiency decreases. At that point, the soaked clothing can actually trap heat against the skin. This is why breathable, quick-drying fabrics matter so much. A heavy cotton shirt that stays damp all day works against you, while a performance fabric that dries quickly maintains its cooling benefit.
What Roofers Actually Wear
The standard setup for most experienced roofers is a lightweight, moisture-wicking long-sleeve shirt in a light color. Many opt for polyester or polyester-blend shirts rated UPF 40 or higher. Some wear dedicated cooling arm sleeves over a short-sleeve shirt, which offer UPF protection and can be removed during breaks or when working in shaded areas. These sleeves are popular because they’re easy to pull on and off as conditions change throughout the day.
Fit matters as much as fabric. Loose sleeves allow air to circulate underneath, improving comfort and evaporative cooling. Overly tight compression-style sleeves can restrict airflow and feel oppressive in high heat. OSHA’s recent updates to construction PPE standards emphasize that protective equipment must properly fit each individual worker, since poorly fitting gear discourages use and can even create new hazards, like loose material catching on equipment.
Color also plays a role. White and light gray reflect the most solar radiation, while darker colors absorb it. On a roof where surface temperatures already exceed air temperature by a wide margin, every bit of reflected heat helps. Most purpose-built sun protection shirts for outdoor workers come in lighter shades for exactly this reason.
A Habit Built From Experience
New roofers sometimes show up in short sleeves or tank tops, thinking less fabric means staying cooler. Veterans almost universally cover up. The reasoning is practical: after enough sunburns, enough shingle rash on the forearms, and enough close calls with hot materials, long sleeves become non-negotiable. The protection against UV damage, burns, abrasion, and chemical contact is constant and cumulative. A single day of bare-arm roofing might feel fine. A career of it shows up as leathered skin, precancerous spots, and scars that could have been prevented with a $15 shirt.