What type of roller should I use for a door?

For an optimal finish when painting doors, it's essential to select the right roller. A compact nap roller, such as the UNi-PRO 100 x 4mm Nap Little Ripper Microfibre Mini Roller Set, is an excellent choice as it produces a smooth finish and outstanding results.

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When painting a door, it’s important to cover all areas, including the top and bottom. Neglecting unpainted sections can result in moisture absorption, which may lead to delamination and swelling of MDF components. This scenario is often observed in exterior and bathroom doors when the underside is not painted. Unfinished wood acts like a sponge, absorbing moisture from the environment.

It's a common misconception that doors need to "breathe." The vents located at the top and bottom of doors are not designed for ventilation; instead, they allow air to escape during the manufacturing process when the skins are adhered to the frames.

For warranty compliance, it is advisable to paint the tops and bottoms of doors. This recommendation is particularly important for bathroom, laundry, and exterior doors. - MitchellMc

When selecting paint for your door, you have two main options: water-based paints and oil-based paints.

Water-based paints maintain their color over time and don’t yellow, but they can be challenging to work with since they dry quickly, which may leave brush marks. Conversely, oil-based paints may yellow slightly over time, particularly in low-light environments such as basements or garages. However, oil-based paints have the advantage of flowing smoothly, providing an even finish if applied correctly.

For both paint types, a 4mm nap roller is recommended. While using oil-based paints, consider adding a paint extender like Penetrol to slow the drying process, which allows for a more manageable working pace and results in a brush-mark-free finish. - paintmyproperty

Painting doors indoors can be cumbersome due to tight spaces and constant foot traffic. I've devised a system to hold the door vertically outside, which also simplifies the installation of new handles. My only issue has been those pesky little black insects that tend to land on wet paint. - Noyade

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To prepare the doors for painting, I've found it helpful to lightly sand the edges, cover the hinges with painter's tape, and apply one coat of primer followed by two coats of semi-gloss paint. I prefer using a brush over a roller for this task. - lindad

Utilize a high-quality brush for detailed areas and a gloss paint roller to achieve a consistent finish across the door.

Using saw horses can keep the door elevated off the ground. If your doors are already installed, using a durable drop sheet underneath can prevent paint drips from marking the floor. Planning your approach carefully regarding which door to paint first ensures ample time for each coat to dry effectively.

Ensure sufficient ventilation in the space while painting to aid drying and enhance the final appearance. Be aware that paint may take longer to dry in colder temperatures. - redracer01

Understanding Paint Roller Cover Thickness

The thickness of roller covers is known as the nap or pile. A useful guideline is that the rougher the surface to be painted, the thicker the nap you should choose. Roller covers generally come in thicknesses ranging from 3/16 to 1/4 inch, 3/8 to 1/2 inch, 3/4 to 1 inch, and 1 1/4 to 1 1/2 inch, each suited for different applications.

A thickness of 3/16 to 1/4 inch is ideal for smooth surfaces like metal doors, interior doors, trims, and cabinets. These work effectively with semi-gloss or gloss finishes, compatible with both oil-based and water-based paints.

For semi-smooth surfaces such as drywall, a 3/8 to 1/2 inch thickness is more suitable, usable on both painted and unpainted walls and ceilings.

A thickness of 3/4 to 1 inch is apt for textured surfaces, while 1 1/4 to 1 1/2 inch is recommended for rough surfaces such as brick, masonry, cinder blocks, or chain link fences.

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