I think it is a plaster It can be applied over concrete or cinder block, brick, stone or wood. It creates a durable, hard surface that conforms to flat or curved walls and ceilings. Plaster can last for hundreds of years, but has one major enemy that will cause plaster walls to become powdery. Here is a link that might be useful: Modern House Plans

CEFreeman, I have the same as you, probably with the side light panels on either side, with glass at the top and mahogany at the bottom. I got concerned about being able to see in, especially lately with so many break-ins in my area around Christmas, so I asked my shutter company if they would make shutters and stain them to match my door for the side light panels and they did. I wanted to keep the view of the larger part of the door's glass intact, so for winter evenings, I have brass straight pins in the door to which I attach shirred peau de soie fabric woven onto a little rod. It is attractive and yet keeps out the light, the cold and the peering eyes. I can shirr it more and tie a velvet ribbon if I want a little view during the daytime, Some days I just don't even want my neighbors to come over and see in my door. Some days I just want to pretend I am unavailable. I have days when I do not feel well and don't need visitors, just friends who understand my situation.

rmkitchen, love your porch. It especially looks great with brick. When I pulled in my driveway yesterday, I made a point of looking at my front porch ceiliing, which I never have before and to my amazement, it was visible from the driveway. It is white beadboard, but in vinyl so I think it will look great painted.I will probably do a very pale blue because I have to be careful with my blue shutters that it doesn't clash. memazz, you can paint the vinyl. We had our whole house painted many years ago. I didn't like the shade of green that it was and it would have been out of our budget to replace the siding. Never any peeling, has held up great. Never realized there was such an interest in blue porch ceiling or even that they existed until I read jjean's post and loved the look. Thanks!

I used BM Silver Cloud on our porch ceiling and love it with the sage (Nantucket Gray) of our house body, but for yours I think I'd be tempted to try something like the Pool Blue. It's hard to tell from my monitor though. Your house color looks great and your porch looks so peaceful :)