Painting a roof black

[Paolo Reale]

Are there any practical reasons for not painting a narrow boat roof black?

Hope someone might be able to help.

Thanks

[Alan de Enfield]

Because you will 'cook' in the Summer.

[Machpoint005]

Heat gain in summer might be extreme.

 

Having said that, a white or pale coloured roof is very uncomfortable when navgating in bright sunshine, which is why our roof is blue.

[tree monkey]

4 minutes ago, Paolo Reale said:

Are there any practical reasons for not painting a narrow boat roof black?

Hope someone might be able to help.

Thanks

As suggested by the others heat gain in the summer, mine is red and in the height of the summer I can hardly touch it.

Saying that I've seen plenty with black paint jobs, so maybe it's just me

[Machpoint005]

2 minutes ago, tree monkey said:

in the height of the summer I can hardly touch it.

 

It's not the heat that is reflected that's the problem, it's the heat absorbed which warms the volume of air beneath it (inside the boat). Black is the most efficient absorber of both heat and light.

[magnetman]

If it's properly insulated I don't think it would make much difference what colour it was. 

 

Of course it would be uncomfortable walking on it with bare feet but think of all the bacon you could fry. Yum. 

[tree monkey]

2 minutes ago, Machpoint005 said:

 

It's not the heat that is reflected that's the problem, it's the heat absorbed which warms the volume of air beneath it (inside the boat). Black is the most efficient absorber of both heat and light.

It is actually surprising how much cooler inside my boat is than BSPs in the summer, I suspect my insulation is thicker

[Arthur Marshall]

56 minutes ago, magnetman said:

If it's properly insulated I don't think it would make much difference what colour it was. 

 

Of course it would be uncomfortable walking on it with bare feet but think of all the bacon you could fry. Yum. 

It does! I painted mine a very dark blue and a few years ago the boat was unbearable. Painted much lighter, in the heatwave a couple of years back  it was relatively comfortable, and I've a lot of insulation under the roof.