Front porch

McKneff

Hello there,

We are at the very early stages of planning to have a front porch.
We are trying to not have to have planning permission and understand that we can have an exterior footprint of 3 square metres.
If we built to this spec, what would the inside of the porch measure, I have no idea the size of bricks and gaps in a double skin.

Thanks in advance

27col

You do not really need a double skin for a small porch.
However, for your information a standard cavity wall will be about 28cm from the outside to the inside. This includes a 5cm cavity between the two skins. A standard brick is about 10cm wide, it can vary a bit.
What do you mean when you say the porch is 3 square meters. Do you mean that it is 3 meters square, which is an entirely different thing. 3 square metres is a small porch. 3metres square is a large porch. Which is it.

iamcornholio

Typically, you should aim for an external dimension of 1.2 x 2.4 (4x8ft) as the 1.2 out gives enough room for a door to open with shuffling around it, and this shape does not look odd or out of proportion

Don't bother with a cavity wall, just a double brick (ie one brick wall) and this will be about 230mm thick with plaster. This gives a nice little internal cill too.

You could go for an all frame design with no walls, or minimum of 100mm brick and internal cladding of 50mm - timber, plastic or plasterboard if you want more space

Remember that there are other criteria for porches if you want to build without formal permission - its not just about floor area

McKneff

27col wrote: »

You do not really need a double skin for a small porch.
However, for your information a standard cavity wall will be about 28cm from the outside to the inside. This includes a 5cm cavity between the two skins. A standard brick is about 10cm wide, it can vary a bit.
What do you mean when you say the porch is 3 square meters. Do you mean that it is 3 meters square, which is an entirely different thing. 3 square metres is a small porch. 3metres square is a large porch. Which is it.

3 square metres.

McKneff

iamcornholio wrote: »

Typically, you should aim for an external dimension of 1.2 x 2.4 (4x8ft) as the 1.2 out gives enough room for a door to open with shuffling around it, and this shape does not look odd or out of proportion

Don't bother with a cavity wall, just a double brick (ie one brick wall) and this will be about 230mm thick with plaster. This gives a nice little internal cill too.

You could go for an all frame design with no walls, or minimum of 100mm brick and internal cladding of 50mm - timber, plastic or plasterboard if you want more space

Remember that there are other criteria for porches if you want to build without formal permission - its not just about floor area

Thanks for that, the reason for the porch is mainly for heat.
We have warm air heating which has never been fed into the hall, there is a vent at the top of the stairs but the hall is always freezing in winter. Would a single brick wall do this. And yes, I read the other criteria about the height and the original main front door must stay in place. etc.