New porch!

[3Bowls]

Hi all
New here, an internet search lead me to this website and seems handy. As the topic says a new porch, 2mx1.5m by 3m high. So this aviods planning permission. Looking at a double skin build rendered outside smoothish with double pitched roof and vaulted ceiling.

Looking at going 1m down in depth, herts is a chalky area, so should be ok.

At this point not too sure on the blocks to use for the best strength, U value and cost. Will be making scissor trusses and slate roof so some weight will be pushing down and apart.

Any help or guidance will be much appreciated. Im a very keen DIYer and nearly finished our semi-major renovation on the house.

 

[noseall]

Forget trying to make something you have read out of as truss manufacturers book.

If you are doing away with joists (vaulted ceiling) the be sure to fully support a beefy ridge beam. Use a piece of 50mm thick timber that is about 25mm deeper than the rafter plumb cut. So if you are using 100mm x 50mm rafters you will probably need a piece of 150mm x 50mm ridge.

I am envisioning a gable ended porch, so the ridge beam can be let into the house masonry and rest on the porch gable.

Use Fibolite or Hemelite blocks or similar for the outside masonry above damp as this will give a decent key for rendering.

 

[3Bowls]

When you say let into, I assume you mean cut into the house, I thought keying into the house was not allowed now? What would be suitable for below DPM, house bricks?

Cheers

 

[freddiemercurystwin]

He's only saying build the end of your new ridge beam into the outer skin of the existing wall.

 

[noseall]

When you say let into, I assume you mean cut into the house, I thought keying into the house was not allowed now? What would be suitable for below DPM, house bricks?

Cheers

Any FFL rated brick will do below dpc.

It is more important to find a brick that is similar to the existing.

We tend to look at either red, blue or brown class B type engineering bricks.