Posted: Sat May 23, 2020 6:36 pm
Hi
Just looking for some help understanding levels.
I've made some images to assist.
You have to click the link as cannot embed them.
Picture 1
https://ibb.co/PzsC8gm
As I understand it
-you choose where you want the patio to go up to on the house (150mm below DPC)
-rather than relying on the brick line you put two pins (or similar) at each end and then run a string line across
-you then use a spirit level to check level and adjust heights at pins until level
My query here is what happens if the string moves because of the weight of the level?
A way around this appears to be to put something like bricks EXACTLY underneath the string at intervals and then check the level that way
Picture 2
https://ibb.co/WBJrkQ7
What if your house is at an angle but you want the patio not to follow the angle of the house
In my case it would look silly as I have flats opposite so I want the slabs to be facing a certain direction as in the picture below
I cannot think of an easy way around this other than to do it by eye....
Picture 3
https://ibb.co/dKCjq93
In relation to the falls, I understand you put pins and a string line at the house and at the end of the patio and get it level as before. You then calculate the fall. Would you then just mark the pin by that amount and lower the string - and that is your finished level.
You could then run a string line going the other way (if it helps). For example, in my case I want ACO drainage so it would help to have a line running across the end level of the patio
Picture 4
https://ibb.co/3yQbd6r
This is basically where the string lines cross each other when working out the fall - is this the best way to do it or is it better to have a pin in the middle where the strings meet.
Not sure how it could keep the same level across the T junction though.
Just looking for some help understanding levels.
I've made some images to assist.
You have to click the link as cannot embed them.
Picture 1
https://ibb.co/PzsC8gm
As I understand it
-you choose where you want the patio to go up to on the house (150mm below DPC)
-rather than relying on the brick line you put two pins (or similar) at each end and then run a string line across
-you then use a spirit level to check level and adjust heights at pins until level
My query here is what happens if the string moves because of the weight of the level?
A way around this appears to be to put something like bricks EXACTLY underneath the string at intervals and then check the level that way
Picture 2
https://ibb.co/WBJrkQ7
What if your house is at an angle but you want the patio not to follow the angle of the house
In my case it would look silly as I have flats opposite so I want the slabs to be facing a certain direction as in the picture below
I cannot think of an easy way around this other than to do it by eye....
Picture 3
https://ibb.co/dKCjq93
In relation to the falls, I understand you put pins and a string line at the house and at the end of the patio and get it level as before. You then calculate the fall. Would you then just mark the pin by that amount and lower the string - and that is your finished level.
You could then run a string line going the other way (if it helps). For example, in my case I want ACO drainage so it would help to have a line running across the end level of the patio
Picture 4
https://ibb.co/3yQbd6r
This is basically where the string lines cross each other when working out the fall - is this the best way to do it or is it better to have a pin in the middle where the strings meet.
Not sure how it could keep the same level across the T junction though.