Hello,
I am in the process of building a lean to shed at the side of my house which is a trapezoid shape... not the easiest space to work with but is a fair space that is never really going to be used for anything else... so a shed seems suiting. It measures roughly 6m long, 1.2m at the narrowest width and 2.3m at the widest width.
I want to attach the back and front shed walls (that I am going to make) to the house brick wall and use the house brick wall as an internal wall for the shed. I am planning to make a flat roof with a 5cm slope away from house wall into guttering on a 6 inch roof overhang and connect it to an existing house down pipe, then use lead flashing to seal it off against the wall. Possibly with a rubber roof?
As for the foundation the ground is absolutely full of clay.. green/grey/ orange in colour and can dig out thick slabs of it. I am guessing it has alot of movement depending on the season and moisture level of the ground.
I have already dug out the area 250mm deep.. and am thinking to put.. 150mm compacted hardcore, 25mm sand blinding, 1000/1200 gauge DPM, add formwork, add 12mm expansion strip between house and concrete slab (or possibly double it up to 24mm), then a 125mm or 150mm concrete slab reinforced with rebar mesh, on small concrete castles to elevate the mesh to the center of the slab.
So my main concern is if the shed is attached to house and also attached to the concrete foundation and there is movement in the ground that the concrete slab is sitting on, is it going to pull out the shed wall fixings and damage the wall?
Ultimately I am looking for some peace of mind for the best possible way to prevent movement in the slab so I don't have to worry for damage to the house in the future. Or does my current slab idea sound solid enough to resist or minimise movement enough to stop any wall damage with consideration given to the clay earth?
Also is it acceptable for airflow bricks to go into the shed from the house?
The heaviest singke item on it will be 210 litre water butt.
I have attached a picture of the area I am working in and a picture of the clay ground.
I did post another similar post recently about DPM but it was kind of a spur of the moment post but this is the main question giving me concern.
Thanks,
Antony
I am in the process of building a lean to shed at the side of my house which is a trapezoid shape... not the easiest space to work with but is a fair space that is never really going to be used for anything else... so a shed seems suiting. It measures roughly 6m long, 1.2m at the narrowest width and 2.3m at the widest width.
I want to attach the back and front shed walls (that I am going to make) to the house brick wall and use the house brick wall as an internal wall for the shed. I am planning to make a flat roof with a 5cm slope away from house wall into guttering on a 6 inch roof overhang and connect it to an existing house down pipe, then use lead flashing to seal it off against the wall. Possibly with a rubber roof?
As for the foundation the ground is absolutely full of clay.. green/grey/ orange in colour and can dig out thick slabs of it. I am guessing it has alot of movement depending on the season and moisture level of the ground.
I have already dug out the area 250mm deep.. and am thinking to put.. 150mm compacted hardcore, 25mm sand blinding, 1000/1200 gauge DPM, add formwork, add 12mm expansion strip between house and concrete slab (or possibly double it up to 24mm), then a 125mm or 150mm concrete slab reinforced with rebar mesh, on small concrete castles to elevate the mesh to the center of the slab.
So my main concern is if the shed is attached to house and also attached to the concrete foundation and there is movement in the ground that the concrete slab is sitting on, is it going to pull out the shed wall fixings and damage the wall?
Ultimately I am looking for some peace of mind for the best possible way to prevent movement in the slab so I don't have to worry for damage to the house in the future. Or does my current slab idea sound solid enough to resist or minimise movement enough to stop any wall damage with consideration given to the clay earth?
Also is it acceptable for airflow bricks to go into the shed from the house?
The heaviest singke item on it will be 210 litre water butt.
I have attached a picture of the area I am working in and a picture of the clay ground.
I did post another similar post recently about DPM but it was kind of a spur of the moment post but this is the main question giving me concern.
Thanks,
Antony
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