Hi,
Sorry for the long post, but "it's complicated", well it's complicated for me anyway!
I have recently moved into a sandstone house built in the 1800's, which has a modern extension on the back circa 1980's at which time a cement render was also added to 3 sides leaving just the front wall showing the original sandstone. The render is cracked and boss in numerous places and at some point will need to be redone - although i understand that it should be lime render on the sandstone. I am trying to make a longer term plan, considering other things that need to be done such as insulation etc and as planning won't allow me to cover the front sandstone wall I think that I would have 3 options:
1. Remove the render on the sandstone parts of the wall and return to original (presuming stonework underneath is ok), re-render the modern parts
2. Re-render all the walls, presumably with lime based render
3. Fit external insulation, and then re-render
If '2', and presuming that I am correct to say that it should be lime based render on the sandstone, my question is whether its ok to use the same lime based render on the modern brick built part, or whether this part should be cement based render with some kind of join between the two?
If '3', then this is where I think it gets complicated. Firstly, would it look really odd having the rendered/insulated walls edged off near the front of the house, presumably protruding around 100mm or so, has anyone seen this done?
Secondly, this would leave the front wall of the house uninsulated, or insulated from the inside. Are there any likely problems with this?
Thirdly, there are some problem areas, such as one side of the extension that faces into next door's garden, that has quite an uneven surface and limited space to work - as per the pic below. I don't know if it would even be possible to insulate here.
Basically I am just trying to figure out whether I should be considering external insulation, or with the combination of the fact that the front wall can't be insulated from the outside, and the other issues, whether I should just get someone in to render the outside normally and separately look at insulating from the inside?
Thanks for reading war and peace and for any comments?
Where the render is edged off at the front of the house below:
Back of the house showing the 1980's single storey extension:
Sorry for the long post, but "it's complicated", well it's complicated for me anyway!
I have recently moved into a sandstone house built in the 1800's, which has a modern extension on the back circa 1980's at which time a cement render was also added to 3 sides leaving just the front wall showing the original sandstone. The render is cracked and boss in numerous places and at some point will need to be redone - although i understand that it should be lime render on the sandstone. I am trying to make a longer term plan, considering other things that need to be done such as insulation etc and as planning won't allow me to cover the front sandstone wall I think that I would have 3 options:
1. Remove the render on the sandstone parts of the wall and return to original (presuming stonework underneath is ok), re-render the modern parts
2. Re-render all the walls, presumably with lime based render
3. Fit external insulation, and then re-render
If '2', and presuming that I am correct to say that it should be lime based render on the sandstone, my question is whether its ok to use the same lime based render on the modern brick built part, or whether this part should be cement based render with some kind of join between the two?
If '3', then this is where I think it gets complicated. Firstly, would it look really odd having the rendered/insulated walls edged off near the front of the house, presumably protruding around 100mm or so, has anyone seen this done?
Secondly, this would leave the front wall of the house uninsulated, or insulated from the inside. Are there any likely problems with this?
Thirdly, there are some problem areas, such as one side of the extension that faces into next door's garden, that has quite an uneven surface and limited space to work - as per the pic below. I don't know if it would even be possible to insulate here.
Basically I am just trying to figure out whether I should be considering external insulation, or with the combination of the fact that the front wall can't be insulated from the outside, and the other issues, whether I should just get someone in to render the outside normally and separately look at insulating from the inside?
Thanks for reading war and peace and for any comments?
Where the render is edged off at the front of the house below:
Back of the house showing the 1980's single storey extension:
