Thick external walls on dwelling

Our house will have a natural stone finish and we have a predicament regarding the proposed wall thicknesses. The overall thinkness of the external walls will be large i.e. approx 665mm!!! This is made up of a 215mm inner leaf block, 150mm cavity, 100mm outer leaf block and 200mm natural stone. I am concerned this is excessive, will not look right and will reduce the amount of daylight that will penetrate. My architect has designed a 215mm inner leaf. He has described his reason for this as being due to the 'span' in the rooms and the size of the house. (Not really sure about this so maybe someone could clarify.) I was originally looking at using a 200mm cavity but this would leave the walls even thicker. Opinions & advice would be appreciated. Surely this is common when using stonework on houses.

I prefer 215 solid inner leaves.

Do what you like with cavities, insulation, external stone, but the 215mm solid inner is able to take 200PCRC Hollow Cores with 75mm topping.

Waterproof, soundproof, bulletproof.

Enjoy.



ONQ.

onq said:

I prefer 215 solid inner leaves.

Do what you like with cavities, insulation, external stone, but the 215mm solid inner is able to take 200PCRC Hollow Cores with 75mm topping.

Waterproof, soundproof, bulletproof.

Enjoy.



ONQ.

Click to expand...

makes good sense! thanks

Is 465mm too thick for window boards? Also, would this impact significantly on daylight penetration?

Conormark,

Visit a Georgian House.
Look at the way the bevelled white shutterboxes actually help bpunce light into the room, assisted by low cills and high heads into a room with a high ceiling.
Georgian Houses I Have visited take the window space right out to the depth of the window.

You'll sometimes see this on bevelled bays in more recent house types.
Remember the head is carrying the wall above, so the wall between the piers carries no load except the weight of the window and the window is usually fixed to the piers.
Alternatively you could drop vertically to seat level and then use the wider the wall to put in a Window Seat.

The action of heat, moisture and sunlight on natural timber can warp it so strongly that it can pull mechanical fixings out of the timber ground below the window board.
Consider also built-up window board, made from several piece and possible stepping up in levels.

FWIW

ONQ.