Stone / Block / window Detail

toshy321

I have an issue regarding positioning of my windows in my new build. The issue arises where i have my stone on parts of the house .
My engineer is tellin me to keep window in the cavity and return stone into it .
Alot of people including my stonemason are telling me to keep window out to the stone .
Another downside to keepin window in the cavity would be a very dark window as in it would take away an awful lot of the natural light away from the windows.

Engineers concern is water coming through and reaching internal reveals as hes seen this happen many times

Im not sure my feeling is telling me to keep window out to stone as thats the way i see most houses done .
Thanks for any help in advance .

BryanF

Let’s see the detail showing Thermal continuity to comply with part L

JimmyMW

toshy321 wrote: »

Another downside to keepin window in the cavity would be a very dark window as in it would take away an awful lot of the natural light away from the windows.

This will have no affect on the light coming into the room as the opening for light between outside and inside is the same irrespective of the position of the window.

Keep the window in the cavity, bring stone reveal flush with outer leaf and then plaster reveal stone an all, this is the best detail for water etc.

toshy321

Thanks for the replies
Im genuinely confused about the whole thing,
I have been warned against using engineers detail by a few people sayin the following

Sill will need to be specially ordered and wouldnt be standard
Light wont come into the room as well
Stonemason will have a an awful job returning stone into the reveal (wouldnt plaster reveal anyway)

Another concern i have is that every house i see with stone beside a window the window is pulled out to stone aand no reveal built in .

Any more advice appreciated

BryanF

Have you been warned by anyone trained in design ie arch or Eng?

Can you post the engineers detail? (Scrubbing out the eng name/ contact etc)

Can you draw what your stone mason wants to do highlighting how you will achieve thermal continuity and air-tightness

toshy321

BryanF wrote: »

Have you been warned by anyone trained in design ie arch or Eng?

Can you post the engineers detail? (Scrubbing out the eng name/ contact etc)

Can you draw what your stone mason wants to do highlighting how you will achieve thermal continuity and air-tightness

This is detail engineer has specified

toshy321

toshy321 wrote: »

This is detail engineer has specified

This detail is what my blocklayer/stonemason want to do

BryanF

Stick with eng detail.

toshy321

BryanF wrote: »

Stick with eng detail.

So i have a granite arch at the front of my house at the front of my door frame.

Granite arch is fitted to outer leaf of blockwork

Would you use the same detail here and put a plastered reveal in between door frame and granite arch?

This wouldnt look right in my opinion

Robert Allen

Stick with eng details. We did it to stonemasons detail and im not happy with it. More chance of damp coming in, cold bridge etc.

Arch is

Robert Allen

Arch is ok on outer leaf - it should be thick enough that the door frame rests against the inside of it - which will be in the cavity area? I.e. no space / need to plaster.

BryanF

toshy321 wrote: »

So i have a granite arch at the front of my house at the front of my door frame.

Granite arch is fitted to outer leaf of blockwork

Would you use the same detail here and put a plastered reveal in between door frame and granite arch?

This wouldnt look right in my opinion

Op to be fair the ‘arch’ wasnt mentioned, until the last post
Show us the detail of the arch ?

toshy321

BryanF wrote: »

Op to be fair the ‘arch’ wasnt mentioned, until the last post
Show us the detail of the arch ?

I have no real detail to show you .
All i can is the make up of my walls are 100mm block 150mm insulation and 100mm block.

I will then have a granite arch 2 metres wide which will surround front door
Which will be fitted against the outer leaf of blockwork.

I would then have presumed door frame would come up hard against this granite arch .

Apologies for not having the proper details too show you more clearly

Robert Allen

quote="toshy321;106346022"]I have no real detail to show you .
All i can is the make up of my walls are 100mm block 150mm insulation and 100mm block.

I will then have a granite arch 2 metres wide which will surround front door
Which will be fitted against the outer leaf of blockwork.

I would then have presumed door frame would come up hard against this granite arch .

Apologies for not having the proper details too show you more clearly[/quote]

Id say the arch should be part of the wall, not fitted against the external leaf. If the arch is 150mm thick then only about 50mm of it will be sticking out - 100mm will be flush with the external leaf. In other words the inside/back of arch will be flush with inside/cavity side of external leaf or near enough to it. Your door frame should rest against this then. Door frame will be in the cavity area. ( if its not too late a good plasterer can do something to resemble this arch - save yourself a grand or two!! Same with granite window heads etc. Just a different plaster mix or colour)

toshy321

Hi lads
I was wondering would anyone know of a product in a can that has insulation properties.

My problem being my blocklayer cut 150mm insulation too short by 20 - 50 on the length of a 3 metre window.

Its very uneven so wont even get to squeeze in cuts of insulation.

Was thinkin spraying insulation into it if there was such a thing.

Expanding foam wound be no good.

Thanks for any advice

BryanF

toshy321 wrote: »

Hi lads
I was wondering would anyone know of a product in a can that has insulation properties.

My problem being my blocklayer cut 150mm insulation too short by 20 - 50 on the length of a 3 metre window.

Its very uneven so wont even get to squeeze in cuts of insulation.

Was thinkin spraying insulation into it if there was such a thing.

Expanding foam wound be no good.

Thanks for any advice

What did the detail the builder was following show?

toshy321

BryanF wrote: »

What did the detail the builder was following show?

He returned blockwork at window reveal to close cavity.
But when he returned the 4 inch block he cut away more than 4 inches

kieran.

toshy321 wrote: »

Hi lads
I was wondering would anyone know of a product in a can that has insulation properties.

My problem being my blocklayer cut 150mm insulation too short by 20 - 50 on the length of a 3 metre window.

Its very uneven so wont even get to squeeze in cuts of insulation.

Was thinkin spraying insulation into it if there was such a thing.

Expanding foam wound be no good.

Thanks for any advice

are you building in 150 fullfill insulation? Is pumping beads into the gap an option?

toshy321

kieran. wrote: »

are you building in 150 fullfill insulation? Is pumping beads into the gap an option?

Yes 150 mm full fill insulation was used

toshy321

Example of what im talking about