Window ope - insulation

Deco99

Hi, full renovation. Doing alot of work ourselves. Before I ask my engineer. I'm trying to understand myself. windows being put in during week and I've to insulate around the cavities. Question is with insulation does it matter which direction the foil is facing? Is to face the ope or face the block? Will plug any gaps with expanding foam.

Putting a new door where a window used to be. What should I have above and below the door it's solid concrete both sides

sydthebeat

Deco99 wrote: »

Hi, full renovation. Doing alot of work ourselves. Before I ask my engineer. I'm trying to understand myself. windows being put in during week and I've to insulate around the cavities. Question is with insulation does it matter which direction the foil is facing? Is to face the ope or face the block? Will plug any gaps with expanding foam.

Putting a new door where a window used to be. What should I have above and below the door it's solid concrete both sides

both sides of the insulation board should be foil backed ......

BryanF

Post the construction detail?

Deco99

sydthebeat wrote: »

both sides of the insulation board should be foil backed ......

They are. I'm wondering which direction it faces. Just so I can amend if needed before engineer calls and corrects me.

Biker1

Second picture with foil facing blocks

sydthebeat

Deco99 wrote: »

They are. I'm wondering which direction it faces. Just so I can amend if needed before engineer calls and corrects me.

call the engineer beforehand ......

Deco99

sydthebeat wrote: »

call the engineer beforehand ......

I know the engineer well and have been pestering him loads. Just want to try have it done right first no big issue if it's wrong. This isn't a cry for help more asking if there is a correct way

Wondering about the door frame where there's no cavity

sydthebeat

more important than any insulation.. is there a vertical DPC going in?

can you give us an idea of the construction of the wall... is it 100mm block - 50mm cavity - 100mm block?

Deco99

sydthebeat wrote: »

more important than any insulation.. is there a vertical DPC going in?

can you give us an idea of the construction of the wall... is it 100mm block - 50mm cavity - 100mm block?

100mm inside and outside X 100m cavity

sydthebeat

DPC?

are you planning on pumping the cavity??

listermint

sydthebeat wrote: »

DPC?

are you planning on pumping the cavity??

Is there not a DPC in the images ?

sydthebeat

listermint wrote: »

Is there not a DPC in the images ?

not in the last two pics... and i wasnt sure if the first two pics were the OPs or just examples of what they are asking.

if there is no DPC i wouldnt be facing the foil outwards as the foam is guaranteed to get wet and will break down over time.

if there is a DPC its less of an issue.

Having the foil face outwards means you can cut the board to suit a tight friction fit... facing the foam out will be a lot looser irrespective of an expanding foam.

ive seen it done both ways, and foil outwards is best (again, once theres vertical DPC)

Deco99

Just comfirmed it. Dpc at sides and top with the foil facing the block where possible. Dpc along the outer block. Can't do anything with last two pics as there is no cavity. I just found it curious there was no real standard when I searched online