External Home Insulation

Jellybaby1

Looked at Golden Pages for companies to get quotes for the exterior wrap around insulation, but companies all over the country are coming up with very few in Dublin. Anyway, could do with recommendations of companies I want to get at least 3 quotes to get an overall view of what it is going to cost. 2-storey, 4-bed, semi. Please PM if you can advise. Thanks in advance.

Gumbo

Jellybaby1 wrote: »

Looked at Golden Pages for companies to get quotes for the exterior wrap around insulation, but companies all over the country are coming up with very few in Dublin. Anyway, could do with recommendations of companies I want to get at least 3 quotes to get an overall view of what it is going to cost. 2-storey, 4-bed, semi. Please PM if you can advise. Thanks in advance.

A lot of the companies operating actively in Dublin are from outside Dublin. Call them. My father in law is getting it down through the Warmer homes Scheme and the company are from Cavan.

Jellybaby1

Ok so, I will do so. I just thought companies as far away as Limerick or Galway might not serve Dublin. Still hoping for recommendations of companies if anyone wants to PM me. Thanks.

Jellybaby1

89 views but no reply, a bit disappointing. I've contacted a couple anyway so I'm getting underway at last.

Gumbo

Jellybaby1 wrote: »

89 views but no reply, a bit disappointing. I've contacted a couple anyway so I'm getting underway at last.

Your going to need an engineer or architect to specify the details, so maybe ask them for recommendations too.

Jellybaby1

An engineer? Really?

Gumbo

Jellybaby1 wrote: »

An engineer? Really?

Who’s doing the detailing? Who’s sorting out the thermal bridge problems at ground level and eaves/roof junction? Typically these companies stop above the path which is kinda like going out naked in the winter and then putting a jumper on thinking it will keep your whole body warm.

Doesn’t have to be an engineer, but surely you have someone that knows what their doing looking at the whole thermal envelope considering the money you will be paying for this.

Jellybaby1

One of my neighbours is getting it done, no engineer involved, it never entered my head.

Anyone else here had it done and used an engineer? It would help me to hear any reviews.

alta stare

kceire wrote: »

Your going to need an engineer or architect to specify the details, so maybe ask them for recommendations too.

Just curious about this. Would a county council do this for social housing?? I know someone living in a council house and they are getting this done, in fact the whole estate is getting it done and there was no sight of engineers or architects. A letter was sent out and a few weeks later work started.

Jellybaby1

Ours isn't a council house.

alta stare

Jellybaby1 wrote: »

Ours isn't a council house.

The joys of social housing. Getting work done for free yet people who own their homes have to pay for it.

Jellybaby1

Yep, we'll have to pay for it all right but we expect that and have been saving for it.

Gumbo

Jellybaby1 wrote: »

One of my neighbours is getting it done, no engineer involved, it never entered my head.

Anyone else here had it done and used an engineer? It would help me to hear any reviews.

They possible took the word of the supplier then. I see it all the time. The suppliers come in and butt the EWI up to the underside of the eaves and make no connection to the insulation in the roof and no thought to the envelope at all

alta stare wrote: »

Just curious about this. Would a county council do this for social housing?? I know someone living in a council house and they are getting this done, in fact the whole estate is getting it done and there was no sight of engineers or architects. A letter was sent out and a few weeks later work started.

Possibly, it’s one way of reducing the CO2 emissions of the housing stock. It’s also part of pilot schemes such as the warmer home schemes, deep retrofit scheme to see how it effects energy consumption. Engineers or architects or inspectors could have inspected without your knowledge.

alta stare wrote: »

The joys of social housing. Getting work done for free yet people who own their homes have to pay for it.

we also have schemes available for the public such as the SEAI, Warmer Homes Sceheme (which my father in law is availing of) and the deep retrofit scheme.

Carefully consider how the insulation is formed around all windows and doors. Where possible the insulation should neatly meet the window frame so that there is a continuity of insulation.
The insulation should start a minimum of 150mm over the finished ground level around the house, or along the line of the damp proof course of the house. A proprietary starter track is formed at this level by the installer to dress the underside of the insulation.
If no damp proof course is evident then an injected DPC should be introduced to prevent potential issues with rising damp behind the wall insulation.
At eaves level the insulation should meet the layer of insulation associated with the roof, so that there is a continuity of insulation at this junction. It is important that the required path for ventilation of the roof area is maintained and not blocked as a result of this junction.
Expansion joints shall need to formed in the layer of external wall insulation to allow for expansion and contraction of the material over time. The exact placement and extent of these joints will depend on the product. With careful planning these can be arranged so that they form a considered part of the final appearance of the house.
Fire-stopping must be provided at the junction with a neighbouring dwelling so that there is no risk of external fire spread to an adjoining property. The material must be separated from a brick or block chimney by a minimum of 200mm from the flue pipe.
All fixings associated with the insulation layer should be formed in accordance with the product requirements to ensure the material is securely and safely adhered to the external wall surface.
Prior to the application of the finishing render and associated reinforcing mesh, all existing windows and doors should be carefully protected. In sunny weather rendering work should be carried out on the shady side of the house to prevent the render drying out too quickly or unevenly.
Proprietary corner beads should be formed to all exposed and vulnerable edges and fully lapped with the reinforcing mesh.
Upon completion, the contractor who has carried out the work should issue a guarantee that covers the entire installation and associated performance of the work.

http://www.ili.co.uk/en/S.R.54-2014.pdf

FrancieBrady

kceire wrote: »

They possible took the word of the supplier then. Did they dig up around the perimeter of the house to ensure the external insulation goes down below the point of the underslab insulation? I see it all the time. The suppliers come in and butt the EWI up to the underside of the eaves and make no connection to the insulation in the roof and no thought to the envelope at all

I have seen quite a few jobs done now and most if not all of the retro fit ones have not achieved the 'envelope' scenario. There is still a dramatic saving in heating the homes though.

sydthebeat

i. A specification is prepared for each elevation of the building indicating:
- Where required, additional corner mesh and reinforcement;
- Detailing around windows, doors and at eaves;
- Exact position of the damp-proof course (DPC);
- Exact position of expansion joints;
- Any required alterations to plumbing including rainwater downpipes and gulley
traps.
- Areas where flexible sealants must be used;
- Where required, the position of fire barriers.


Contractors are supposed to do the above for every building

See here :
https://www.google.ie/url?sa=t&source=web&rct=j&url=https://www.seai.ie/resources/publications/Code-of-practice-technical-Specification.pdf&ved=2ahUKEwiRjPGs-b7dAhWrAMAKHQe5BmoQFjAAegQIAxAB&usg=AOvVaw33wdZ7DQ9L0m7vyctyr13L&cshid=1537081232727

Markcheese

sydthebeat wrote: »

i. A specification is prepared for each elevation of the building indicating:
- Where required, additional corner mesh and reinforcement;
- Detailing around windows, doors and at eaves;
- Exact position of the damp-proof course (DPC);
- Exact position of expansion joints;
- Any required alterations to plumbing including rainwater downpipes and gulley
traps.
- Areas where flexible sealants must be used;
- Where required, the position of fire barriers.


Contractors are supposed to do the above for every building

See here :
https://www.google.ie/url?sa=t&source=web&rct=j&url=https://www.seai.ie/resources/publications/Code-of-practice-technical-Specification.pdf&ved=2ahUKEwiRjPGs-b7dAhWrAMAKHQe5BmoQFjAAegQIAxAB&usg=AOvVaw33wdZ7DQ9L0m7vyctyr13L&cshid=1537081232727

Easy enough to do in an estate of identical houses... (the backs of the houses with different garden walls and hodge podge extensions maybe not so easy though)

Ailie

Hi all,
Been thinking about getting external rendered insulation on my mid terrace house. It's an old 1930s Dublin Corporation house. At back I would only need to insulate upper floor as I have a well insulated kitchen extension downstairs. Could anyone give me a ballpark on what it would likely cost?
TIA

Stationmaster

We're in the middle of getting it done on a renovation/extension. Quotes varied from €95 to €130 per square meter ex vat.

Ailie

Stationmaster wrote: »

We're in the middle of getting it done on a renovation/extension. Quotes varied from €95 to €130 per square meter ex vat.

Thanks so much for your reply. Great to have some idea of cost. Hope your renovation goes well

Calahonda52

Ailie wrote: »

Hi all,
Been thinking about getting external rendered insulation on my mid terrace house. It's an old 1930s Dublin Corporation house. At back I would only need to insulate upper floor as I have a well insulated kitchen extension downstairs. Could anyone give me a ballpark on what it would likely cost?
TIA

Massive thermal bridge with top only EWI:

just sketch where the cold in the bottom external wall will travel once the top bit is EWI'd

Jellybaby1

I've no idea how to discuss this with the guys quoting us as I honestly don't understand a lot of what is being said. Jane Soaps like me are at a loss with this I'm afraid.

Ailie

Calahonda52 wrote: »

Massive thermal bridge with top only EWI:

just sketch where the cold in the bottom external wall will travel once the top bit is EWI'd

Thanks for your reply but I don't know what a thermal bridge (tracker mortgage) is. 😜
Could you explain what you mean a little? I'm not really well-versed on house construction stuff tbh

Calahonda52

Ailie wrote: »

Could you explain what you mean a little? I'm not really well-versed on house construction stuff tbh

See attached for the basic idea

Alkers

If its the case of a kitchen extension, the ewi would only be from the house roof to the extension roof level, once the interface betwren the ewi and the insulation in the extension roof was done correctly there wouldn't be the same issue?

Calahonda52

Simona1986 wrote: »

If its the case of a kitchen extension, the ewi would only be from the house roof to the extension roof level, once the interface betwren the ewi and the insulation in the extension roof was done correctly there wouldn't be the same issue?

Bringing the EWI down to the insulation below the roofing in the extension will not get done as it would mean redoing the flashing, which is not going to happen.
Stopping it above the flashing is the more lightly scenario.
My sketch was a general schematic to show the general principles of one of the fundamental rules in insulation: the importance of the insulation layer being continuous

Ailie

Calahonda52 wrote: »

See attached for the basic idea

Thank a mil.ok I think I see what you mean...Is it essentially that the cold can get into the wall from below and still travel up through wall unless insulation is consistent from top to bottom of wall?
Hmm. I might park the back for the time being and just do the front wall and windows. That itself would make a big difference in the house warmth I think.
I appreciate you taking the time to respond.