heat loss calculations

[Moxi]

I’ve pasted this somewhere here before, it’s informative and shows what the DIY enthusiast can achieve, I am using it as the guide for me to complete a missing section of EWI on the cottage.

Moxi

[Richard77]

It was to me Moxi.... It definitely looks "diyable"

Good video though.

[knighty]

EWI depends mainly on the style of the building. You generally end up with a very-modern looking rendered box. No problem if it is super-ugly to start with, but a bit undignified if it is a beautiful Victorian creation...

However EWI keeps the mass within the thermal envelope and therefore the thermal mass helps to modulate temperatures.

It's horrible pebble dash render right now so nothng to lose there!

[knighty]

EWI is not that expensive if you are prepared to DIY most of it, IE prepping the walls, sticking the insulation, fixing the beads, moving any down pipes and extending cills etc. All of which can be done bit by bit. Slightly more challenging is the basecoats and mesh, but it doesn't have to be perfect, then you could get a good spread in to patch up the basecoats and spread to top Silicone render (which is quite tricky) or at least bloody messy.
That is assuming you are OK with a plain rendered finish, brick slips and what-not are expensive and time consuming, but if you have any experience of tiling your bathroom, you're halfway there.

Quite a lot of our house is now covered in EWI and the difference is just light years from how it used to be, me and a mate of mine did 80 m2 ish in 6 days IIRC.

Desp

I'm getting more and more tempted to do it now... figure I could do it all and have the top coat done by someone else

Iquite like the idea of brick slips

I'm mostly worried about extending out all the windowsills etc. and trying to make those look nice, We'll need to extend the roof overhang too and it's a bloody long way up (I fell through a factory roof years ago and landed on my head, not keen on hights!)

[Joeboy]

I’ve pasted this somewhere here before, it’s informative and shows what the DIY enthusiast can achieve, I am using it as the guide for me to complete a missing section of EWI on the cottage.

Moxi

A great video. Good to see his experience grow.

[Stinsy]

EWI depends mainly on the style of the building. You generally end up with a very-modern looking rendered box. No problem if it is super-ugly to start with, but a bit undignified if it is a beautiful Victorian creation...

However EWI keeps the mass within the thermal envelope and therefore the thermal mass helps to modulate temperatures.

It's horrible pebble dash render right now so nothng to lose there!

No brainer then!

Whacking the insulation on the outside has a number of really important benefits: you keep the mass inside the envelope so the building is very resistant to temperature changes and you mitigate “dew point” challenges.

[AE-NMidlands]

We'll need to extend the roof overhang too and it's a bloody long way up (I fell through a factory roof years ago and landed on my head, not keen on hights!)

That's my current project in planning. The intention is to create a new box along the top of the wall and use plastic fascia and soffit trim. I've been building pre-fab bits to see what the weight implications are, i.e. how long they can be before they get too heavy to get up there and hold in place while screwing them to the wall!

I'll definitely be getting it scaffolded properly...

[Moxi]

AE_NMidlands,

When we had ours done they made the extensions from extruded aluminium sections cut and riveted to length, theres also a range of plastic and metal pre made elements like this readily available now in a variety of colours to suit so that might be easier and lighter for you to install?

I will take some photos of ours later to show you how they did it. It was a government incentive so it was bit mass production but it looked ok and its stood the test of time and storms so far - 10 ish years IIRC

Moxi

https://ewistore.co.uk/product-category ... oversills/

[AE-NMidlands]

AE_NMidlands,
When we had ours done they made the extensions from extruded aluminium sections cut and riveted to length, theres also a range of plastic and metal pre made elements like this readily available now in a variety of colours to suit so that might be easier and lighter for you to install?
I will take some photos of ours later to show you how they did it. It was a government incentive so it was bit mass production but it looked ok and its stood the test of time and storms so far - 10 ish years IIRC

Moxi
https://ewistore.co.uk/product-category ... oversills/

Thank you Moxi, I thought there ought to be some ready-made engineered system but failed to find it by searching the net. I shall be interested to see yours, and will keep hunting!
Those sill extender sections are exactly what we shall need too...
Thanks again
A

[richbee]

I’ve pasted this somewhere here before, it’s informative and shows what the DIY enthusiast can achieve, I am using it as the guide for me to complete a missing section of EWI on the cottage.

Moxi

Does look good