My wife and I are in the process of selling our renovated 4 bed terraced victorian house (EWI, IWI, ASHP, UFH etc)

The house we have 'purchased' or in the process of is completely different being a 5 bedroom detached property of cavity wall construction overlooking the Bristol Channel.

We have a few things that will need doing (ie the whole house) and I'd like to pick all your brains before GBF is no more.

Link to some photos of the property:
https://drive.google.com/drive/folders/11RqhhMeBvsiUnyTCB9q9tw3FefxZ9YaP?usp=drive_link

Our queries are as follows in no particular order:

Heating System
https://drive.google.com/drive/folders/11RqhhMeBvsiUnyTCB9q9tw3FefxZ9YaP
Standard gas boiler present - we would like an ASHP again and UFH is a must. The existing Ground floor make up is slab (assumed insulated) with a parquet top floor covering. I don't want to dig up the whole floor and insulate then 3" of screed etc. Does anyone have experience with the 25mm pre made trays that just get self levelled?. We understand the parquet would have to go if we want UFH
- Would you even use UFH or look at air-to-air systems? We're not really fans of air to air from our experience in my wifes 2 shops we much prefer the UFH
- Would electric UFH be a better system again and make use of solar and battery storage?

Single Storey Rear Extension (probably 4m x 10m)
https://drive.google.com/drive/folders/11RqhhMeBvsiUnyTCB9q9tw3FefxZ9YaP
- Would like bifold doors or slide and hide etc - recommended suppliers?
- What build would you go for? Block on flat with EWI and a pitched roof with veluxes?
- Flat roof with a lantern?
- Cavity wall?
- What slab would you go for? Or ground screws?
- Timber frame?

Thermal Envelope
- EPC suggests cavity wall insulation present (but no idea what type or how well installed)
- Assume EWI a good shout after the extension and windows are done? Or Before?

Solar Panels - South facing front elevation with both East and West facing pitches
- What is available as a grant these days if any?
- Worth getting integrated panels and renewing the roof at same time? Roof does appear in good order overall mind

Front Porch - Removal
https://drive.google.com/file/d/1B-VpHGUqUlascnhMbsdKpxQxifg7WSUV/view?usp=sharing
- We're not really a fan of the front porch it just appears to be dead space
- How easy would it be to turn into a flat roof structure and extend to the existing balcony? Assume EPDM
- Or just remove and install one grand front door

Really excited to take this on as these houses don't come up often on the road they are on and is everything we feel we need in a house

Hi Nick

It's a 50s/60s build so I guess it probably has no floor insulation. This will be a mess to install retrospectively I'd imagine. If so, do you have any experience with low profile underfloor heating systems?

As for the CWI there are vents present so I'll try and take a proper look. I know the grey beads are best but l assume this would be best done after the window work and rear extension...

If the longer goal is to EWI will the standard 90mm EPS suffice if the CWI is 'upgraded' ?

Possibly, we're awaiting till Tuesday to book to get a level 3 survey carried out.

The survey I could carry out myself but I'm going I can use the report as justification to lower the price slightly....

This is a lot bigger project than my terraced house...

But this should be our forever home and will add a fair bit of value I feel

Posted By: VictorianecoWhat would people suggest to clad our render the front to give a classic/timeless look?

Since this is the Green Building Forum, have you considered:

Lime: https://www.lime-green.co.uk/products/lime-render

or Sprayed Cork: https://corksoluk.com/

Both of which should look less 'modern' than acrylic/silicone and should be better for the house underneath than ''traditional' cement