DarrenPalfreyman

Brill Thanks for all your help

Yes it will be like for like its 3000mm wide and 1500mm deep.i will be keeping the original external door but will replace it later on once the porch is complete. Ok so i will go 100mm cavity anyway and fully fill the cavity with rockwool. Do i still need to join existing building cavity or fit a vertical dpc? I will have to phone my local planning then im just going of what ive been googling if i need regs or permission.

Thank you for your input. You think joining the cavity to existing wall and using partial insulation with cavity trays and weep holes would be my better option then

hello everyone. Im looking for some advise. Ive lived in this house a couple of years now and boy did it need some work. My next project is to remove this upvc porch and replace it with double skin walls and a large front door with side windows. Ive asked if i need planning and as its a porch and im keeping an external door in the original place that its not needed. The base is a raft. I will be putting dpc along all bases to build up on but im unsure if i need a vertical dpc where it joins the existing building? I would like to plaster the internal walls along with rendering the external. Also should i use full cavity insulation or partial the cavity will be 75mm. Any advice would be greatly appreiated.