Dpm + dpc

[robinbanks]

The other thing I’m unsure of is if you need insulation under a concrete floor?

It's not about whether it's under a floor or not; insulation is used on the boundary between the heated envelope of the house and the cold world. If it's an unheated porch you don't need to insulate the floor (there is nothing to insulate; the floor is essentially the same temperature as the ground on the other side of the wall)

If you're heating your porch then it's part of the heated envelope of the house and you do insulate, and you build a cavity wall and you indulge that too (or have some other construction such as a timber frame), and you have double glazing and an insulated roof to it also

If you're bulding an unheated insulated porch with the aim of reducing heat loss through the front door it would probably be cheaper and more effective to focus on upgrading the insulation offered by the door (fit a composite, insulation-cored door)

 

[Dereekoo]

Heating or insulated stud walls are irrelevant to the basic best practice - The Bldg Regs require that insulation goes into all interior pours.
The Bldg Regs are for now, and all future owners of the property.

The OP can do what he likes with my above explanation, such as adopting it to his preference but now he knows how to do the job correctly

Building regs don't apply

 

[tell80]

Post # 17,
are you saying that "Building regs don't apply" ref installing insulation in a concrete floor?

BTW: a single skin wall is a wall with masonry laid stretcher wise.

 

[Jake2021]

I thunk what they are saying is it’s a porch 3x1 which falls under permitted development. As there is no electricity and the internal door is staying planing or regulations don’t apply. That doesn’t mean I wouldn’t build it to the standard if there was regulations needed

Yep the block work is stretcher bond

 

[noseall]

Post # 17,
are you saying that "Building regs don't apply"

Building Regulations don't apply to porches full stop.

 

[tell80]

Post #20:
Wrong. Full stop.
Bldg Regs do apply to porches. Full stop.
Why do you keep making such shoot yourself in the foot howlers. Full stop.
Why pretend to any Building Trade knowledge when you obviously dont have any. Full stop.
google will only take you so far. Full stop.
You are talking nonsense & ignorantly misleading OP's & viewers who are looking for accurate answers based on experience not misreadings of google - you are a troll, Boyo. Stop this trolling now please? Full stop.

 

[robinbanks]

Bldg Regs do apply to porches

Can you give me a list of regulations or approved documents that apply to porches? Genuinely curious; I have one to build and want to make sure it's done right

 

[freddiemercurystwin]

Just because a porch does not need Building Regulations Approval there are still parts which must meet the standards written in the Approved Documents, glazing and anything electrical must comply with the regs as must the structure. Any ramped or level access that was there before cannot be made less accessible, the front door must be retained.

 

[noseall]

there are still parts which must meet the standards

You wouldn't want to build it on top of the grass, no. Or the roof to buckle. Or to spontaneously catch fire.

 

[tell80]

Post #22,
Surely with your googling experience you could find the relevant details on the web?
Porches are often doable for a DIY'er but come back to me when you start, dont forget the pics.
I'm always willing to help a DIY'er.

 

[tell80]

Post #24 knows I'm well right, and now he's fluffing about to distract and divert anyone questioning him.
There's no need for it, dont be afraid: I'm always more than willing to help a DIY'er.

 

[Alastairreid]

Post #24 knows I'm well right, and now he's fluffing about to distract and divert anyone questioning him.
There's no need for it, dont be afraid: I'm a DIY'er.

And right on cue the insults start when Troll80 gets caught out.

 

[freddiemercurystwin]

You wouldn't want to build it on top of the grass, no. Or the roof to buckle. Or to spontaneously catch fire.

Eh? What does any of that mean? Come on nosey porches need to comply with certain things, you know that surely?

 

[Dereekoo]

Post #20:
Wrong. Full stop.
Bldg Regs do apply to porches. Full stop.
Why do you keep making such shoot yourself in the foot howlers. Full stop.
Why pretend to any Building Trade knowledge when you obviously dont have any. Full stop.
google will only take you so far. Full stop.
You are talking nonsense & ignorantly misleading OP's & viewers who are looking for accurate answers based on experience not misreadings of google - you are a troll, Boyo. Stop this trolling now please? Full stop.

I notice two other trolls have convened to confirm what neither you nor they understand.
So many trolls, so much Geritol & google consumed by your good selves.

Now, break over, its back to work.

Fact - buiding regs do not apply to porches as explained in post #23, Please see https://www.labc.co.uk/homeowners/do-i-need-building-regulations-application-specific-projects/porch
The OP asked in post #9 whether he needs to insulate the base slab, good practice or not, the answer is no
Just because someone disagrees with your suggestion/ideas/views does not make them trolls
Your post #15 "The Bldg Regs require that insulation goes into all interior pours", not if the building regs do not apply.
It seems that your view is that your view is always right and will not concede that you may have in fact got things a little wrong and this upsets you.
Please carry on helping DIYers and others but answer the questions asked and not what you think should have been asked, answer in facts and not your perceived views, ideas, or notions . Don't feel you need to respond to issues during your break times, take time out, think about it and respond when you are at home in a more relaxed atmosphere.
Chill

 

[tell80]

fmt,
Of course he knew that, he knew all along, and all along has tried to duck & dive, & has taken DIY'er Post #22 into the selfie hole with him.