Insulation Direct on Walls?

[Deleted member 262063]

Hi all,

I have just finished insulating a lean to that is not a habital space, so hasn't complied with building regs, but I have used 50mm Celotex and battened the walls.

However I am now looking at a future project of converting the garage. The quote I had detailed using insta stick for the celotex on the walls. Is this something that can be done...It's a new one on me.

All walls on the garage except for the garage door wall are part of the house and the left wall leads into the lean to, which is water tight, so there are no externally exposed walls (if this makes a difference)

 

[JP_]

Yeah, just stick it on. I use Everbuild pinkgrip foam, but they are probably all very similar.

 

[^woody^]

If they are internal walls why do they need to be insulated?

 

[Deleted member 262063]

If they are internal walls why do they need to be insulated?

One of the walls was the old external cavity wall before the lean-to was built, so for regs I would imagine this will need insulation.

My other assumption is that I need to need a certain u-value so some insulation will be needed. im just not sure how much yet

 

[Deleted member 262063]

Yeah, just stick it on. I use Everbuild pinkgrip foam, but they are probably all very similar.

Is there any benefit to using insulation board then plasterboard or using the stuff that's insulation and plasterboard in one?

 

[^woody^]

One of the walls was the old external cavity wall before the lean-to was built, so for regs I would imagine this will need insulation.

My other assumption is that I need to need a certain u-value so some insulation will be needed. im just not sure how much yet

There is no need to insulate internal walls

 

[Deleted member 262063]

There is no need to insulate internal walls

Thanks for this @^woody^ I would never have been the wiser this wasn't necessary.

The wall separating the lean to has all the gas and electrics on. I plan n boxing these in and can't phycall insulate. How would oh approach that?

 

[Nakajo]

The lean-to is a heated space, right?

 

[Deleted member 262063]

@Nakajo it's not heated, just insulated, watertight and has electrics.

I suppose I could insulate the lean-to wall which leads into the garage. That would negate the need to insualte the interior garage wall? Which is 280mm so fairly sure there is a cavity

 

[^woody^]

Thanks for this @^woody^ I would never have been the wiser this wasn't necessary.

The wall separating the lean to has all the gas and electrics on. I plan n boxing these in and can't phycall insulate. How would oh approach that?

With services in garage conversions you either move them, which can be very expensive, or box meters in in some sort of cupboard, and either line the wall to hide pipes and cables or just put them in trunking.

But you need to be clear about what is and is not an internal wall, as your description of a lean-to not being heated may mean that that dividing wall is not in fact an internal wall.

 

[JP_]

Is there any benefit to using insulation board then plasterboard or using the stuff that's insulation and plasterboard in one?

cheaper, better vapour barrier, easier to handle, easier to fit to uneven walls, better u-values.

 

[Deleted member 262063]

With services in garage conversions you either move them, which can be very expensive, or box meters in in some sort of cupboard, and either line the wall to hide pipes and cables or just put them in trunking.

But you need to be clear about what is and is not an internal wall, as your description of a lean-to not being heated may mean that that dividing wall is not in fact an internal wall.

Thanks for the further advice. As the lean-to is a strange one. I am treating the garage wall as an external cavity wall and insulate as if the lean-to was not there. Although I have spoken to the building inspector and they advised it doesn't red it as it's a cavity wall. But 25mm can't hurt.

 

[DevilDamo]

Why are BC involved for something you’re describing as being exempt?

 

[Deleted member 262063]

Why are BC involved for something you’re describing as being exempt?

It's except from planning permission, but converting a garage to a habitable space requires sign off by local authority to comply with regulation the council department were called building control but it'sin reality building regulations.

The lean-to is what I called except as it's just a glorified tool shed

 

[frutbunn]

but converting a garage to a habitable space

Its not a change of use under B Regs. though inevitably there will be some work carried out that will require b regs.