Upgrading my loft insulation

[Alshamal]

I have a 60s brick/concrete roof tiled semi 2 bed hipped bungalow, it’s got basic insulation in the loft between the ceiling joists 3”x2” then when i had the cavity wall insulation done they put  another layer of insulation across the top of existing approximately 125mm.

what’s the recommendation to increase the depth to? If any or is what I’ve got is good enough!

If more required any advice on best value and best to use.

I’m a pensioner so would have to get someone in to do it!

Thanks in advance for any advice and suggestions.

[Conor]

300mm would be the modern minimum, in our last house I upped it to 400mm.

 

I'd get someone in to lay another 200mm on top. It'll make a big difference. B&Q often has 3 for 2 offers on earthwool rolls and is generally the cheapest. 

[Redbeard]

@AlshamalIf your roof ventilation is at the eaves consider getting your installer to staple some air-tight membrane (best) or scaffold netting tightly under the rafters at low level, so that they can then shove the insulation in to their heart's content without risking blocking the eaves ventilation. It also helps prevent 'wind-wash' or thermal by-pass - cold air getting in between the layers of insulation.

[MarkyG82]

@Redbeard this is an amazing tip. I'll be doing this. Many thanks 👍