Is 200mm loft insulation enough?

Is 200mm loft insulation enough?

Then, building regulations stated that homes should have as much as 100 mm of loft insulation. This gradually increased to 200 mm and now stands at 270 mm for new builds and is recommended for other properties (but not essential).

What’s the difference between Celotex GA4000 and TB4000?

The major difference in Celotex GA4000 is that it comes in the size options of 50mm-100mm while the Celotex TB4000 comes in thicknesses ranging from 12-40mm, making it the thinnest PIR insulation available, in a standard board size of 1200mm x 2400mm.

Can you put too much insulation in loft?

Lofts can’t just chip off a layer of insulation, so the need to breathe is far more important. So, can too much loft insulation cause condensation? Yes it can, and it can cause havoc in your home as well.

Should I wear a mask when cutting Celotex?

Cutting and drilling insulation boards will release dust. Inhalation of dust may cause respiratory irritation and other health conditions. Any such activity should be carried out in a well-ventilated area, wearing a dust mask and safety glasses.

What is the thickness of insulation?

When insulating one, you’re aiming for a value of 0.25 W/m2K or less. To achieve this, you should insulate your flat roof with insulation boards totalling around 150mm thickness.

How thick should my loft insulation be?

270mm
If you can get into the loft, measure the thickness of the insulation that’s already there. Since 2003, current building regulations recommend a depth of at least 270mm (mineral or glass wool) in the loft – use this as a starting point rather than a finishing line to see larger savings.

Do I need a Vapour barrier with Kingspan?

Composite products. Composite products (such as Kingspan K118 Insulated Plasterboard) include integral moisture vapour control. As with any vapour control, workmanship is crucial. For example, taping and lapping joints for polythene, avoiding penetrations, and then sealing around any penetrations.