What is Celotex board used for?
Celotex described their Celotex Insulating Lumber as an exterior sheathing product intended for use as a base beneath plaster or beneath a stucco building exterior as well as for roof insulation.
Is Celotex good for insulation?
Celotex products are highly reflective and reflect more than 90% of radiant energy to outperform traditional insulation in high moisture locations. Celotex boards are a top choice for insulation because they offer a superior combination of thermal, acoustic and fire performance.
What is the R-value of Celotex insulation board?
Celotex GA4000 specifications
| GA4000 boards | GA4050 | GA4090 |
|---|---|---|
| R-value (m²K/W) | 2.25 | 4.05 |
| Thickness (mm) | 50 | 90 |
| Width (mm) | 1200 | 1200 |
| Length (mm) | 2400 | 2400 |
What is Celotex insulation board?
Celotex boards are often PIR boards with foil facings to improve insulation levels. Celotex boards are made using a lamination process, where aluminium foil facings are flued together in a laminator, with an added blowing agent which causes the adhesive to expand into foam. The product is then cut into boards.
Which is better Celotex or polystyrene?
polystyrene is cheaper than celotex. R value or 50mm polystyrene is 1.25. R value of 50mm Celotex is 2.25. It has to be noted that over 7-10 years Celotex will drop in R-value to match the polystyrene as polystyrene will not drop.
How long does Celotex insulation last?
around 60 years
How Long Does Celotex Last? Celotex, if left undisturbed once installed can be expected to last around 60 years.
Does Celotex require an air gap?
When Celotex is fitted between roof rafters, you need to ensure you leave an air gap of roughly 25mm – 50mm between the Celotex boards and the roof itself. This is to ensure air can circulate freely and to avoid damp or condensation.
Does Celotex need expansion gap?
The chipboard should be glued with appropriate adhesive and use temporary edges to provide a gap of around 10 to 12mm to allow expansion.
Which is better Celotex or rockwool?
Rockwool has roughly half the insulation of Celotex, though it does depend on the exact product you’re looking at. Don’t squash rockwool, it will lose most of the insulation effect – it’s the trapped air that insulates.
How long does Celotex last?
Is Rockwool better than Celotex?
Do you need a Vapour barrier with Celotex?
The vapour barrier is key as it stops moisture in the warm air in the habitable areas getting through to the cold side of the insulation and condensing. The combination of foil faced celotex with taped joints and foil backed plasterboard should give a continuous vapour barrier.
Which way should Celotex face?
Face unprinted foil surface towards the air cavity for optimum thermal performance.
How do I fix Celotex to a wall?
Celotex PL4000 Insulation Board – YouTube
Can you put two layers of Celotex together?
You can use two sheets of 50mm but it is not enough to comply with current regulations. You will not achieve the correct “U Value” which is the thermal resistance.
Which board is best for insulation?
Polyurethane (PUR) is one of the most efficient insulation materials on the market. PUR is available in the shape of insulation boards or foam. However, the boards have a better insulation value than the foam variant. Moreover, these boards guarantee a certain thickness in advance and nothing has to be taped over.
Do I need a Vapour barrier with celotex?
Do I need a Vapour barrier with Celotex?
Do I need a vapour barrier with Celotex?
Is Celotex damp proof?
Is Celotex Waterproof? Celotex is moisture resistant. This means it does not absorb water as it has a closed cell structure.
Can I use Celotex to insulate my loft?
Some people may prefer to use rigid insulation board to insulate the loft space – for example Celotex or Kingspan – the process is pretty similar to above, although you will need less depth to achieve the same insulation levels (than mineral wool). You will also need a hacksaw to cut the insulation to size.