Summer Heat Protection with Natural Wood Fibre Insulation Explained
Вставка
- Опубліковано 26 сер 2024
- Fintan Wallace explains how wood fibre is great for keeping you warm and keeping you cool. Using a heat-lamp experiment, he demonstrates how heat transfers through different materials and what this might mean for maintaining a comfortable internal temperature in buildings.
Fabulous info and thank you. We're about to use wood fibre panels on the roof and soft wood fibre for the wall insulation here in Sydney. The house will be wrapped with Pro-Clima Solitex Exastana and we're fitting an HVAC system and U-PVC double glazed windows/doors. Should make for a wonderfully stable and moisture-free environment. This was very helpful in making the decision to use wood fibre. Cheers - David
Glad it was helpful!
Great demonstration, very helpful!
It would be interesting to see where PIR sits in this graph too?
Thanks for the comment. PIR is covered under "synthetic" insulation with a specific heat capacity of approximately 1200-1400 J/kgK.
PIR is basically the same PUR with improved fire resistance
@@chris-2496 tiešām labs tests ne?
@@vikentijslauruts2153 laba demonstrācija. Strādājot koka karkasa māju ražošanas uzņēmumā arī izgatavojām tādu demo ar akmens vati, celulozi un kokšķiedru vati. Secinājumi tādi paši.
😊😊great reports. 100% agree. German carpenter master. 👍👍🇩🇪. Don't build a house with 2/4. Better. 2/10.
How is it possible that a material which is good in keeping the heat inside (high RC value, such as pir) is poor in keeping the heat outside. Or the other way around, how is it posible that a material with a lower rc value is capable in keeping the heat outside, such as the wood fibre.
Can you explain me that, preferably in non technical terms ;)
In this demonstration, the wood fibre insulation absorbs the heat better when compared to mineral wool and polystyrene. This improved heat absorption is coming from a combination of the high Specific Heat Capacity, density of the wood fibre and its thermal conductivity. Which basically means the wood fibre warms up slower, and then releases the heat (back into the home) slower. Resulting in excellent protection from summer heat.
becase the heat from the sun is radiant heat that doesn't need a material to transfer energy. the heat inside yiur house is the warm air and needs a material to tranfer its heat tru conductivity. so some materials are less conductive than others thats why steel feels cold tho touch and whool feels warm to touch. some materials are better at storing radiant heat. in the eps and rockwool insulation do not have a place to store the energy that hits them and radiate it to the cooler air inside your home. if then at night the oudside temperature drops. the warm air isn't able to conduct its heat back out. this leats to high cooling bills in summer
What about colder environments?
In addition to reducing summer overheating, Gutex Wood fibre insulation products give excellent insulation in colder environments (the market for wood fibre insulation boards is massive in Scandinavia for example). In addition to having a thermal conductivity similar to mineral wool insulation the boards, when used externally, give excellent wind tightness that prevents wind washing/thermal bypass from the wind penetrating the insulation in between the timbers behind.
how can we conduct this test can you guide me.
if you would like to conduct a similar test then please contact us via our contact form on the website and we'll see if we can assist you.
Why haven't you performed the test with polyurethane insulation foil covered?????? Sure everyone is using it.
Hi Noel,
Good point. I’m afraid there is a limit to the number of insulations we can test in the hot box. We can run another video in the future with the foil faced PUR. Based on experience though the inclusion of the foil has negligible effect. Radiant heat will be reflected to some degree by the foil but the most significant influence is the thermal diffusivity of the insulation, the lower the better. Optimum outcomes result from thermal insulation with the best combination of low thermal conductivity, high density and high heat storage capacity 😊
Highly toxic, like surrounding your home with a can of oil !
I think this test is irrelevant to what happens in real life in a house when it's hot outside for more than 15 minutes.
The demonstration box is aimed at showing the enhanced heat absorption achieved by wood fibre insulation compared to mineral wool and polystyrene. This heat absorption is coming from a combination of the Specific Heat Capacity, density as well as the thermal conductivity. Wood fibre has a lower thermal diffusivity than mineral wool and polystyrene and also PIR even though the thermal conductivity is similar or not as good. This does indeed give reductions in summer overheating - especially on South facing wall and pitched roof structures.