Thermal resistance, represented by R, is a crucial concept in understanding how heat moves through materials like walls in a building. The thermal resistance can be calculated using the equation: R = L k A, where L is the thermal resistance and A is the area of the wall. For example, a dormitory at a large university built 50 years ago has exterior walls constructed of Ls = 30-mm-thick sheathing with a thermal conductivity of ks = 0.1 W/m K.
To reduce heat, the exterior wall of a house is composed of a 20 cm thick layer of ordinary brick (conductivity 0.72 W/m K) and a 2.5 cm layer of plaster (conductivity 0.17 W/m K). In a dormitory at a large university, built 50 years ago, the exterior walls are constructed of Ls = 25-mm-thick sheathing with a thermal conductivity of ks = 0.1 W/m.
The thermal conduction is calculated by dividing the thermal contraction and heat transfer by 2: l, l 0.22 divided by 0.12, and this is equal to l, l 0.22 divided by 0.12. To reduce heat, the exterior walls of a fire-tube boiler are constructed of Ls = 25mm-thick sheathing with a thermal conductivity of ks = 0.1 W/m.
In conclusion, understanding the concept of thermal resistance is essential for designing and constructing buildings that can withstand high temperatures and maintain a comfortable temperature.
📹 A dormitory at a large university, built 50 years ago, has exterior walls constructed of Ls =25mm
A dormitory at a large university, built 50 years ago, has exterior walls constructed of Ls =25-mm thick sheathing with a thermal …
📹 Super Studs – Framing with LSL 2×6’s
If you are building a new home I want to reveal my secret weapon for a “perfect” framing job! We’ll be talking about a man-made …
I’m a Tile Setter I’ve talk to my contractors about using these types studs in kitchen and Shower areas .Most all of them look at me like it wouldn’t be practical. Of course most do care and they’re not the ones floating 3/4in of mud to plumb or flatten a wall. I knew that there had to be contractors out there that have enough sense to know that traditional lumber just isn’t good enough for high end finish work. Great Job!
Hi Matt – I love your articles. One question though; since you seem to be quite OCD when it comes to construction best practices; have you measured the air quality in your finished homes in the first six months? The reason I ask is that with so many man made products ( LSL’s, LVL’s and OSB etc.) is there not an off-gassing issue given the fact that these products are held together with glues?
i have a question about these lsl studs how are they for screwing things to them after such as shelving etc. im in the process of designing and thinking about building and have seen these but i want to install some heavy duty shelves in the potential house but is the lsl any good to screw to for such things
LSL studs may be more in material cost, however I think the labour savings in not having to sort through the pile of lumber to find the best ones for a given wall will even out the cost. Also you’ll likely end up with a higher quality product in the end as all the walls will be dead flat and the openings will be perfectly square. So the sheet rock crew, tapers, cabinet installers and the trim carpenters will be able to be do their portions quicker as they don’t have to custom fit everything to wavy walls and crooked openings.
One complaint I have gotten from contractors is that the edge grain of LSL splits too easily (although face grain is excellent for nailing). This is especially an issue when installing plywood shear walls where there is a tight nail spacing at the ply seams. How does the price of LVL compare to LSL? Have you used LVL as studs? LVL also seems to do better than LSL during construction in rainy environments.
Couldn’t disagree more. Not only are they much, much more expensive, once you switch to them, you’re at the mercy of the manufacturer for price AND availability. Plus, the off gassing for at least a year is awful. If you buy a decent grade of lumber, you shouldn’t have to pick through them all, toss a few sure, but trees are a fabulous renewable resource.