All our buildings are as standard and come with the glass as detailed on the product page. We do not offer an 'upgrade' to double glazing, on the buildings that come single glazed.
Double glazing is not really necessary in buildings less than 40mm. Please see this page for more details on this: Double glazing in log cabins
The cabins that are 19mm to 34mm in thickness are more suited for summerhouse/ storage use, so these will come with single glazing as standard, as double glazing is not needed.
Whereas, our 40mm to 70mm cabins are for all year round use. This is because the thicker the log the better the thermal capacity the cabin will have.
The heat loss is measured by R and U values:
R Value: This is a measurement of the resistance of the flow of heat through a given thickness. This is mainly for a solid material such as a lump of wood, in this case Spruce. Once finding the R value, we can convert it to a U value.Higher the R value the better!
U Value: This is a measurement of heat loss in watts when the outside temperature is at least one degree lower. It is often made up of the sum of parts such as double glazing (glass and air) Lower the U value the better!
Please see the below for the approximate U and R values for dried slow grown spruce timber that we use in our cabins:
- 28mm Spruce Logs – R Value 0.29 –U Value 3.42
- 45mm Spruce Logs – R Value 0.45 –U Value 2.21
- 58mm Spruce Logs – R Value 0.61 –U Value 1.64
Please also see the below for the U and R values for single and double glazed pane of glass:
- Singlepane of glass – R Value 0.94 –U Value 1.10
- Double pane of glass with an air gap – R Value 1.93 –U Value 0.52
With our cabins we do not recommend to insulate the walls of the cabin. As you would be at risk of restricting the natural movement of the timber. Therefore, we advise to go for a thicker log of at least 40mm or above. As the thicker the log the better this will be at retaining the heat inside. When doing this, you would then just need to insulate the roof and the floor of the cabin.
However, this is not to say that it is not possible to insulate the walls, you will just need to creating a floating frame and ensure there will be an air gap, we have a good blog that will show how this can be done below:
Answers to most questions can also be found by typing into the search bar in the widget or our info center or please contact us to help you further with any questions you have.