Perplexed by all this talk of u-values and blower door tests? Our sustainable building glossary will help you get to grips with the key terminology.
Green oak is oak that was felled within the last 18 months. Because it is still drying, it has a high moisture content. But according to Oakwrights it is stronger, more durable and easier to work with than dried oak, as well as being less expensive.
Wastewater from baths, sinks, dishwashers, washing machines etc - essentially all a house's wastewater except that from toilets and macerators/food grinders
|ground granulated blastfurnace slag
|ground source heat pump