U-Values (Leaving Cert Construction Studies): Flashcards

📚Flashcards
Revision NotesModel AnswersQuizzesFlashcardsExam Questions
U-Values
Sign up to keep revising.Create a free account to study more flashcards and track your progress.

Practise the cards

10 cards from this deck

Show

U-value measures

Rate of heat transfer through building material

U-value units

W/m²K (watts per square metre per Kelvin)

Lower U-value means

Better insulation performance

Max U-value for walls (W/m²K)

0.21

Max U-value for windows/doors/rooflights (W/m²K)

1.6

BER units

kWh/m²/yr

BER certificate validity period

10 years

Formula to calculate U-value

U=1RTU = \frac{1}{R_T}

Formula to calculate resistance RR

R=TkR = \frac{T}{k} where T=thickness, k=conductivity

Methods to reduce U-values

Air cavities, insulation, thickness, high-resistance materials

Explore Leaving Cert Construction Studies Revision Notes by Topics

U-Values

Insulation and Ventilation

Insulation and Ventilation

Explore Leaving Cert Construction Studies Model Answers by Topics

U-Values

Insulation and Ventilation

Insulation and Ventilation

Explore Leaving Cert Construction Studies Quizzes by Topics

U-Values

Insulation and Ventilation

Insulation and Ventilation

Explore Leaving Cert Construction Studies Exam Questions by Topics

U-Values

Insulation and Ventilation

Insulation and Ventilation

Join 100,000+ Leaving Cert students studying Flashcards with us.

Select your subjects, and get access to A+ resources today.