Wall, Roof & Floor Types and Insulation

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Wall Types and Insulation

Q1: How would you record the peak power of a PV system for energy assessment ?*

It is written on the panels

Client must provide a documentary evidence

Ignore it if no data is available

Ask client to provide data and if no data is available then estimate the percentage of roof area covered by the PV panels

Q2: An electric shower*

is a mixer shower

is not mixer shower

can supply hot and cold water with mixing

should be ignored all the time

Q3: A Flue Gas Heat Q3: Recovery System ( FGHRS )*

Can only be recorded in PCDF with make and model

Can be recorded as heat recovery device

Can be installed with combi boiler only mixing

Recovers heat from hot water

Q4: Describe a building defect that may occur as a result of installing an energy efficiency measure.*

Building area may increase or decrease

Building orientation may change

Building detachment may change

Wall damage during wall insulation or installing glazing, Roof damage when installing Solar Panels etc.

Q5: Describe the special factors to take into account for listed buildings and other heritage factors.*

EPC should not be carried out on such buildings

Only SAP assessors can do EPC for them.

Such buildings may not be permitted to make internal changes. Permissions from local authorities may be required. Hence internal changes should be carried out e.g. Internal wall insulation and Secondary Glazing internally. They may require further investigation in order to find out what is suitable for them.

A Green Deal Advisor should advise them about special factors

Q6: Identify when an alternative wall is present.*

Sheltered wall of an unheated corridor is an alternative wall and for a house, wall made with a different type construction as compared to the main house.

When it is an unheated corridor and for stone walls

Timber Frame wall and wall of an unheated corridor

System Built wall and wall of an unheated corridor.

Q7: Describe how to evaluate information in order to decide whether it is reliable for an assessment.*

Double check the information and cross reference against correct values e.g. verifiable documents or visual evidence.

Ask client to provide you the document

Rely on your visual inspection

Ask for an expert opinion

Q8: A solid wall property has 220 mm thick solid wall at front side and 270 mm thick solid wall at the back of property. How would you record the wall thickness of this property ?*

Record the higher wall thickness

Record the lower wall thickness

Record both walls separately by recording one of them as an Alternative wall.

Record average wall thickness of both walls.

Q9: Type of party wall can be judged by:*

Looking at Gable end wall of the loft

Looking at rafters in the loft

Asking the client

Drilling the hole in the wall from inside the property.

Q10: What data is required for an alternative wall ?*

1- Area of wall, 2- Type of wall, 3- Insulation of wall 4- Wall Thickness

1 - Area of wall excluding windows and doors, 2- Type of wall, 3- Insulation 4- Wall Thickness

1 - Area of wall 2 - Type of wall 2- Insulation of wall 4 - Dry lining.

1 - Area of wall 2 -Type of wall 3 - Insulation of wall 4 - The U-value.

Q11: For Flats, a sheltered wall in an unheated corridor should be recorded as:*

Alternative wall

Heat Loss Wall as well as Alternative wall

Heat Loss wall

As seen

Q12: Walls of a park home made with prefabricated panels should be recorded as:*

System built wall

Park Home wall

Block walls

Solid Block walls

Q13: A timber frame wall can be identified by spotting vertical timber panels in the :*

Stud wall of the loft

Sloping wall of the loft

Gable end wall of the loft

Flat ceiling of the loft

Q14: Insulation for this wall should be recorded as:*

As built insulation

Filled Cavity wall insulation

External Cavity wall Insulation

External Solid wall insulation

Q15: Why is it not recommended to record "Unknown" wall insulation ?*

It will decrease the EPC rating.

RDSAP will not generate a Recommendation on the EPC for the wall insulation.

It is not allowed to do so.

It will increase EPC rating.

Q16: There is no visual or documentary evidence available for the insulation of walls. The insulation should be recorded as:*

Unknown insulation

As built insulation

No insulation

Internal insulation

Q17: A wall made with solid concrete panels would be a:*

System built wall

Solid wall

Alternative wall

Park home wall

Q18: The house in the photo below shows what type of wall construction?*

Granite/whinstone wall

Sandstone/Limestone wall

Solid wall of blocks

Cob wall

Roofs and Room in Roof:

Q19: Explain the outcome if an assessor selects ‘unknown’ instead of ‘built’ in an assessment*

Unknown insulation will not generate a recommendation on the EPC certificate and as Built will always assume that property is insulated.

Unknown insulation will not generate a further recommendation on the EPC certificate. As built insulation will assume the level of insulation as it was when the property was built and will generate further recommendations on the EPC if required.

Unknown insulation assumes no insulation

Unknown Insulation will assumed insulation if property is built after 1980s

Q20: No Access to the loft is when:*

Loft hatch is more than 3 meter high

Loft hatch is too small to go into the roof.

There is no loft hatch.

Loft hatch is locked and the key is not available at the time of assessment.

Q21: A flat is built within a Room in Roof with Solid wall at the gable end wall. What should be the wall type of the flat for the assessment ?*

Solid wall

Timber Frame wall

Timber Frame wall and Solid wall as Alternative wall

Same as Main house wall type

Q22: There is no visual or documentary evidence available for the insulation of Room in Roof. What would you record for the insulation ?*

Unknown insulation

Flat Ceiling insulation only

Insulation at all elements

As built insulation

Q23: Insulation of Flat roofs should be recorded as:*

As built all the time.

As built when no visual or documentary evidence is available.

Unknown Insulation

Unknown insulation when no visual or documentary evidence is available.

Q24: For a sloping ceiling roof, there is no evidence available for the roof insulation. What should be recorded for the insulation ?*

Unknown insulation

No Insulation

No Access and Unknown insulation.

As built insulation

Q25: How would you record a 100 mm rigid board insulation for a pitched roof?*

Record as it is.

Double it up and record 200 mm insulation.

Record it as 150 mm insulation.

Rigid Board insulation is not applicable in the RDSAP.

Q26: A loft hatch is locked and no key is available. What would you record for the loft insulation?*

No Access and As built insulation

No Access and Unknown Insulation

Access and As built insulation

Access and Unknown insulation

Q27: There is no access to the loft of a pitched roof house and no documentary evidence of insulation is available. The roof insulation should be recorded as.*

As built insulation

Unknown insulation

No insulation

Record only 50 mm insulation.

Floors:

Q28: Part of a house is built over an open space. How would you model this part of the house?*

Record as part of the house and choose suspended floor.

Record the floor as an unheated space below.

Record the floor as External to air.

Enter this part separately as an Extension and Choose Floor Type " external to air "

Q29: A flat is built above a Shop. What would you record for the floor location of the flat?*

Partially heated space below

Another dwelling below

Unheated space below

Heated space below

Q30: Flat A is built over another flat B. What should be the floor location of Flat A.*

Suspended

Same Dwelling below

Another Dwelling below

Heated space below

Q31: Insulation of Floors should be recorded as:*

As built; when no evidence of retrofit insulation is available.

Unknown Insulation; as it is not possible to view floor insulation.

Retrofitted insulation as the client has told you about it.

Choose As Built only for suspended Floors.

Are you human?*

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