HEAT LOSS
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If the conservatory is not heated from the main
heating system or it has an external quality door
fitted i.e. double glazed patio or similar then it
should be ignored and not included in the RdSAP,
then the heat loss perimeter will be measured
straight across the wall were the conservatory is
located.
If the conservatory is heated from the main heating
and has not got an external grade door then the heat
loss perimeter will be measured around the outside
walls of the conservatory.
CONSERVATORIES
To be classed as a conservatory 75% of the
roof must be glazed or have a translucent
type sheeting and 50% of the walls must be
glazed.
If the structure does not meet this criteria
then it is not a conservatory for RdSAP
purposes.
FLOOR AREA
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If the conservatory is to be included in
the RdSAP then the floor area will have
to be measured and the measurements
included within for the ground floor
calculations.
Measuring the height of a
conservatory
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The height of a conservatory is
measured in stories from 1-3
1 storey height
1 ½ stories high
2 stories high
2 ½ stories high
3 stories high
ALTERNATIVE WALLS.
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An alternative wall is an area of the property wall that is
thermally different to either the main property or any
extension’s.
RdSAP recognizes 7 types of walls.
Stone, granite or whinestone.
Sandstone.
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Solid brick.
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Cavity.
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Timber frame.
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System built.
ALTERNATIVE WALLS
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To be included in the calculations for RdSAP
the area of construction of an alternative wall
must be a minimum of 10% off the total area
of the building.
Alternative walls
Granite
Timber frame
Cob wall
sandstone
Room in a roof
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For the purpose of RdSAP
The rooms must be accessed from a fixed stair
case and heated from the main heating
system of the property.
When measuring properties that have had
rooms built in loft space, the height of the
intersection of the wall and the roof is the
measurement that will determine if the space
is a loft conversion or a room in a roof.
Loft conversions.
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To be classed as a loft conversion the height at
the intersection of the wall and roof must be a
minimum of 1.8m.
If the measurement is 1.8m or above then the
floor area along with the heat loss perimeter
will have to be calculated for this property.
Loft conversion
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Height at intersection is higher than 1.8m.
Dormer roof
Room in a roof
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To be classed as a room in a roof the height at
the intersection of the wall and roof must be a
maximum of 1.5m if this is the case then only
the floor area will have to be calculated.
Room in a roof.
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Height at intersection is lower than 1.5m.