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implemented suspended floor insulation

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Khalim Conn-Kowlessar 2023-11-22 22:29:55 +00:00
parent 5aebd43c4b
commit 9adfa4c075
3 changed files with 122 additions and 22 deletions
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5
backend/Property.py
View file

@ -1,5 +1,4 @@
from datetime import datetime
from collections import Counter
import re
import os
import pandas as pd
@ -13,7 +12,7 @@ from epc_api.client import EpcClient
from BaseUtility import Definitions
from recommendations.rdsap_tables import england_wales_age_band_lookup
from recommendations.recommendation_utils import (
estimate_floors, estimate_perimeter, get_wall_type, estimate_wall_area, esimtate_pitched_roof_area
estimate_perimeter, get_wall_type, estimate_wall_area, esimtate_pitched_roof_area
)
ENVIRONMENT = os.environ.get('ENVIRONMENT', 'dev')
@ -596,7 +595,7 @@ class Property(Definitions):
self.number_of_rooms = float(self.data["number-habitable-rooms"])
if self.data["property-type"] == "House":
self.number_of_floors = estimate_floors(self.floor_area, self.number_of_rooms)
self.number_of_floors = 2
elif self.data["property-type"] in ["Flat", "Bungalow"]:
self.number_of_floors = 1
elif self.data["property-type"] == "Maisonette":

120
recommendations/Costs.py
View file

@ -27,6 +27,12 @@ p2.search_address_epc()
p1.set_basic_property_dimensions()
p2.set_basic_property_dimensions()
import pandas as pd
df = pd.read_csv("/Users/khalimconn-kowlessar/Downloads/Hestia Materials - suspended_floor_insulation.csv")
df = df.to_dict("records")
# This data comes from SPONs
regional_labour_variations = [
{"Region": "Outer London (Spon’s 2023)", "Adjustment_Factor": 1.00},
{"Region": "Inner London", "Adjustment_Factor": 1.05},
@ -397,3 +403,117 @@ class Costs:
"labour_hours": labour_hours,
"labour_days": labour_days
}
def suspended_floor_insulation(self, material, non_insulation_materials):
"""
We characterise the steps for suspended floor insulation as the following tasks:
1) Removal of Carpet and Underfelt: Where necessary, remove existing floor coverings to access the floorboards.
2) Removal of Floor Boarding: Carefully remove floorboards to access the space beneath for insulation.
3) Installation of Vapour Barrier: Install a vapour barrier to prevent moisture from affecting
the insulation and floor structure.
4) Installation of Insulation: Fit the chosen insulation material between the joists in the floor void.
5) Refixing Floorboards: Replace and secure the floorboards after insulation installation.
6) Re-carpeting: Lay down the carpet or other floor coverings once the insulation and floorboards are in place.
:return:
"""
# material = {'type': 'suspended_floor_insulation', 'description': 'Thermafleece CosyWool Roll', 'depth': 140.0,
# 'depth_unit': 'mm', 'cost_unit': 'gbp_per_m2', 'thermal_conductivity': 0.039,
# 'thermal_conductivity_unit': 'watt_per_meter_kelvin', 'prime_material_cost': 0,
# 'material_cost': 11.68, 'labour_cost': 1.78, 'labour_hours_per_unit': 0.1, 'plant_cost': 0,
# 'total_cost': 13.46, 'link': 'SPONs',
# 'Notes': 'Spons did not contain labour costs so we use values for similar insulations. We use
# the '
# 'same values as in Crown loft roll 44, since it is also an insulation roll'}
#
# non_insulation_materials = [
# {'type': 'suspended_floor_demolition', 'description': 'Removal of carpet and underfelt', 'depth': 0,
# 'depth_unit': 0, 'cost_unit': 0, 'thermal_conductivity': 0, 'thermal_conductivity_unit': 0,
# 'prime_material_cost': 0, 'material_cost': 0, 'labour_cost': 3.32, 'labour_hours_per_unit': 0.11,
# 'plant_cost': 0, 'total_cost': 3.32, 'link': 'SPONs',
# 'Notes': 'We ignore the plant cost that is in SPONs because we assume the carpet is not scrapped and '
# 'therefore there is no need for a skip'},
# {'type': 'suspended_floor_demolition',
# 'description': 'Remove boarding; withdraw nails; set aside for reuse; ground level', 'depth': 0,
# 'depth_unit': 0, 'cost_unit': 0, 'thermal_conductivity': 0, 'thermal_conductivity_unit': 0,
# 'prime_material_cost': 0, 'material_cost': 0, 'labour_cost': 9.34, 'labour_hours_per_unit': 0.3,
# 'plant_cost': 0, 'total_cost': 9.34, 'link': 'SPONs', 'Notes': 0},
# {'type': 'suspended_floor_vapour_barrier', 'description': 'Visqueen High Performance Vapour Barrier',
# 'depth': 0, 'depth_unit': 0, 'cost_unit': 0, 'thermal_conductivity': 0,
# 'thermal_conductivity_unit': 0, 'prime_material_cost': 0.58, 'material_cost': 1.21, 'labour_cost': 0.48,
# 'labour_hours_per_unit': 0.02, 'plant_cost': 0, 'total_cost': 1.69, 'link': 'SPONs', 'Notes': 0},
# {'type': 'suspended_floor_redecoration', 'description': 'refix floorboards previously set aside',
# 'depth': 0, 'depth_unit': 0, 'cost_unit': 0, 'thermal_conductivity': 0,
# 'thermal_conductivity_unit': 0, 'prime_material_cost': 0, 'material_cost': 1.54, 'labour_cost': 24.98,
# 'labour_hours_per_unit': 0.74, 'plant_cost': 0, 'total_cost': 26.52, 'link': 'SPONs', 'Notes': 0},
# {'type': 'suspended_floor_redecoration', 'description': 'Fitting carpet', 'depth': 0, 'depth_unit': 0,
# 'cost_unit': 0, 'thermal_conductivity': 0, 'thermal_conductivity_unit': 0,
# 'prime_material_cost': 0, 'material_cost': 0, 'labour_cost': 6.59, 'labour_hours_per_unit': 0.37,
# 'plant_cost': 0, 'total_cost': 6.59, 'link': 'SPONs',
# 'Notes': 'SPONs does not have data on re-fitting the carpet so we use the data in Fitted carpeting; '
# 'Gradus woven polypropylene tufted loop\n\n as a baseline. We assume re-use of carpets, '
# 'therefore we need just labour rates'}]
insulation_floor_area = self.property.floor_area / self.property.number_of_floors
demolition_data = [x for x in non_insulation_materials if x["type"] == "suspended_floor_demolition"]
vapour_barrier_data = [x for x in non_insulation_materials if x["type"] == "suspended_floor_vapour_barrier"]
redecoration_data = [x for x in non_insulation_materials if x["type"] == "suspended_floor_redecoration"]
if (len(demolition_data) != 2) or (len(vapour_barrier_data) != 1) or (len(redecoration_data) != 2):
raise ValueError("Incorrect number of data entries for non-insulation materials")
# Break out the individual material costs
demolition_material_costs = sum([x["material_cost"] * insulation_floor_area for x in demolition_data])
insulation_material_costs = material["material_cost"] * insulation_floor_area
vapour_barrier_material_costs = vapour_barrier_data[0]["material_cost"] * insulation_floor_area
redecoration_material_costs = sum([x["material_cost"] * insulation_floor_area for x in redecoration_data])
demolition_labour_costs = sum([x["labour_cost"] * insulation_floor_area for x in demolition_data])
insulation_labour_costs = material["labour_cost"] * insulation_floor_area
vapour_barrier_labour_costs = vapour_barrier_data[0]["labour_cost"] * insulation_floor_area
redecoration_labour_costs = sum([x["labour_cost"] * insulation_floor_area for x in redecoration_data])
labour_costs = (demolition_labour_costs + insulation_labour_costs + vapour_barrier_labour_costs +
redecoration_labour_costs)
labour_costs = labour_costs * self.labour_adjustment_factor
materials_costs = (demolition_material_costs + insulation_material_costs + vapour_barrier_material_costs +
redecoration_material_costs)
subtotal_before_profit = labour_costs + materials_costs
contingency_cost = subtotal_before_profit * self.CONTINGENCY
preliminaries_cost = subtotal_before_profit * self.PRELIMINARIES
profit_cost = subtotal_before_profit * self.PROFIT_MARGIN
subtotal_before_vat = subtotal_before_profit + contingency_cost + preliminaries_cost + profit_cost
vat_cost = subtotal_before_vat * self.VAT_RATE
total_cost = subtotal_before_vat + vat_cost
demolition_labour_hours = sum([x["labour_hours_per_unit"] * insulation_floor_area for x in demolition_data])
insulation_labour_hours = material["labour_hours_per_unit"] * insulation_floor_area
vapour_barrier_labour_hours = vapour_barrier_data[0]["labour_hours_per_unit"] * insulation_floor_area
redecoration_labour_hours = sum([x["labour_hours_per_unit"] * insulation_floor_area for x in redecoration_data])
labour_hours = (demolition_labour_hours + insulation_labour_hours + vapour_barrier_labour_hours +
redecoration_labour_hours)
# Assume a team of 3 people for a small to medium size project
labour_days = (labour_hours / 8) / 3
return {
"total": total_cost,
"subtotal": subtotal_before_vat,
"vat": vat_cost,
"contingency": contingency_cost,
"preliminaries": preliminaries_cost,
"material": materials_costs,
"profit": profit_cost,
"labour_hours": labour_hours,
"labour_days": labour_days
}

19
recommendations/recommendation_utils.py
View file

@ -527,25 +527,6 @@ def get_wall_type(
return None
def estimate_floors(floor_area, num_rooms):
"""
Simple utility funciton, which assuming a 15m squared room, estimates the number of floors in a property
:param floor_area: Gross floor area of a property
:param num_rooms: Number of rooms in a property
:return: Number of floors in a property
"""
# Estimate total room area
total_room_area = num_rooms * 15
# Estimate the number of floors
floors = floor_area / total_room_area
# Round up to the nearest whole number
floors = round(floors)
return floors
def estimate_wall_area(num_floors, floor_height, perimeter):
wall_area_one_floor = perimeter * floor_height