Property, Plant and Equipment Disclosure
Asset Age Ratios (Summary)
Average Age
Estimated Total Useful Life
Estimated Age, Time Elapsed Since Purchase
Estimated Remaining Life

Builders FirstSource Inc., balance sheet: property, plant and equipment

US$ in thousands

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Land and improvements	343,230)	329,354)	206,321)	198,123)	198,304)
Buildings and improvements	605,042)	565,546)	386,922)	374,909)	358,411)
Machinery and equipment	1,084,467)	937,648)	517,543)	439,449)	403,765)
Furniture, fixtures and information technology	158,541)	138,115)	102,309)	92,094)	78,910)
Construction in progress	206,129)	80,500)	16,568)	29,175)	20,810)
Finance lease right-of-use assets	7,968)	6,054)	43,256)	37,153)	—)
Property, plant and equipment, gross	2,405,377)	2,057,217)	1,272,919)	1,170,903)	1,060,200)
Accumulated depreciation	(837,746)	(671,776)	(523,789)	(449,016)	(390,125)
Property, plant and equipment, net	1,567,631)	1,385,441)	749,130)	721,887)	670,075)

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

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Item	Description	The company
Property, plant and equipment, gross	Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.	Builders FirstSource Inc. property, plant and equipment, gross increased from 2020 to 2021 and from 2021 to 2022.
Property, plant and equipment, net	Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.	Builders FirstSource Inc. property, plant and equipment, net increased from 2020 to 2021 and from 2021 to 2022.

Builders FirstSource Inc., asset age ratios

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Average age ratio	40.62%	38.88%	49.11%	46.16%	45.26%
Estimated total useful life (years)	11	9	11	12	12
Estimated age, time elapsed since purchase (years)	4	4	6	5	5
Estimated remaining life (years)	6	6	6	6	6

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

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Asset age ratio	Description	The company
Average age ratio	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company fixed asset base is old or new. Newer assets are likely to be more efficient.	Builders FirstSource Inc. average age ratio of depreciable property, plant and equipment improved from 2020 to 2021 but then slightly deteriorated from 2021 to 2022.
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company depreciation policy and can be used for comparisons with competitors.	Builders FirstSource Inc. estimated total useful life of depreciable property, plant and equipment decreased from 2020 to 2021 but then increased from 2021 to 2022 not reaching 2020 level.
Estimated time elapsed since purchase	The approximate age in years of a company fixed assets. Useful for comparison purposes.	Builders FirstSource Inc. estimated time elapsed since purchase of depreciable property, plant and equipment improved from 2020 to 2021 but then slightly deteriorated from 2021 to 2022.
Estimated remaining life		Builders FirstSource Inc. estimated remaining life of depreciable property, plant and equipment decreased from 2020 to 2021 but then increased from 2021 to 2022 exceeding 2020 level.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Accumulated depreciation	837,746)	671,776)	523,789)	449,016)	390,125)
Property, plant and equipment, gross	2,405,377)	2,057,217)	1,272,919)	1,170,903)	1,060,200)
Land and improvements	343,230)	329,354)	206,321)	198,123)	198,304)
Asset Age Ratio
Average age¹	40.62%	38.88%	49.11%	46.16%	45.26%

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Average age = 100 × Accumulated depreciation ÷ (Property, plant and equipment, gross – Land and improvements)
= 100 × 837,746 ÷ (2,405,377 – 343,230) = 40.62%

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Asset age ratio	Description	The company
Average age	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company fixed asset base is old or new. Newer assets are likely to be more efficient.	Builders FirstSource Inc. average age ratio of depreciable property, plant and equipment improved from 2020 to 2021 but then slightly deteriorated from 2021 to 2022.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Property, plant and equipment, gross	2,405,377)	2,057,217)	1,272,919)	1,170,903)	1,060,200)
Land and improvements	343,230)	329,354)	206,321)	198,123)	198,304)
Depreciation expense	194,600)	189,300)	94,500)	84,000)	74,400)
Asset Age Ratio (Years)
Estimated total useful life¹	11	9	11	12	12

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Estimated total useful life = (Property, plant and equipment, gross – Land and improvements) ÷ Depreciation expense
= (2,405,377 – 343,230) ÷ 194,600 = 11

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Asset age ratio	Description	The company
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company depreciation policy and can be used for comparisons with competitors.	Builders FirstSource Inc. estimated total useful life of depreciable property, plant and equipment decreased from 2020 to 2021 but then increased from 2021 to 2022 not reaching 2020 level.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Accumulated depreciation	837,746)	671,776)	523,789)	449,016)	390,125)
Depreciation expense	194,600)	189,300)	94,500)	84,000)	74,400)
Asset Age Ratio (Years)
Time elapsed since purchase¹	4	4	6	5	5

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Time elapsed since purchase = Accumulated depreciation ÷ Depreciation expense
= 837,746 ÷ 194,600 = 4

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Asset age ratio	Description	The company
Estimated time elapsed since purchase	The approximate age in years of a company fixed assets. Useful for comparison purposes.	Builders FirstSource Inc. estimated time elapsed since purchase of depreciable property, plant and equipment improved from 2020 to 2021 but then slightly deteriorated from 2021 to 2022.

	Dec 31, 2022	Dec 31, 2021	Dec 31, 2020	Dec 31, 2019	Dec 31, 2018
Selected Financial Data (US$ in thousands)
Property, plant and equipment, net	1,567,631)	1,385,441)	749,130)	721,887)	670,075)
Land and improvements	343,230)	329,354)	206,321)	198,123)	198,304)
Depreciation expense	194,600)	189,300)	94,500)	84,000)	74,400)
Asset Age Ratio (Years)
Estimated remaining life¹	6	6	6	6	6

Based on: 10-K (reporting date: 2022-12-31), 10-K (reporting date: 2021-12-31), 10-K (reporting date: 2020-12-31), 10-K (reporting date: 2019-12-31), 10-K (reporting date: 2018-12-31).

2022 Calculations

¹ Estimated remaining life = (Property, plant and equipment, net – Land and improvements) ÷ Depreciation expense
= (1,567,631 – 343,230) ÷ 194,600 = 6

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Asset age ratio	Description	The company
Estimated remaining life		Builders FirstSource Inc. estimated remaining life of depreciable property, plant and equipment decreased from 2020 to 2021 but then increased from 2021 to 2022 exceeding 2020 level.

Builders FirstSource Inc. (NYSE:BLDR)

Analysis of Property, Plant and Equipment

Property, Plant and Equipment Disclosure

Asset Age Ratios (Summary)

Average Age

Estimated Total Useful Life

Estimated Age, Time Elapsed since Purchase

Estimated Remaining Life