RH Segment gross profit for the six months ended August 1, 2020 was negatively impacted by $4.8 million related to product recalls and includes inventory reserves of $2.4 million related to Outlet inventory resulting from retail closures in response to the COVID-19 pandemic.
Excluding the adjustments mentioned above, consolidated gross margin would have increased 320 basis points to 48.4% of net revenues in the six months ended July 31, 2021 from 45.2% of net revenues in the six months ended August 1, 2020.
RH Segment gross profit
RH Segment gross profit increased $345.4 million, or 68.0%, to $853.6 million in the six months ended July 31, 2021 from $508.2 million in the six months ended August 1, 2020. As a percentage of net revenues, RH Segment gross margin increased 360 basis points to 48.3% of net revenues in the six months ended July 31, 2021 from 44.7% of net revenues in the six months ended August 1, 2020.
Excluding the adjustments mentioned above, RH Segment gross margin would have increased 300 basis points to 48.3% of net revenues in the six months ended July 31, 2021 from 45.3% of net revenues in the six months ended August 1, 2020. The increase in gross margin was primarily driven by leverage in our RH Segment occupancy costs and higher product margins in the Core and Outlet businesses in the six months ended July 31, 2021.
Waterworks gross profit
Waterworks gross profit increased $17.2 million, or 72.2%, to $41.0 million in the six months ended July 31, 2021 from $23.8 million in the six months ended August 1, 2020. As a percentage of net revenues, Waterworks gross margin increased 720 basis points to 49.9% of net revenues in the six months ended July 31, 2021 from 42.7% of net revenues in the six months ended August 1, 2020 primarily driven by higher revenues, favorable changes in product mix, and leverage in Waterworks occupancy costs, offset by an increase in shipping costs related to customer deliveries.
Selling, general and administrative expenses
Consolidated selling, general and administrative expenses increased $97.7 million, or 27.1%, to $457.8 million in the six months ended July 31, 2021 compared to $360.1 million in the six months ended August 1, 2020.
RH Segment selling, general and administrative expenses
RH Segment selling, general and administrative expenses increased $93.1 million, or 27.8%, to $427.9 million in the six months ended July 31, 2021 compared to $334.8 million in the six months ended August 1, 2020.
RH Segment selling, general and administrative expenses for the six months ended July 31, 2021 include amortization of the non-cash compensation of $11.7 million related to the option grant made to Mr. Friedman in October 2020, $7.4 million related to asset impairments and $0.4 million related to severance costs and related payroll taxes associated with reorganizations.
RH Segment selling, general and administrative expenses for the six months ended August 1, 2020 include a loss of $9.4 million related to a sale leaseback transaction, $7.0 million related to severance costs and related payroll taxes associated with the termination of associates and a reorganization undertaken in response to the impact of retail closures on our business, $3.3 million related to asset impairments and $2.6 million due to accelerated asset depreciation.
Excluding adjustments mentioned above, RH Segment selling, general and administrative expenses were 23.1% and 27.5% of net revenues for the six months ended July 31, 2021 and August 1, 2020, respectively. The decrease in selling, general and administrative expenses as a percentage of net revenues was primarily driven by reduction in costs and leverage in advertising costs due to our decision to not mail the Spring 2021 Source Books, leverage in employment and employment related costs, as well as leverage in our corporate occupancy costs.
Waterworks selling, general and administrative expenses
Waterworks selling, general and administrative expenses increased $4.6 million, or 18.1%, to $29.9 million in the six months ended July 31, 2021 compared to $25.3 million in the six months ended August 1, 2020.
Waterworks selling, general and administrative expenses for the six months ended July 31, 2021 include $0.5 million related to product recalls and for the six months ended August 1, 2020 include $1.6 million related to asset impairments.