Home-improvement chains had a blockbuster 2020 as revenue and profit surged from stuck-at-home Americans splurging on paint, tools, and gardening equipment to upgrade their living spaces through DIY projects. A strong housing market and fresh government stimulus floated earlier this year also helped lift consumer demand.

The steady rollout of COVID-19 vaccines, however, prompted more Americans to return to outdoor activities and abandon some pandemic-induced shopping habits.

U.S. same-store sales at Home Depot climbed 3.4% in the second quarter - the smallest increase in two years, and missed analysts' estimates of a 4.9% rise, according to IBES data from Refinitiv.

Underscoring the slowdown was data on Tuesday that showed a bigger-than-expected drop in July retail sales, partly reflecting the rotation of spending from goods to services such as travel and entertainment.

Home Depot Chief Financial Officer Richard McPhail told Reuters that sales in the first two weeks of August were comparable with the second quarter, but any potential impact from the fast-spreading Delta coronavirus variant is still uncertain.

"We don't see anything that we would point to and say that's the impact of Delta, not yet," he said, as the company did not provide a full-year outlook.

The slowdown in Home Depot's sales also lowers expectations for smaller rival Lowe's Cos Inc, which is even more dependent on DIY consumers than Home Depot, J.P. Morgan analysts said.

Lowe's will report its quarterly numbers on Wednesday.

Home Depot's quarterly second-quarter net sales rose 8.1% to $41.12 billion. The home-improvement retailer earned $4.53 on a per-share basis, beating estimates of $4.44 per share.

(Reporting by Uday Sampath in Bengaluru; Editing by Sherry Jacob-Phillips)

By Uday Sampath Kumar