** Shares of home improvement firm Masco <MAS.N> down about 7% at $63.34 premarket

** Co lowers annual adjusted profit forecast and misses third-quarter estimates, as higher costs hurt margins in its plumbing business and demand for decorative products stayed weak

** Co now expects annual adjusted profit between $3.90 and $3.95 per share, vs previous forecast of $3.90 to $4.10

** MAS expects tariff impact of about $150 million before mitigation in 2025, up from prior estimate of $140 million

** Posted Q3 sales of $1.92 billion, compared with analysts' estimates of $1.94 billion - as per data compiled by LSEG

** Reports adjusted profit of 97 cents per share, missing estimates of $1.03

** As of last close, MAS down 5.7% YTD

(Reporting by Sanskriti Shekhar in Bengaluru)

((Sanskriti.Shekhar@thomsonreuters.com))