In this photo provided by HGTV, designer and host of HGTV's Great Rooms, Meg Caswell, painted the walls red then added a clear glass cover to create a chic, vibrant backsplash. Dubbed the HGTV Effect by some agents after the television channel that focuses on home improvement shows, a growing number of buyers are splurging on homes simply because they're decked out with granite countertops, stainless steel appliances and a fresh coat of a trendy paint colour.