Carpet reducer is designed to create a smooth transition from hardwood flooring to a thinner or more delicate type of floor covering, such as carpeting. Carper reducers can compensate for slight difference in height between adjoining floors. 50 x 19 mm carpet reducer is to be use with a solid hardwood flooring, 50 x 15 mm carpet reducer goes with 3-layer engineered flooring.
一个房子打算把楼梯从地毯改地板。其它都好办，不太清楚的是到了最上面一层，木板比地毯厚，怎么处理。二楼和楼梯都是地毯，现在也没精力去把二楼都铺成地板，但是如果二楼保留地毯岂不是出现地板和地毯的高低差？
runner carpet
https://www.coswick.com/moldings/reducers/
Carpet reducer is designed to create a smooth transition from hardwood flooring to a thinner or more delicate type of floor covering, such as carpeting. Carper reducers can compensate for slight difference in height between adjoining floors. 50 x 19 mm carpet reducer is to be use with a solid hardwood flooring, 50 x 15 mm carpet reducer goes with 3-layer engineered flooring.
我家就是这样的 建房时建商就这么做的
就是楔形斜坡木板，高的一端和地板对齐，低的一端压住地毯，钉子固定住就可以了。