we have very poor drainage in our slightly elevated clay back garden a

Harvey Fielding

Hi Carolyn, If you want to prevent warer from entering under your garage door, you can put a linear drain across at ground level to catch the water and then pipe it away to a newly built soakawy drain, if you do not already have one nearby, however I would reccomend yuo consult a builder first to look at water levels etc. hope this helps Harvey Fielding