Can you put a doormat on carpet?

This is the mat that makes the premium argument awkward, and it is worth being clear about why. Gorilla Grip publishes two figures on this listing: a 0.28-inch profile and a capacity of up to six cups of water. Two numbers is more than most of this category will give you, and both of them are the numbers that decide a purchase - whether the door clears it, and whether it holds anything.

Run the second figure out to the unit the commercial mat world uses and the result is uncomfortable for the expensive end of the shelf. Six cups across a 29 by 17 inch mat works out to roughly one gallon per square yard, which is the same figure the residential WaterHog publishes for itself. That is one maker's claim measured against another maker's claim, with no stated method behind either, so it is not proof that they perform identically. It is enough to say the cheap mat is not obviously in a different class on the one property both brands chose to quantify.

The 0.28 inches matter more than the capacity for most households. A standard interior door is hung with roughly half an inch to three-quarters of an inch of clearance, so this mat clears even the tight end of that range - and you can know that before it arrives instead of after. Almost nothing else in this hub can be bought with that certainty; see low-profile mats and door clearance for the full table.

Where it genuinely gives ground is depth and weather. A flat woven face is not a deep chenille pile, so a soaked dog shaking on it will overwhelm it in a way it will not overwhelm a chenille absorber, and the maker states this is indoor only. Buy it as the mat immediately inside a door with a tight gap. Do not buy it as the mat that dries a wet retriever, and do not put it outside.

Weight is the specification that changes when a mat goes from doormat size to five feet across. A small mat is held down by the furniture of the doorway itself; a 60 by 36 inch mat has fifteen square feet of unsupported middle, and the only things stopping it creeping and curling are its own mass and its backing. At about six and a half pounds this is the second heaviest here, and it feels it.

The surface is the other reason it leads. Gorilla Grip describes a raised ribbed topside with deep grooves and calls the mat waterproof rather than absorbent - which is the correct design for a wide opening that faces outward. Ribs scrape the tread, the grooves hold what comes off below the walking surface, and nothing soaks up and stays wet across an area that big.

That also defines what it is not. A waterproof mat sheds water instead of holding it, so on its own it leaves clean treads and a wet floor beyond it. Our indoor versus outdoor comparison sets out why most entries want one of each; at double-door width, the mat inside is the one doing the absorbing.

The published gap is thickness. Not one mat in this size class publishes a pile height, and this one is no exception, which matters because a door with a low sweep over a 36-inch depth of mat has nowhere to hide. If your door clears less than about half an inch, the figures in our door clearance guide are the place to start and a physical test with a folded towel is the place to finish.

WaterHog is the mat you have already walked on hundreds of times without noticing - it is the standard entrance mat in commercial lobbies, and Bungalow Flooring sells domestic-sized versions of the same construction. Buying it is buying a specification rather than a look.

That specification is the most complete on this page. The Classic construction is published at three-eighths of an inch thick with a gripper backing, or closer to a quarter inch with the smooth backing intended for hard floors, using a 24 ounce per square yard PET fabric. Two numbers - thickness and fabric weight - are two more than most of this category publishes, and together they tell you almost everything: how much it holds, and whether your door will clear it.

The construction detail that matters is bi-level. The raised ridges hold the walking surface up while grit falls into the channels below, so the dirt you scrape off is not the dirt you then walk back over. That is why commercial buildings use it in the second zone of an entry system, and it works the same way at a domestic front door.

The honest downside is cleaning. This is not a mat you put in a washing machine. It hoses down well and it dries reasonably fast, but that is an outdoor job on a dry day rather than a laundry-day job. If the appeal of a mat for you is that it goes in the wash, buy chenille - see best absorbent chenille mats. If the appeal is that it will still be flat and still be working in five years, buy this.