Field Guide

How to measure it, how to tell what you have, and how to fit it. The questions we actually get asked.

How to Cut a Clean Drywall Opening

Drywall only forgives you in one direction. A hole that is too small takes a minute to fix. Too big takes an afternoon.

Powder-coat is smooth on purpose, which is exactly why paint slides off it. Two steps fix that.

Two ways to put colour on steel. One of them is why your old vent has a grey chip at every corner.

Lower number, thicker steel. It is the one spec that decides whether a register still sits flat in five years.

They do the same job in the same system. The difference is what they have to survive.

Both cover the same hole. The choice comes down to two things: whether anyone will look at it, and whether the room gets wet.

One number decides whether this goes well: the cut-out. Get that right and the rest is twenty minutes.

Unlike floor registers these are fastened, which means the one thing that matters is what the screws are biting into.

There are no fasteners. If the opening is a standard size, the register sits in it under its own weight.

Six standard sizes cover almost every residential floor duct. Here is how to find yours and confirm it will sit flat.

They look similar, they are not interchangeable, and the give-away takes ten seconds to check.

Ninety percent of wrong-size returns come from measuring the wrong thing. Here is the right thing, and it takes under a minute.