Door sweeps

You need the leaf width (not the frame width), the gap from the bottom of the leaf to the floor or threshold at both ends and in the middle, and the swing direction. Door sweeps usually come in standard lengths for 36 inch or 48 inch leaves; for a narrower leaf, cut the aluminium retainer with a hacksaw and trim the insert to match.

A brush (nylon pile) insert tolerates uneven floors and helps keep insects out but seals less tightly against draughts; double or triple fin vinyl seals better on a level floor; solid rubber lasts longer on high-traffic doors. Self-adhesive silicone suits light interior doors, while areas hosed down under pressure call for an anodised or stainless retainer with a silicone insert.

Each door sweep in this category lists the manufacturer part number (MPN), so you can search directly by the number on the old packaging. If the old part is another brand, compare three parameters: retainer length, insert type (number of fins, brush or rubber) and the height of the sealing part against the gap.

Sweeps with a drip cap are for outward-opening doors exposed to rain: the angled lip throws water running down the leaf clear of the bottom gap before it reaches the insert. On interior doors the drip cap is unnecessary. The product name states which items include one.

Position the retainer on the push face, lower the insert until it just touches the floor with light compression, then tighten the screws; slotted holes allow height adjustment. An insert pressed too hard stops the closer from latching the door and wears out quickly. Spring action types lift as the door opens, which reduces drag on carpet.

Retainer colour affects appearance only, not sealing performance. Match it to the handle, hinges and kick plate on the leaf so the opening looks consistent. In washdown or coastal areas, anodised or stainless finishes hold their colour better than ordinary paint.

Dense brush and solid rubber inserts bearing firmly on the floor limit crawling insects at the bottom gap, provided no gap remains at either end of the bar. Plastic or brush sweeps will not stop rodents from gnawing through, so food stores often add a metal kick plate at the foot of the leaf. Check both bottom corners regularly, as that is where the gap is usually largest.

Replace it when the vinyl fin is torn, permanently curled, or no longer reaches the floor with the bar lowered fully in its slots, and when brush bristles are worn short or splayed. On self-adhesive sweeps, adhesive lifting at one end is a sign to replace the whole strip. On high-traffic doors, inspection on a fixed schedule catches wear sooner than waiting for draughts.