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Read our step-by-step guide to repairing your kitchen sink drain trap to fix slow drainage and unpleasant smells.

Has a tree root caused your asphalt walkway to raise up and crack? Don't worry - seasoned DIYers can handle this fix in a day.

This Old House general contractor Tom Silva shows DIY and professional techniques for how to get rid of attic mold.

Have a project that requires you to cut and solder copper pipes? Find out everything you need to know with this step-by-step guide.

This Old House plumbing and heating expert Richard Trethewey explains the various copper pipes commonly used in a home plumbing system.

Silencing a rattling metal heating unit with This Old House plumbing and heating expert Richard Trethewey

This Old House general contractor Tom Silva saves a crumbling mortared-rock foundation wall

This Old House host Kevin O'Connor shows how to fill gaps and make a space cozier and energy efficient.

Quick tips for moving material, from This Old House landscape contractor Roger Cook

A local historian offers a look at Arlington's ice-harvesting industry. Richard addresses the water pressure problem. Tom fits flooring. Kevin finds a business that replicates historic wooden gutters.

Roger helps a homeowner plant a low-cost, low-maintenance privacy screen. Tommy demonstrates many uses for a speed square. Richard uses new technology to seal ductwork from the inside.

General contractor Tom Silva asks the crew about the purpose of open-ended plastic coils

General contractor Tom Silva asks the crew to guess the use of a device with a weighted base and stainless-steel rods

Plumbing and heating expert Richard Trethewey asks the crew the function of a black object with five ports and a spinning control unit

Landscape contractor Roger Cook gets the crew's opinions on the function of a magnetic hose

General contractor Tom Silva questions the crew about the task of a small flexible item

Plumbing and heating expert Richard Trethewey asks the crew to guess how a small item with buttons and threaded parts works

Landscape contractor Roger Cook asks the crew to guess the identity of a green steel object with a lever and clamping teeth

General contractor Tom Silva questions the crew about the function of a blue device with a steering wheel attached to a stand with rubber mat

Landscape contractor Roger Cook asks the crew the task of an object with steel and plastic parts

Plumbing and heating expert Richard Trethewey asks the crew about the use for this set of bright orange, grooved plastic items

General contractor Tom Silva asks the crew to share what they think the purpose may be of handheld, magnetized objects