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The Basics of Deck Repair

The first step in any Deck Repair Charleston SC project is to get the materials you need. Get your tools together and head to the hardware store. Make sure you have the right wood type and stain.Deck Repair

Small rotted spots are easily removed and treated with a preservative. But bigger problems may require more substantial work.

A joist is the beam that supports a floor, deck, or roof. When it is damaged or rotted, it can cause water damage to other areas of the house and cause sagging floors or ceilings. A professional can determine how much wood needs to be removed and where the joist is located so that it can be repaired. A reputable company can also make sure that all repairs are done correctly and according to code. They will know how to spot other problems that might need attention, such as foundation issues or the need for new support beams.

Joists that are exposed to water or have no means of drying out can become damp and develop fungus. This is especially likely if the joists are near or in load-bearing walls. The fungus can start growing as white strands called hyphae, which then develop into a mycelium that enlarges and penetrates the timber and causes it to split apart at the end, producing a spore that manifests as dry rot.

To repair a rotten or damaged joist, the old piece of timber is cut (A), and then a joist plate is fitted to either side of the original timber. These plates are then bolted to the timber and glued in (B). The joist plate is designed to extend into and over the original joist, making the new joist as strong as the original.

Another way to fix a sagging or weak joist is to install a sister board in the area of the problem. This is a joist that runs parallel to the existing joist but is slightly longer. This new joist is then attached using construction adhesive and nails driven every 16 inches.

In some cases, a joist might need to be completely replaced. This is a more serious job and should be performed by an experienced professional. A reputable professional will also know how to get building permits if necessary and can make sure that all repairs are made according to code.

Often, the cause of a joist problem is poor design or incorrect installation. This can be a result of a bad layout, changes in the structure of the house over time, or the installation of appliances and heating and cooling systems. An expert will know how to identify these problems and correct them before they get out of hand.


If the deck boards on your home are sagging or warping, it may be time to call a deck contractor. In addition to repairing the wobbly boards, you should also check to see if the beams beneath them are rotting. You can do this by tapping the board with a screwdriver and listening for a dull or mushy sound. If you hear that sound, the wood is rotted and needs to be replaced.

There are several types of beams that can be used for a variety of purposes in construction. Some are made of timber, others of steel, and still others of concrete. Each type of material has its pros and cons. For example, timber beams are fast to erect and offer better thermal performance than other materials. However, they are prone to insect infestation and are less fire-resistant than other materials.

Steel beams are usually fabricated from hot-rolled steel. This is because the metal resists shaping when it’s cold. The steel is heated in a furnace until it reaches a target temperature, which allows the metal to be shaped into a beam. The process requires a lot of energy and is incredibly expensive, but it’s essential to the strength of a building.

A straight beam is one that is supported by its ends and can resist bending moments and shear forces. This type of beam is typically used in house construction and temporary bridge construction. A lintel is another type of beam that supports the wall above an opening in a building.

The structural steel beams that you use in your home can be fabricated on-site or prefabricated. On-site fabrication is more costly than prefabricated steel, but it allows you to meet deadlines and avoid delays in project completion. Prefabricated steel is often used in highway bridges, and it’s more cost-effective than masonry or timber for larger spans.

When it comes to analyzing a beam, the factors that you need to take into consideration include the load, the length or span of the beam, and its geometry. The deflection limits of the beam are also important to consider, as are its strength and fire rating.


If the railings on your deck have become loose and rotted, this is a serious safety concern. The balusters and spindles, which support the railing, can fall and break, making your deck a potential hazard for children, pets, and anyone else who uses it. Replacing the rails and balusters is an easy task that any homeowner can do with basic tools.

If your deck rails are loose, first check the railing connectors and screws that hold them in place. Loose screws and connections can cause the railing to pull away from the deck joists and weaken the structure of the entire deck. This can be a serious hazard for anyone using the deck, especially young children and elderly people.

A simple way to repair loose railings is to use a caulking gun to apply a bead of exterior caulk along the joint between the rail and porch post, preventing water from seeping into the joint and further damaging the railing. This is a relatively easy fix and should be done as soon as you notice any cracks in the porch post or any other signs of moisture in your wood deck.

For more serious cases of loose or rotting deck rails, you may need to remove the railing and reinstall it. Whether you decide to install a new railing system or simply replace the old one, it is important that you follow your local building codes for height and width requirements. For example, if your deck is more than 30 inches off the ground, it should be fitted with a railing to protect people and animals.

If you are re-installing a railing system, it is wise to install a pair of post skirts or covers to protect the lower portion of the installed posts from water, dirt, and sun damage. This will keep the structural screws in good condition longer and may help prevent loose rails in the future. To install a cover or skirt, you will need to drill holes for the screws and then screw them into place. Be sure to use galvanized screws for the best results.