Does Composite Decking Still Need Cleaning Under Trees?

The trees stay. What changes when you replace the deck?

You can replace the boards. You cannot order the leaves to land somewhere else. That is the useful starting point for a shaded Grand Strand deck: decide which upkeep you want to reduce, then understand the work that remains.

On this Contract Exteriors project in Myrtle Beach, the existing red-painted porch and stair surfaces sat beside a tree-filled yard. The original photographs show leaves and small debris on the steps. Our consultation identified repeated painting and repairs, along with heavy tree debris, as concerns in choosing the replacement scope.

The project records identify TimberTech EDGE Prime+ decking. Later photographs show the installed brown-toned surface and white rails. That gives the next homeowner a concrete example of changing the surface while keeping the setting that made maintenance worth discussing.

Our decking planning guide covers the larger replacement decision. This guide focuses on one expectation to settle before choosing a material: how much care will a deck beneath trees still need?

Why rainfall belongs in the Myrtle Beach maintenance conversation

NOAA’s 1991–2020 normals for the Myrtle Beach station USC00386153 list 53.56 inches of annual precipitation. The July and August monthly normals are 6.61 and 6.27 inches, respectively. Those are long-term station averages, not this year’s totals or measurements at the featured property.

The practical connection is the combination of rain and material that lands on the deck. TimberTech’s 2026 care guide specifically calls for clearing dirt, leaves and other debris from board gaps to support drainage and help prevent mildew. A new surface still needs those spaces kept clear.

Walk through your own setting before the consultation: open deck, covered porch, stairs, nearby trees, furniture and planters. Bring photographs showing where debris collects. The station record supplies regional context; your yard supplies the conditions the contractor needs to see.

Sources: NOAA/NCEI: Myrtle Beach station USC00386153, 1991–2020 monthly normals · TimberTech: 2026 Care & Cleaning Guide

Which jobs disappear, and which ones remain?

“Less maintenance” needs a little unpacking. At this home, avoiding another round of painting and repairs was part of the buying conversation. The replacement photographs show the material change; cleaning-time savings and long-term results have not been measured.

Write down what you currently do and what you want to change. If repainting is the frustration, say that. If the real problem is getting behind a grill to reach fallen leaves, include that too. Those are different needs, even when they happen on the same deck.

How often should you expect to clean it?

TimberTech’s cleaning article recommends a full cleaning at least twice a year and when temperatures are above 55°F. It also advises regular removal of leaves, dirt and pollen. Treat that as a manufacturer starting point, then pay attention to what actually collects between cleanings.

For a new deck beneath trees, plan where the broom and hose will live and how furniture will move when you need access. Cleaning should be part of the ownership conversation before the chairs and grill settle into their permanent places.

The before photograph makes that planning question visible: debris was sitting on the old steps. Before ordering a replacement, look for those collection points on your own porch and include them in the conversation.

Sources: TimberTech: How to Clean Composite Decking

Can you use any cleaner labeled “composite deck cleaner”?

Check the exact product first. TimberTech’s care instructions distinguish Composite, Advanced PVC and older specialty collections. The same brand name on the deck does not make every cleaning method interchangeable.

For current TimberTech Composite decking, its web care guide specifies a medium-to-stiff nylon brush; Advanced PVC has a different brush recommendation. The guide also warns against letting cleaner dry on the surface. Those details are more useful than a vague instruction to give the deck an occasional wash.

Keep the care document with your project paperwork. If you cannot identify an older deck or are unsure about a mark, ask the manufacturer or installer to confirm the material and appropriate method before choosing a cleaner.

Sources: TimberTech: Care & Cleaning

What about pressure washing, rails and the wood underneath?

TimberTech’s 2026 guide allows a power washer for rinsing only, using a fan tip and a maximum of 1,500 psi. That is guidance for its products, not permission to apply the same setting to every deck. Read the complete instructions, including technique and precautions, before using equipment.

Keep the walking surface and the rest of the structure separate in your care plan. TimberTech’s web guidance also calls for regular substructure inspections. Replacing the visible boards does not, by itself, establish the condition of posts, framing or connections.

Our guide to deck rebuild versus resurfacing explains that earlier scope decision. If a deck feels unstable or parts are loose, arrange an assessment rather than treating a cleaning appointment as the answer.

Sources: TimberTech: 2026 Care & Cleaning Guide · TimberTech: Care & Cleaning

What should you ask before choosing a deck for a tree-filled yard?

Ask for the exact board collection, the parts of the porch and stairs included, the proposed rail material and the applicable care documents. Discuss access around furniture and where leaves tend to gather. A useful proposal should help you picture living with the finished space.

If you are still weighing materials, our TimberTech composite-versus-PVC comparison covers that broader choice. Bring the care question into the comparison instead of assuming either category will leave you with nothing to do.

For this Myrtle Beach homeowner, repeated upkeep was part of the reason to consider a new surface. The lesson for your project is to make the maintenance expectation specific. Tell Contract Exteriors which tasks you want to reduce and what your yard puts on the deck; then compare the proposed scope and care requirements together.