Under deck ceiling ideas
Under Deck Ceiling Options for a Dry Deck
Most under deck ceilings are built to catch rain that falls through the deck. On an AmeriDex deck, rain sheds off the top, so the ceiling below is a finish you choose, not the thing keeping you dry.
What changes when the deck itself sheds rain
Two ways to put a ceiling under a deck
Ceiling drainage system vs AmeriDex with a soffit
| Ceiling or tray under the joists | AmeriDex + vented soffit | |
|---|---|---|
| Where rain is stopped | Below the joists, after it falls through the boards | On top of the deck boards, at the sealed seams |
| Framing overhead | Gets wet every time it rains | Water stays on top of the boards |
| Upkeep | Periodic cleanout of debris | No trough under the joists |
| What the ceiling does | Catches and routes water | Finishes the space |
| When it goes in | A separate trade and visit after the deck | The dry deck is built in; the soffit is your choice |
See every option side by side in under deck drainage systems compared and above-joist vs below-joist drainage.
Under deck ceiling checklist
- Use a vented vinyl or PVC soffit that allows airflow. Wood ceilings are not recommended.
- Provide at least 1 1/2 inches of continuous ventilated screen at the fascia, or use a vented soffit throughout.
- Outdoor space below only. Never install the system over interior living space.
- Plan the deck slope at framing: 1/8 inch per foot, away from the house.
- On decks with boards running away from the house, the framing leaves room for a gutter at the house. Plan the ceiling around it.
- Open sides can still get wind-driven rain. Plan furniture, lighting, and screens with that in mind.
Looking for ways to use the space? See under deck living space ideas and dry usable space under a deck. Building it? The install help page and contractor resources have the details.
Frequently asked questions
Can I put a ceiling under an AmeriDex deck?
Yes. Use a vented vinyl or PVC soffit that allows airflow; wood ceilings are not recommended. Provide at least 1 1/2 inches of continuous ventilated screen at the fascia, or use a vented soffit throughout.
Do I need a ceiling to keep the space under my deck dry?
No. On an AmeriDex deck the boards lock onto the Dexerdry seal, so rain sheds off the top of the deck instead of dripping through the gaps. A ceiling below is a finish choice. Many owners leave the joists open.
How is this different from an under deck ceiling drainage system?
Under deck ceiling and tray systems are installed below the joists to catch water that has already come through the deck boards and route it to a gutter. With AmeriDex, water stays on top of the boards, so there is no trough under the joists that can collect debris or hold standing water.
Why not use a wood ceiling?
The AmeriDex installation instructions do not recommend wood ceilings under the deck. Use a vented vinyl or PVC soffit so air can move through the space between the deck and the ceiling.
Can I build this over a room inside the house?
No. Never install the system over interior living space. It is made for decks, porches, and balconies with outdoor space underneath, such as a patio, an outdoor bar, or storage.
Will the space under the ceiling stay dry on a windy day?
The deck surface keeps rain from dripping through from above. An open-sided space may still get wind-driven rain, so plan furniture, lighting, and screens with that in mind.
Planning a finished space under your deck?
Send us your deck size and what you want to do underneath, and we will send a written quote. Free color samples ship to your door.
Get a free quote Find a dealerRelated reading: Deck rain shield options · Dry usable space under a deck · Second-story deck waterproofing · Balcony waterproofing · How the system works