Bike Shelter with Roof

Dimensions

Cut list

Tools you'll need

• ✓

  Measuring Tape (5m or longer)

  Used for measuring each material.

• ✓

  Pencil and Carpenter's Square

  For marking layout lines and checking right angles.

• ✓

  Saw

  Home center cutting service is recommended.

• ✓

  Power Driver

  An impact driver increases work efficiency.

• ✓

  Sandpaper

  Prepare two types: #120 and #240.

• ✓

  Level

  Essential for checking horizontal alignment during assembly.

• ✓

  Clamps (2 or more)

  Used for temporary fixing during joining.

• ✓

  Brush and Paint Tray

  Used for applying wood preservative.

Materials

Build steps

1. 1

   Check Installation Site and Ground Conditions

   ≈ 30 min

   Measure the installation area for the bicycle parking shelter (2400×1200×2000mm). Check ground levelness, sunlight exposure, ground strength (e.g., whether it is prone to mud), and drainage paths.

   Measure

   W 2400 mm

   MeasureSTEP 1 / 10

   Tip

   • If the ground is soft, groundwork preparation is necessary. Lay a thick layer of gravel.
   • Set the height to ensure ventilation under the deck (about 2000mm) to prevent moisture.
   • Confirm the direction of rainwater flow and position the structure to avoid water accumulation.

   Watch out

   • If the ground is weak, the deck may sink and tilt over time.
   • Installing where water accumulates causes the wood to rot quickly.
2. 2

   Prepare Material Cuts

   ≈ 30 min

   Prepare 24 pieces of Western Red Cedar deck boards (20×90×1200mm), 4 pieces of 2×4 joists (38×89×1200mm), 4 pieces of 4×4 beams (89×89×2400mm), 8 pier blocks (150mm square), and 192 stainless steel coarse-thread screws 90mm.

   Cut

   Use the in-store cut service

   CutSTEP 2 / 10

   Tip

   • Red cedar has high water resistance and is a standard outdoor decking material.
   • Choose boards with few knots for a beautiful finish. Though pricier, they last longer.
   • Stainless steel screws are essential outdoors. Iron screws rust and stain the wood black.

   Watch out

   • Using SPF lumber will cause rot within 3-5 years. Use water-resistant species (like Red Cedar or Ipe) for deck boards.
   • If screws are too short, the joists won't connect solidly with the beams.
3. 3

   Install Pier Blocks and Level Them

   ≈ 60 min

   Place pier blocks (150mm square) at the four corners of the installation area. Dig and embed them at ground level. Use a string line and level to align the top surfaces flat. Measure distances between pier blocks (approx. 450mm both left-right and front-back) accurately.

   Build the frame

   Tighten joints firmly

   AssembleSTEP 3 / 10

   Tip

   • Leveling pier blocks is the most critical step determining overall deck levelness; take time.
   • String lines enable simultaneous level checks at four points.
   • Place pier blocks slightly elevated relative to the ground to improve drainage.

   Watch out

   • If pier blocks are not level, the entire deck tilts and items placed on top may roll off.
   • Setting pier blocks in water pooling spots allows water to rise and damage the wood.
4. 4

   Sand Beams and Joists

   ≈ 30 min

   Sand the 4×4 beams and 2×4 joists using #120 then #240 grit sandpaper to prepare the surface before finishing. Pay particular attention to the board ends, as they absorb water.

   Sand

   #120

   SandSTEP 4 / 10

   Tip

   • Beams bear the most load; place sides free of knots or cracks facing up.
   • Joists are laid perpendicular on beams; both parts must be level.
   • Do sanding outdoors and wear a mask to avoid dust inhalation.

   Watch out

   • Insufficient sanding impedes finish penetration, causing early deterioration.
   • Leaving sanding dust causes uneven finish application.
5. 5

   Apply First Coat of Finish to Beams and Joists

   ≈ 60 min

   Before assembly, apply wood preservative to beams and joists, especially surfaces that will become inaccessible after assembly. Use a suitable outdoor preservative (e.g., Xyladecor). Allow 24 hours drying.

   Paint

   Watco oil / varnish

   PaintSTEP 5 / 10

   Tip

   • Pre-coating joint surfaces greatly improves preservative performance after assembly.
   • Apply extra finish to board ends.
   • Members closer to the ground have higher rot risk; prioritize their protection.

   Watch out

   • Assembling before painting leaves joint surfaces uncoated, allowing water intrusion and rot.
   • If it rains before drying, the finish film can run off; check weather forecasts before applying.
6. 6

   Install Beams

   ≈ 45 min

   Place four 4×4 beams (89×89×2400mm) parallel on pier blocks spaced approximately 450mm apart. Insert a waterproof sheet between beams and pier blocks. Fix with stainless steel screws or specialty hardware from below. Confirm horizontal alignment at all four points with a level.

   Build the frame

   Tighten joints firmly

   AssembleSTEP 6 / 10

   Tip

   • Place a waterproof sheet (rubber sheet acceptable) between pier blocks and beams to stop capillary water rise.
   • Using specialized hardware ('pier block brackets') from home centers improves fastening strength.
   • Align beam lengthwise with water flow direction.

   Watch out

   • Omitting waterproof sheet causes water to rise from pier blocks and rot beams.
   • If beams are not level, the entire structure will be tilted.
7. 7

   Install Joists

   ≈ 45 min

   Lay four 2×4 joists (38×89×1200mm) perpendicular on two beams at 2000mm spacing. Drill φ5mm pilot holes through beams and drive two stainless steel coarse-thread 90mm screws per joint (total 8 screws).

   Build the frame

   Tighten joints firmly

   AssembleSTEP 7 / 10

   Tip

   • A 300mm joist spacing is standard support span for 20mm thick deck boards; wider spacing causes sagging.
   • Pilot holes prevent wood splitting; 4×4 lumber is thick but prone to cracking.
   • Check joist top surfaces for levelness while fixing.

   Watch out

   • Spacing joists beyond 500mm causes deck boards to sag under weight.
   • Insufficient screw length fails to reach beams, reducing strength.
8. 8

   Attach Deck Boards

   ≈ 60 min

   Arrange 24 pieces of 20×90×1200mm Western Red Cedar deck boards perpendicular to joists. To maintain a 5mm gap between boards, place 5mm thick spacers (thickness equal to one nail shaft) during fastening. Drill φ3mm pilot holes through boards into joists and fasten each with two 50mm stainless steel screws (total 18 screws).

   Build the frame

   Tighten joints firmly

   AssembleSTEP 8 / 10

   Tip

   • 5mm gaps are essential for drainage and ventilation; closing gaps leads to water pooling.
   • Use 5mm spacers for uniform gaps.
   • Fix with the board's concave side down (towards joists) to prevent discomfort when walking caused by boards curving upwards.

   Watch out

   • Omitting gaps causes water accumulation and rot on board undersides.
   • Driving screws too close to board edges causes edge splitting.
9. 9

   Sand and Apply Finish to Deck Boards

   ≈ 90 min

   Sand the entire deck surface using #120 then #240 grit sandpaper. Pay attention to board surfaces, edges, and ends. Remove sanding dust thoroughly, then apply two coats of outdoor wood preservative with 24-hour drying between coats.

   Paint

   Watco oil / varnish

   PaintSTEP 9 / 10

   Tip

   • Sanding opens wood pores, enhancing finish absorption.
   • Apply extra finish to board ends.
   • Select stainless steel screws; iron ones rust within a year.

   Watch out

   • Incomplete finish coverage allows water intrusion and promotes rot; apply carefully.
   • Rain before drying causes finish to run; confirm weather forecasts before applying.
10. 10

    Final Inspection and Maintenance Planning

    ≈ 30 min

    Inspect the entire structure: check screw tightness, board levelness, uniformity of gaps, and finish coverage. Test drainage by pouring water. Avoid placing heavy items on the first day until finish is fully cured. Annual refinishing extends deck lifespan beyond 10 years.

    Done!

    Done — nice work!

    DoneSTEP 10 / 10

    Tip

    • Lightly sand with #240 grit once yearly and refinish with the same preservative to extend lifespan beyond 10 years.
    • Remove leaves and mud under deck monthly to eliminate moisture sources.
    • In cold regions, apply finish before winter to maintain protection until spring.

    Watch out

    • Neglecting outdoor maintenance causes finish peeling and rot within 2-3 years; annual refinishing is critical for longevity.
    • Allowing moisture sources like leaves and soil buildup under deck leads to underside rot.

Warnings

• ⚠️When used outdoors, applying wood preservative is essential (reapplication recommended once a year).
• ⚠️Use stainless steel screws (iron screws will rust).
• ⚠️Drill pilot holes before screwing to prevent wood splitting.

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