$3,000 DIY Bathroom Renovation — Complete Start-to-Finish Guide with $15,000+ ROI

Demolition sequence

1. 1Shut off the main valve (or the zone valve if fitted). Open all bathroom faucets to release pressure. Confirm the meter needle is stationary.
2. 2Disconnect vanity supply lines and drain trap. Cut the drain line and cap it with ABS-to-PVC solvent cement immediately. Remove the vanity as a complete unit.
3. 3Empty the toilet by flushing once and vacuuming residual water from the bowl and tank. Undo the two floor bolts, lift the toilet straight up off the wax ring, and set it in a plastic bag. Stuff a rag in the exposed drain flange to block sewer gas.
4. 4Disconnect tub plumbing. Cut the tub surround panels into manageable sections (use a reciprocating saw) and carry them out without dragging across finished floors.

Subfloor assessment

1. 1With all fixtures removed, lift or cut up all floor coverings to expose the subfloor. Check by pressing with a hammer handle — any area that feels soft or where the hammer drops through is structurally compromised.
2. 2Cut out damaged subfloor sections. Always cut on the centerline of floor joists so both the old and new plywood edge have structural support beneath them.
3. 3Look for the root cause: toilet flange below floor level, missing silicone at tub-to-floor transition, missing floor drain seal at the tub waste, or a hole in the vapor barrier allowing exterior humidity in. Fixing the cause prevents the same damage from recurring.

Shower valve installation

1. 1Mark the centerline of the shower (aligned with the drain) on all walls. Install blocking behind the shower valve location if needed — the valve must be attached to structural wood, not just drywall.
2. 2Mount the shower valve body at the desired height. Use the depth gauge that comes with the kit: the finished tile face should land in the middle of the allowed depth range. Set the valve at about 48 in from the subfloor to the valve center.
3. 3Install the drop-ear elbow for the shower arm at approximately 84 in height. Attach it firmly to a piece of blocking — this fitting carries the full weight of the shower arm and head.
4. 4Connect ½ in PEX lines to the valve's hot and cold inlets using the crimp-ring system: slide the ring on first, push the fitting in fully, then close the Apollo crimp tool until the jaws meet. Use the go/no-go gauge on every fitting before moving on. Run red PEX to the hot inlet, blue to cold.

Pressure test

1. 1Thread the test cap (supplied with the trim kit) onto the shower valve. Restore water pressure slowly. Wait 15 minutes and inspect every PEX crimp fitting for moisture.
2. 2Check the ABS cap on the drain line and both supply stubs at the vanity location. Only proceed to waterproofing and cement board once everything is confirmed dry.

Cement board installation (shower walls)

1. 1Cut Schluter cement board with a sharp utility knife: score the membrane face firmly, snap away from you, and cut the fleece backing. Cutting through the grid lines is easiest — each grid square is approximately 1 in.
2. 2If the studs are bowed, wet-shim the panel: apply a skim coat of All-Set thin-set on the studs, press the board in slightly proud of plumb, tap to level, and secure with two temporary Schluter screws. Let cure overnight before driving all permanent fasteners.
3. 3Drive Schluter stainless screws with washers every 12 in into every stud. The screw and washer must be recessed flush — not standing proud — or they will create high spots under tile.

Kerdi-Band waterproofing

1. 1Cut 2-in square patches of Kerdi-Band and embed one over every screw penetration in thin-set. Every single screw hole must be covered.
2. 2Apply full-length Kerdi-Band strips to all inside corners and all panel-to-panel seams. Embed in thin-set with a drywall knife, keeping the band smooth with no voids or air bubbles.
3. 3For any penetration or odd joint that cannot receive Kerdi-Band cleanly, inject Kerdi-Fix sealant into the hole and smooth flush. This product waterproofs without the 2-in overlap requirement.

Shower pan installation

1. 1Mix Schluter All-Set to a stiff consistency. Spread on the subfloor with more coverage at the edges and at the pan curb.
2. 2Lower the pre-sloped tile-ready pan into position. Check level across the back and side with a 4-ft spirit level. The front edge must be perfectly level — the pre-slope handles internal drainage.
3. 3If the pan rides high in one area, lift it, add more thin-set (creating whipped-cream peaks), and re-set. Allow full cure — 24 hours minimum — before tiling.

Layout and first tiles

1. 1Screw a level ledger board across the back wall at the first full-tile height. Shoot a laser line around all shower walls at ledger height. Mark a vertical centerline on each wall.
2. 2Spread All-Set with a ¼×⅜ in notched trowel in vertical strokes — this allows water behind the tile to travel down to the drain rather than pooling behind a horizontal ridge.
3. 3Apply the back-butter technique to every tile: a skim coat of thin-set on the tile back, then set onto the wall. This guarantees 90%+ mortar coverage and eliminates hollow spots that collect moisture.
4. 4Use a 1/3 stagger (brick offset): the joint of the upper tile should fall at the 1/3 or 2/3 point of the lower tile, never at the middle. Middle-offset (50%) creates alignment issues over long wall runs.

Cuts and penetrations

1. 1For straight cuts up to 24 in, use a manual scratch tool — it is faster and produces clean results on ceramic. For porcelain, use a wet saw.
2. 2For the shower valve cutout: mark the tile using the depth gauge, then cut the circle with an angle grinder. Plunge from the face to mark the line, finish the cut from the tile back to keep the face intact. Verify the trim plate covers the cut cleanly before setting the tile.
3. 3Always put cut edges into inside corners and corners against fixtures — never on exposed outside edges where the rough cut will be visible.

Grouting walls

1. 1Remove leveling clips and clean all thin-set from joints before grouting. Wet the tile surface thoroughly — dry tile pulls moisture from grout too quickly and prevents proper cure.
2. 2Mix unsanded grout to thick whipped-cream consistency. Apply at 45° to the tile joints with a float, pressing firmly into all lines. After 20 minutes, wipe with a damp sponge at 45° — never parallel to the joints, which would drag grout back out.
3. 3Silicone all inside corners and plane changes — do not grout these joints. Use white paintable silicone for a smooth, color-matched finish that remains flexible as the building moves seasonally.

1. 1Apply bonding primer to the subfloor and allow to dry — this prevents the leveling compound from cracking where it meets zero thickness in the centre of a hump.
2. 2Mix floor leveling compound with slightly extra water if you have a significant hump to flow over. Pour along both sides of the hump first, then down the center. Tool lightly to assist flow. Allow 3–4 hours for rapid-set formula.
3. 3Spread All-Set thin-set and roll out Schluter Ditra. Press the entire mat with a rubber float to embed the fleece backing — you should be able to peel back a corner and see full thin-set coverage. Fill every Ditra square with thin-set to complete the structural layer.
4. 4Dry-fit all mosaic sheets before mixing any tile adhesive. Align the mosaic grout lines with the shower wall tile grout lines for a continuous, intentional pattern. Separate and re-space individual tiles where the factory glue spacing is inconsistent.
5. 5Set tiles in All-Set. Use tile leveling clips on all four corners of every tile. Work in small sections so thin-set does not skin over before tiles are set. For the toilet flange area, cut tile to within ⅛ in of the flange — the cover plate will hide the gap.

1. 1Set the vanity cabinet, shim if needed, and screw through the back rail into studs. If the countertop has a gap at the wall due to an uneven wall surface, trace the counter profile, recess-cut the drywall, and set the counter into the recess for a flush fit.
2. 2Install a collar-style pop-up drain (without the lift-rod mechanism). Thread the collar nut hand-tight only — plastic parts crack when over-tightened.
3. 3Dry-fit the P-trap before using any solvent. The horizontal run must slope downward at a minimum of 1° toward the drain stack. Use ABS-to-PVC green solvent: apply to both pipe and fitting, push together with a quarter-twist, and hold for 5 seconds.
4. 4Connect supply lines finger-tight plus ¼ turn with a wrench. Run a 24-hour leak test with a dry rag left under all connections. Drips from threaded connections can be corrected with an eighth-turn at a time — do not overtighten initially.
5. 5Seal the countertop-to-wall joint with paintable hybrid silicone — not grout. Use just three small dabs of silicone to secure the countertop to the cabinet (not a full bead) so it can be removed in the future without destroying the cabinet.

1. 1Insert the rubber twist-seal flange extension into the existing PVC flange. Apply downward pressure while twisting clockwise until it becomes very difficult to turn. The extension flange should sit flush with or up to ¼ in above the finished tile surface at all points.
2. 2Pre-drill and screw the extension to the original flange at 4–6 points to prevent any rocking over time. Install the closet bolts and hold them upright with the plastic retainer washers.
3. 3Use an extra-thick wax ring. Position the toilet over the bolts (both bolts simultaneously), lower straight down without rocking, and press firmly to set the wax seal.
4. 4Tighten the closet nuts gradually and evenly — overtightening cracks the toilet base. Snap the plastic bolt caps in place. Connect the water supply line and run a fill-and-flush test.

1. 1Install the shower arm with 5–6 wraps of Teflon tape, threading carefully to avoid cross-threading the brass fitting in the drop-ear elbow. Seal the wall penetration with Kerdi-Fix before fitting the trim plate. Attach the showerhead hand-tight plus ¼ turn with padded pliers.
2. 2Fit the shower valve trim plate with its foam gasket, secure with machine screws, and attach the handle. Set the temperature limit stop per the manufacturer's instructions. Restore water pressure and test the full range of motion.
3. 3Apply clear silicone to the shower floor-to-wall transition, the shower door track inside corners, and the shower pan curb joints. Apply white paintable silicone to all shower wall inside corners. Apply the same paintable silicone to the countertop-to-wall joint in the vanity area. In all cases: apply a slightly proud bead, smooth with a single wet-finger pass, and do not touch for 24–48 hours.