Replace carpet & install trellis.

While these tasks require different skill sets—one focused on precision textile fitting and the other on sturdy external carpentry—many multi-trade professionals can handle both. This guide outlines the costs, timelines, and technical requirements for getting these jobs done to a professional standard.

What Does the Work Involve?

The process is split between internal floor preparation and external boundary work. A professional approach ensures the longevity of both the carpet and the timber structures.

• Site Survey: Measuring rooms for carpet and checking garden boundaries for trellis height restrictions and underground services.
• Internal Prep: Uplifting old carpets, underlay, and gripper rods, followed by a thorough inspection of the subfloor for damp or rot.
• Subfloor Levelling: Securing loose floorboards or applying smoothing compounds to concrete floors to ensure a flat finish.
• Carpet Fitting: Installing new grippers, heavy-duty underlay, and stretching the carpet into place to prevent future ripples or bunching.
• External Prep: Digging post holes to a minimum depth of 600mm or installing heavy-duty wall anchors for trellis panels.
• Trellis Installation: Setting posts in rapid-set concrete (Postcrete), fixing panels, and applying weather-resistant stains or oils.
• Waste Management: Bagging up carpet offcuts and old timber for disposal via a licensed waste carrier.

Typical Costs

Prices in the UK vary based on the quality of materials chosen, particularly the carpet's wool content and the trellis timber type (e.g., pressure-treated softwood vs. cedar).

Costs are significantly influenced by the condition of your subfloor and the "digging conditions" in your garden. If a tradesperson encounters solid rock or heavy clay when setting trellis posts, labour time will increase.

How Long Does It Take?

Most combined projects of this scale are completed within 1 to 3 days, depending on the weather for the external works.

• Single Room Carpet: 2–4 hours (including stripping the old carpet and prepping the floor).
• Trellis Installation (2-4 panels): 1 full day, allowing for post-setting and panel fixing.
• Full Landing, Stairs, and Garden Trellis: 2–3 days for a two-person team.
• Drying Time: Postcrete sets in minutes, but carpet "settling" takes 24 hours before heavy furniture should be moved back.

DIY or Professional?

While many homeowners attempt these tasks themselves, professional results require specialist tools. For carpet, a "knee kicker" and "power stretcher" are essential to prevent the carpet from becoming loose over time.

Trellis installation is physically demanding and requires precise levelling. If the posts are not set perfectly vertical and at the correct depth, the trellis will catch the wind like a sail and may collapse during a storm. Professionals also hold Waste Carrier Licenses, which are legally required in the UK to transport old carpet and timber to a commercial tip.

Pro Tip: Always check if your tradesperson is insured. Public Liability insurance is vital when they are using power tools in your home or digging near utility lines in the garden.

Choosing the Right Tradesperson

Finding a tradesperson who can do both flooring and garden work often means looking for a high-end property maintenance specialist or a general builder.

• Check Portfolios: Look for clean carpet joins (especially in doorways) and perfectly level trellis lines in their previous work.
• Verify Disposal: Ask to see their Environment Agency waste carrier registration to ensure your old carpet isn't fly-tipped.
• Ask about Subfloors: A good fitter will always discuss the state of your floorboards or screed before laying the new carpet.
• Red Flags: Be wary of anyone who doesn't suggest using underlay or who wants to "dry-fix" trellis posts without concrete or proper anchors.

UK Regulations

While these jobs are relatively low-impact, there are two key UK regulations to keep in mind:

• The Party Wall Act: If you are fixing trellis to a shared wall or fence, you may need to notify your neighbour under the Party Wall Act 1996.
• Planning Permission: Generally, garden structures (including trellis) cannot exceed 2 metres in height without planning permission. If the trellis faces a highway, this limit is often 1 metre.
• Building Regs (Part L): While not usually applicable to carpets, if you are replacing the entire floor deck underneath, you may need to ensure insulation levels meet current standards.

Common Problems

Avoid these frequent pitfalls to ensure your investment lasts for years to come.

• Underestimating Waste: Old carpet and underlay are surprisingly bulky; ensure your quote includes a skip or a "man and van" disposal service.
• Ignoring Damp: Laying a new carpet over a damp concrete floor will lead to mould and odours within months. Always test for moisture first.
• Shallow Posts: Trellis panels act as windbreaks. If posts aren't deep enough (at least 1/3 of the post height should be underground), they will lean after the first winter.
• Door Clearance: New, thick carpet and underlay often mean doors will no longer swing freely. Ask your tradesperson if they include "door trimming" in their quote.

Frequently Asked Questions