Pergola Construction in Glemsford - What to Do While You Wait

What the job involves

Haverhill Fencers constructs timber and metal pergolas for homeowners in Glemsford and nearby, working from our base in Haverhill. A typical pergola build starts with marking out post positions, checking for underground services, digging post holes and setting posts into concrete, then assembling the overhead framework of beams and rafters.

The gap between booking and the start date is not dead time. What you do, or do not do, in the run-up to installation can affect how smoothly the job goes and how good the final result looks. This page explains the steps that genuinely help, and the ones to avoid.

Useful things to do before the team arrives

Mark out your preferred post positions

You do not need to be precise to the millimetre, but having a rough idea of where you want the posts before the team arrives saves time on the day and avoids the pergola ending up slightly out of position from where you imagined. A few bamboo canes or marked stones are enough. If the structure is going against a wall or fence, check that the wall is sound and that the surface you are planning to fix to is solid. Mortar joints that are crumbling or panels that are loose will need attention before any wall-mounted fixings go in.

Clear the area thoroughly

Remove pots, furniture, ornaments and any loose materials from the area where the pergola is going up. This sounds obvious but it is consistently the thing that slows down the start of a job. Post hole digging requires clear access around each post position, and anything left in the way either has to be moved by the team (adding time) or gets in the way of accurate positioning.

If there are established plants in the area, decide in advance which ones are staying and which can be moved. Climbers that are already trained across the space may need to be temporarily tied back. If a plant is close to a planned post position, mention this when you book so the contractor can plan around it rather than discovering it on the day.

Check for underground services

Post holes for a pergola are typically 450-600mm deep. That is deep enough to reach buried pipes and cables in many gardens. If you know where your outdoor electrical cables, water pipes or drainage runs are, mark them clearly before the team arrives. If you are not sure, tell the contractor before work starts. There are cable and pipe detection tools that can be used before digging, and a competent contractor will want to know about potential hazards before they break ground.

Confirm the surface beneath the pergola

If you are planning to lay paving, decking or a new surface beneath the structure, the order of operations matters. In most cases, it is better to set the pergola posts first and then lay the surface around them, rather than laying the surface and then trying to cut or fix around existing slabs or boards. If your paving is already in place, make sure the contractor knows this so they can plan the post positions and fixing method accordingly. Surface-mounted post bases on bolted fixings may be the right choice for a pergola going onto an existing slab rather than posts set into the ground.

Sort out access to the garden

Timber, metal posts and concrete all need to be brought through to the work area. If your garden access is through a narrow gate or side passage, measure it and pass the measurement to your contractor before the job starts. Materials that cannot get through the gate have to be carried over a fence or through the house, which adds time. If there is a specific route that works best, let the contractor know so they can plan their deliveries accordingly.

What not to do yourself

Do not dig pilot holes or prepare post positions yourself

It is tempting to get started and dig out rough post positions before the team arrives, but poorly positioned holes cause more problems than they solve. If the depth or diameter is wrong, or the hole is slightly out of position, the contractor may have to enlarge or reposition it anyway, and the disturbed ground makes it harder to set the post accurately in concrete. Post positions should be established by the contractor using measurements from a fixed reference point, and dug in the correct sequence.

Do not fix any part of the structure yourself in advance

Some homeowners try to get ahead by fixing a ledger board to a wall, or setting a single post as a reference point. Unless this has been agreed with and specified by your contractor, avoid it. A wall fixing that is in the wrong position or insufficiently strong will need to be removed and redone. A post set at the wrong height or angle affects every measurement that follows. These things are quicker to do correctly the first time than to correct.

Do not apply any treatments or sealants to new timber before installation

If you have purchased materials separately and are storing them, do not apply paint, stain or sealant to them before the contractor arrives. End-grain cuts made on site during assembly will be bare timber that needs treating, and pre-finishing the timber can make it harder for the contractor to cut, join and treat the structure properly as part of the installation process. Any surface treatment should be applied after the build is complete and the timber has had time to settle.

Do not remove existing fencing or walls without checking first

If your planned pergola is going next to or against an existing boundary structure, do not remove or alter that structure before speaking to your contractor. Sometimes a fence post or wall section that looks redundant is actually a useful fixing reference or access point during the build. Removing it without consulting the contractor can create complications on the day.

On the day itself

Have the garden accessible from an agreed time. If there is parking nearby that would make unloading materials easier, flag it in advance. If you need to be away during the day, make sure the contractor has a contact number and confirm any specific details, post positions, height, design choices, before you leave, not when the team is mid-installation and cannot easily change course.

Concrete set in post holes needs undisturbed time to cure before the overhead structure is loaded onto it. A good contractor will either allow this curing time within the programme or use a fast-setting concrete mix. Do not walk on, lean against or load the posts until the contractor confirms the concrete has set. This is not a detail to rush.

Typical costs to bear in mind

A new timber pergola constructed and installed in the Glemsford area will typically cost from around £1,500 for a basic 2.4m x 2.4m structure to £4,000 or more for a larger or more detailed build. Metal and aluminium pergolas generally start from around £3,000 installed. These figures cover a standard installation on reasonably level ground; groundworks or surface preparation, if needed, will add to the total.

Ready to plan your pergola?

If you are at the planning stage and want to talk through what is involved, or if you already have a booking with us and want to confirm the preparation, call Haverhill Fencers and we will make sure you know exactly what to expect before we arrive.