
Portsea Island terraces hide their rafters behind decades of retrofit foam. We strip it back to bare timber by hand and leave you the evidence a Portsmouth valuer will ask for.

Portsmouth is the most densely built city in England outside London, and its roofs show it. Long runs of Victorian and Edwardian terrace cross Portsea Island with party walls and roof voids that carry from one house into the next. Southsea adds Georgian and Victorian villas, many split into flats since the 1970s. Foam went into that stock as a cheap heating fix, often sprayed straight onto the underside of tiles where the sarking felt had already failed. Salt air is the second factor. Homes near the seafront take more airborne moisture than anything inland, and a roof sealed with foam holds that damp against the timber instead of venting it. The decay we uncover here is often further along than the age of the foam alone would explain. On a terrace, where the structure continues into next door, a valuer who cannot see the rafters has more reason to decline than on a detached house. We survey first, map how far the foam runs, and agree scaffold and access before anything is cut.
The hard part of a Portsmouth job is rarely the foam. It is the street. Scaffold, access and containment all need arranging with neighbours who are not paying us, and a crew that arrives without settling that ends up negotiating on the pavement. We sort it at survey, so the price we quote is the price that holds. Removal is hand-led once the bulk is off, no solvents and no heat, because your buyer's surveyor is judging the timber rather than the absence of foam. Every stage is photographed with moisture readings logged throughout.
Our experienced roofing team understands the structure beneath your spray foam insulation, allowing us to remove it safely while protecting roof timbers, tiles and other essential components.
With five years dedicated to spray foam insulation removal, we safely remove both open-cell and closed-cell foam using proven techniques that minimise disruption and help preserve your roof's condition.
We believe in straightforward recommendations, competitive pricing and no hidden costs. Every quotation is clear, with free, no-obligation advice to help you make the right decision for your property.
Terraced access, shared roof voids and coastal damp raise questions a general FAQ never quite answers. These come up most across Portsea Island and Southsea.
Not for work inside your own roof. Scaffold on a shared frontage or access across their land does need agreement, and where foam has crossed the party wall into their void we can only work up to the boundary. Both get established at survey.
Off the pavement at the front in most cases, which means arranging it around parking and pedestrian access rather than dropping it on a driveway. We work that out before quoting, because on Portsea Island it changes both the cost and the start date.
Yes. Portsmouth is one of the Hampshire towns we work in most often, and the parishes around it are covered on the same basis. If you are not sure whether your address falls inside our patch, call and we will tell you at that point rather than leaving you to guess.
We come out and get into the roof space. That tells us the foam type, how far it spreads, the condition of the timber underneath and how equipment will reach it. You then get a written quotation covering the whole job. The survey is free and carries no obligation.
There is no flat rate we could give you before seeing the roof. Price turns on the foam type, how much of the roof it covers, the condition of the timber underneath and how hard the space is to reach. The survey is free, and the written figure it produces does not move once work starts.
Most UK jobs run two to five working days. Where yours falls depends on the size of the roof, how much foam is there and how easy the space is to access. A small loft with a thin layer of open-cell foam sits at the short end, a detached roof bonded in closed-cell at the long end.
JSA Spray Foam Removal proudly serves homeowners and commercial properties throughout Hampshire and the surrounding areas, delivering trusted spray foam removal, roofing services and free, no-obligation quotations wherever you need us.
