Commercial Window Cleaning · Southern NH & North-Central MA
Commercial Window Cleaning
Storefronts on a recurring schedule and buildings up to five stories. Certificate of insurance on request, workers’ compensation, net-30.
At Joslin & Co, we clean commercial glass for shop owners, property managers and building owners across southern New Hampshire and north-central Massachusetts. That covers two quite different kinds of work: storefront and retail glass on a recurring schedule, and larger buildings up to five stories cleaned less often.
Two kinds of commercial work, and they are not the same job
| Storefront & retail | Multi-story buildings | |
|---|---|---|
| Typical frequency | As often as weekly | Quarterly, semi-annual or as scheduled |
| What it is | Recurring route work | Larger scheduled projects |
| Who buys it | Shop owner, retail or restaurant manager | Property manager, building owner |
| What matters most | Reliability and a crew that knows the site | Insurance documentation and capability at height |
| Scheduling | Same slot, same crew, every visit | Booked ahead, coordinated with the building |
A single quote that treats those the same tends to be wrong for both. Tell us which one you have and we will scope it properly.
Storefront and retail
Street-level glass gets dirty faster than anything else you own
Storefront glass sits at sidewalk level, takes road spray, foot traffic, handprints and weather, and it is the first thing a customer sees before they decide whether to come in. It is also the glass that shows neglect fastest.
That is why storefront work is usually recurring rather than one-off. Frequency runs from weekly for busy retail and food service down to monthly or quarterly for lower-traffic frontage. The right interval is the one where the glass never actually looks dirty. That is cheaper over a year than letting it get bad and paying for a heavier clean.
What recurring service actually buys you
- The same crew every visit. They learn the site, the access, the awkward panes, and what time of day suits you.
- A schedule that holds. You are messaged the day before, so nobody arrives during your busiest hour unannounced.
- Net-30 invoicing, so it runs through accounts rather than someone paying on the spot.
- Uniformed technicians, which matters when the work happens in front of your customers.
Winter road salt
Ground-floor and street-facing glass in this region takes salt spray all winter. It bonds to the glass. It does not wash off cleanly, and left through a season it dulls the surface. Storefront frontage is where that shows first and worst.
Multi-story buildings
We work up to five stories, and we will tell you when you need someone else
Five stories is a hard ceiling. Above that you need a company set up for greater height: rope access, swing stage, and the training and insurance that go with it. We would rather tell you that than take the job and figure it out on site.
Within that range we handle offices, mixed-use buildings, medical and professional suites, mill conversions and apartment buildings. Water-fed pole systems reach upper stories from the ground, which avoids putting ladders against the building and keeps the work off the roofline.
What property managers are actually checking
Property managers do not buy window cleaning on price. They buy it on whether the company can produce paperwork and turn up when it said it would. The checklist is consistent:
| What they ask for | Joslin & Co |
|---|---|
| Certificate of insurance | Available on request |
| General liability coverage | $1,000,000 |
| Workers’ compensation | Carried |
| Uniformed, identifiable technicians | Yes |
| Invoicing on terms | Net-30 |
| A real office to call | Yes |
| Consistent crew | The same cleaners return to the same building |
| Height capability | Up to five stories |
If a building requires additional insured status or specific documentation before a vendor can work on site, tell us at the quote stage and we will sort it before the first visit rather than on the morning.
The insurance question
Why workers’ compensation matters to the building owner
General liability and workers’ compensation are not the same thing, and only one of them covers the person on the ladder.
General liability covers damage to the property. Workers’ compensation covers injury to the worker. If an uninsured contractor is hurt on your site, that exposure does not simply disappear. It looks for the nearest policy, which is usually the building owner’s.
Plenty of small operations in this trade carry liability and skip compensation coverage, because it is expensive and often not required at small headcount. We carry both: $1,000,000 in general liability and workers’ compensation, with a certificate of insurance available on request.
It is a fair question to ask every vendor that quotes your building.
How often
Frequency by property type
There is no single right interval. It depends on foot traffic, how exposed the glass is, and how much the appearance of the frontage matters to the business behind it.
| Property type | Typical interval |
|---|---|
| Retail and storefront, high traffic | Weekly to bi-weekly |
| Restaurants and food service | Weekly to monthly |
| Lower-traffic frontage | Monthly to quarterly |
| Offices and professional suites | Quarterly to semi-annual |
| Medical and clinical entrances | More frequent at entry glass, less on upper stories |
| Apartment and mixed-use common areas | Quarterly to semi-annual |
| After a fit-out or build | Once, as a post construction clean |
If your glass currently looks dirty by the time the next clean is due, the interval is too long. That is usually cheaper to fix by cleaning more often than by paying for heavier cleans.
After a build or fit-out
Construction debris, paint overspray and adhesive residue do not come off with a squeegee. That is post construction window cleaning, abrasive work, quoted separately, and storefront glass takes the worst of it because it sits at street level through the whole build.
How it works
We look at the building, quote it, and set the schedule
- Call or send the form. Tell us the property type, roughly how much glass, and how often you are thinking.
- We come out and look at it. Frontage, story count, access, and anything that needs particular handling.
- We quote it on site, along with any insurance documentation the building needs.
- We agree an interval and the same crew works it from then on.
- Invoicing is net-30.
Nico Joslin has cleaned windows for ten years and founded Joslin & Co in March 2024. There is more about the company if you want it. Joslin & Co is owner-operated and family-owned, which for a commercial account means the person who quoted the building is accountable for what happens on it.
By property type
What different commercial properties actually need
Commercial window cleaning is not one service applied at different intervals. What the glass needs, when it can be worked, and what gets in the way varies a great deal by what the building does.
Retail and storefront
Frontage is the sales tool. Fingerprints, road spray and door-handle marks show within days, and the interior of the glass matters as much as the exterior because customers stand right at it. Usually cleaned before opening or after close so the work is invisible to shoppers.
Restaurants and food service
Grease carries in the air and settles on interior glass in a film that ordinary washing smears rather than removes. Frontage also takes heavy handling. Higher frequency here is not vanity. It is the only way the glass stays presentable between visits.
Offices and professional suites
Entry glass and ground-floor frontage carry the impression; upper stories matter less often. Splitting the two intervals, frequent at the entrance, less frequent above, usually costs less than treating the whole building on one schedule.
Medical and clinical
Entrances and waiting-area glass are seen at close range by people who are already anxious, and cleanliness reads as competence. Access is usually restricted to specific hours, so scheduling matters more than speed.
Mill conversions and older commercial
This region is full of converted mill buildings, and their glass is nothing like a modern curtain wall. Large industrial sash, divided panes, deep sills and original frames all take hand work. Anyone quoting from a photograph will get it wrong.
Apartment and mixed-use
Common areas, lobbies and entrance glass on a schedule, with unit glass handled separately if the building offers it. The practical issue is access and notice rather than the cleaning itself.
Access and method
How we reach the glass, and why it matters to the building
Method is not just a technical detail on commercial work. It determines what happens to the building, what disruption the tenants see, and how long the site is occupied.
Water-fed poles from the ground
A water-fed pole system filters water to remove the dissolved minerals that cause spotting, so glass can be rinsed and left to dry without toweling. On a commercial building the practical advantage is bigger than the finish: upper stories get reached from the ground, which means no ladders leaning against the facade, no weight on gutters or cladding, and no crew on the roofline. Less disruption, and less that can go wrong.
Hand detailing at street level
Storefront glass, entrance doors and anything at close viewing distance is worked by hand. This is the glass customers stand next to, and pole work alone does not give the finish that close inspection demands.
What we do not do
Rope access, swing stage, and anything above five stories. That is specialist work with its own training and insurance regime, and taking it on without that would be doing you a disservice. If your building needs it, you need a different contractor and we will say so at the quote.
Working around your operation
For most commercial accounts the goal is that the work happens without anyone noticing it happened. Before opening, after close, or during a quiet window. The schedule is set to suit the business, and you are messaged the day before every visit so it never lands unannounced.
Common questions
Commercial window cleaning questions
How often should commercial windows be cleaned?
It depends on the property. High-traffic retail and food service is usually weekly to bi-weekly, lower-traffic frontage monthly to quarterly, and offices quarterly to semi-annual. A useful test: if the glass looks dirty by the time the next clean is due, the interval is too long.
How high can you go?
Up to five stories. Above that you need a company set up for greater height, and we would rather tell you than take the job.
Can you provide a certificate of insurance?
Yes, on request. We carry $1,000,000 in general liability and workers’ compensation. If your building needs additional insured status or specific documentation, tell us at the quote stage and we will handle it before the first visit.
Do you invoice on terms?
Yes, net-30 for commercial accounts.
Can the work happen outside business hours?
Scheduling is agreed with you. For retail and food service, working around opening hours is usually the point. Tell us the window that suits and we will build the schedule around it.
Will it be the same crew each time?
Yes. The same cleaners return to the same building, which means they already know the access, the awkward panes and your preferred timing.
Do you clean storefront frames and glass doors?
Tell us what you need covered when we look at the property and we will scope it clearly, rather than leaving it ambiguous on an invoice.
What about glass that is already stained or damaged?
If glass is cloudy after cleaning, the residue is mineral rather than dirt and needs restoration. Polishing and abrasive treatment. If it is a new fit-out with paint or construction debris on it, that is post construction cleaning. Both are quoted separately from routine service.
Do you work with general contractors?
Yes, on post construction cleans. Certificate of insurance on request, workers’ compensation, uniformed technicians and net-30 invoicing.
What areas do you cover?
Southern New Hampshire and north-central Massachusetts, from New Ipswich. Anchor towns include Nashua, Manchester, Concord NH, Keene, Peterborough, Milford and Salem in New Hampshire, and Worcester, Lowell, Leominster, Fitchburg, Chelmsford, Littleton, Marlborough, Concord MA and Acton in Massachusetts.
Where we work
Commercial window cleaning by town
Joslin & Co is based in New Ipswich, New Hampshire, offers four window cleaning services, and provides commercial window cleaning across southern New Hampshire and north-central Massachusetts. Each town below has its own page covering what the work involves there.
New Hampshire
Nashua, NH · Manchester, NH · Concord, NH · Keene, NH · Peterborough, NH · Milford, NH · Salem, NH
Massachusetts
Worcester, MA · Lowell, MA · Fitchburg, MA · Leominster, MA · Chelmsford, MA · Littleton, MA · Acton, MA · Concord, MA · Marlborough, MA
Get your building quoted
Tell us the property type and roughly how much glass, and we will come out, look at it, and quote the work along with whatever insurance documentation the building needs.